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Morphology

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Of all the Graptemys species, the Texas Map Turtle is the smallest. This species is sexually dimorphic.Females range in length from 5-8 inches long, while males tend to be about half the length of females, approximately 2.5-4 inches. The carapace of these turtles is an olive color, with intricate yellow-orange lines on each scute. The vertebral keel, which is even more prominent in the immature turtles, has dark yellow shading on the adults. The plastron is cream colored and bears few markings except for the dark lines that outline the seams. Its head is tapered with a pointed snout. Yellow and orange patterns also decorate its head, neck, legs, and tail. These patterns, which resemble the intricate contour lines of a map, give the map turtle its name. Males have long, dense tails, and older females have larger heads than younger females. The most noticeable characteristic of this turtle, though, is the prominent orange, J-shaped mark that sits directly behind each eye. Although there are several turtle species that resemble the Texas Map Turtle, this mark helps to easily distinguish it from other species (Bartlett 1999; Ernst 1994; Kirkpatrick 1993, Smith 1952).

Other Physical Features: ectothermic ; bilateral symmetry

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Fimbel, K. 2000. "Graptemys versa" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Graptemys_versa.html
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Habitat

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These turtles stay within close proximity of the Colorado River drainage area. They prefer shallow waterways where there is a moderate current and abundant vegetation. The substrates of the waterways these turtles inhabit tend to be either sand, clay, or limestone. When not in the water, they are often found on basking snags (Bartlett 1999; Ernst 1994; Kirkpatrick 1993).

Aquatic Biomes: rivers and streams

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Distribution

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An endemic species of the state of Texas, Graptemys versa, or what is commonly called the Texas Map Turtle, is found only within the Edwards Plateau region of Central Texas. It makes its home with in the streams and tributaries of the Colorado River drainage area (Bartlett 1999; Ernst 1994; Smith 1952).

Biogeographic Regions: nearctic (Native )

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Trophic Strategy

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This species of turtle has a diet consisting of small mollusks, such as snails, and some local vegetation. In captivity, meats (fish, chicken, beef), dog food, insects, and at times lettuce are the recommended diet. Females, because of their larger head size, tend to be more carnivorous, while males are primarily omnivorous (Bartlett 1999; Ernst 1994; Line 1998).

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Fimbel, K. 2000. "Graptemys versa" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Graptemys_versa.html
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Benefits

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This genus as a whole has become extremely important in the pet trade market because of its species' beautiful markings. Graptemys sp. had an exporting price set at $2.52 (U.S currency) in 1993. In that same year, exports from the U.S. totaled $37, 233. Exact figures on Graptemys versa aren't available (Bartlett 1999; Amendments 1996).

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Benefits

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N/A

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Fimbel, K. 2000. "Graptemys versa" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Graptemys_versa.html
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Conservation Status

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The number of turtles in each species of Graptemys has declined in past years. Several factors have been found to contribute to this decline, including environmental changes (pollution, habitat reduction, etc.), predation, and pet trade. Graptemys versa has had no state-regulated conservation program implemented. In 1996, however, a proposal was submitted to the Convention of International Trade of Endangered Species of World Fauna and Flora (U.S. Fish and Wildlife Service) for inclusion of all Graptemys sp. in Appendix II. Several other species in this genus have conservation programs at both the state and national levels (Amendments 1996; Bartlett 1999; Kirkpatrick 1993; Line 1998).

IUCN Red List of Threatened Species: lower risk - near threatened

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Reproduction

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It is believed that these turtles mate in both early spring and late fall. Head bobbing by males has been observed during mating season, although specific mating behaviors have yet to be described. Females come on shore to lay their eggs. They make their nests (usually several inches deep) along sandbars and other sandy areas that provide protection to the clutch. The female usually lays few eggs; six eggs have been the most known laid in any one clutch. The eggs hatch sixty-five to eighty-five days after being deposited. Hatchlings have not been readily observed in their natural habitat. Sex determination in these turtles is temperature dependent. Generally, species within the Graptemys genus produce mostly males at temperatures lower than 28 degrees Celsius and mostly females at temperatures 30 degrees Celsius or above, although specific temperatures for G. versa have not been found. Karyotyping of this species has revealed that these turtles have 50 chromosomes: 12 pairs of microchromosomes, 11 pairs of metacentric, and 2 pairs of acrocentric macrochromosomes. This is a unique characteristic, because not all species within Graptemys share this number or arrangement of chromosomes (Bartlett 1999; Ernst 1994; Line 1998; White 1986).

Key Reproductive Features: gonochoric/gonochoristic/dioecious (sexes separate)

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Distribution

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Continent: North-America
Distribution: USA (C Texas: Colorado River watershed on the Edwards Plateau)
Type locality: œAustin, Texas [Travis County, Texas].
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Comprehensive Description

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Graptemys pseudogeographica versa Stejneger, 1925

[= Graptemys versa Stejneger, 1925; fide, Smith, 1948:60, Vogt, 1981:280.1]

Stejneger, 1925, J. Washington Acad. Sci. 15(20):463.

Holotype: USNM 27473 (alcoholic adult male, CL 87 mm, rear scute missing), collector unknown, Jul 1900, donated by Herbert H. and Clement S. Brimley.

Type Locality: “Austin, Texas” [Travis County, Texas].

Paratypes: USNM 27474 (alcoholic male, CL 89 mm); USNM 27475 (alcoholic male, CL 87 mm); USNM 27476 (alcoholic male, CL 85 mm); USNM 27477 (alcoholic male, CL 90 mm); USNM 27478 (alcoholic male, CL 95 mm); USNM 27479 (alcoholic male, CL 74 mm); and USNM 27480 (alcoholic specimen, exchanged, see “Remarks”); all collected at the type locality, collector unknown, Jul 1900.

Other Type Material: Paratype: MCZ 42346 (see “Remarks”).

Etymology: The name versa is from the Latin vers, to change; refers to its head pattern differing from that of Graptemys p. pseudogeographica.

Remarks: Paratype USNM 27480 was exchanged to the Museum of Comparative Zoology (MCZ 42346), 9 Dec 1936.
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Reynolds, Robert P., Gotte, Steve W., and Ernst, Carl H. 2007. "Catalogue of Type Specimens of Recent Crocodilia and Testudines in the National Museum of Natural History, Smithsonian Institution." Smithsonian Contributions to Zoology. 1-49. https://doi.org/10.5479/si.00810282.626

Texas-Höckerschildkröte ( German )

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Die Texas-Höckerschildkröte (Graptemys versa) ist eine im US-Bundesstaat Texas beheimatete Art aus der Gattung der Höckerschildkröten, die zur Familie der Neuwelt-Sumpfschildkröten gehört.

Erscheinungsbild

Die Texas-Höckerschildkröte ist die kleinste aller Höckerschildkröten. Die Weibchen haben eine Carapaxlänge von 12,5 bis 20 Zentimeter. Die Männchen werden auch ausgewachsen nur knapp halb so groß und haben eine Carapaxlänge von 6,5 bis 10 Zentimeter. Die Grundfarbe des Rückenpanzers ist oliv mit einer feinen, orange-gelben Linienfärbung auf jedem Hornschild. Der Dorsalkiel ist am auffälligsten bei Jungtieren, ist aber auch bei adulten Individuen sichtbar und hat eine dunkelgelbe Färbung. Der Bauchpanzer ist cremefarben und weist nur wenige Farbmarkierungen auf außer den dunklen Linien an den Rändern. Der Kopf ist schmal und die Schnauze läuft spitz zu. Die Haut von Kopf, Hals, Beinen und Schwanz weist ein gelbes und orange-farbenes Linienmuster auf. Männchen haben lange Schwänze und ältere Weibchen kann man an ihren breiteren Köpfen erkennen. Direkt hinter dem Auge findet sich eine auffällige, meist J-förmige Farbmarkierung, die zu den eindeutigen Erkennungsmerkmalen dieser Schildkrötenart zählt.

Verbreitung und Lebensraum

Die Texas-Höckerschildkröte ist mit ihrem Verbreitungsgebiet auf eine verhältnismäßig kleine Region im US-Bundesstaat Texas begrenzt. Sie kommt nur auf dem Edwards Plateau im zentralen Texas vor und kommt dort im Colorado River und seinen Zuflüssen vor. Sie präferieren flache Wasserläufe mit moderater Fließbewegung und einem reichen Pflanzenbewuchs. Der Boden dieser Wasserläufe besteht entweder aus Sand, Lehm oder Kalkstein.

Lebensweise

Wie viele andere im Wasser lebende Schildkröten kann man sie häufig beim Sonnenbaden beobachten. Sie sind sehr scheu und tauchen bei der geringsten Andeutung von Gefahr wieder ins Wasser ein. Sie sind ausgezeichnete Schwimmer und fressen Muscheln und Pflanzen.

Die Paarungszeit dieser Höckerschildkrötenart steht nicht sicher fest. Vermutlich paaren sie sich im frühen Frühjahr und im späten Herbst. Die Weibchen graben ihre Nistgruben am liebsten an sandigen Stellen in der Nähe der Wasserläufe. Das durchschnittliche Gelege umfasst sechs Eier. Die Schlupfzeit der Jungschildkröten ist abhängig von der Umgebungstemperatur. In der Regel schlüpfen die Jungtiere nach 65 bis 85 Tagen.

Die Bestandszahlen aller Höckerschildkröten sind rückläufig. Das gilt auch für die Texas-Höckerschildkröte. Die Ursachen des Bestandsrückgangs sind vielfältig und reichen von Umweltverschmutzung bis zu einer zunehmenden Zerstörung des Lebensraumes.

Nachweise

Literatur

  • R. Babour, C. Ernest: Turtles of the United States. The University Press of Kentucky, Kentucky 1989.

Weblinks

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Texas-Höckerschildkröte: Brief Summary ( German )

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Die Texas-Höckerschildkröte (Graptemys versa) ist eine im US-Bundesstaat Texas beheimatete Art aus der Gattung der Höckerschildkröten, die zur Familie der Neuwelt-Sumpfschildkröten gehört.

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Texas map turtle

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The Texas map turtle (Graptemys versa) is a species of emydid turtle endemic to Texas.

Geographic range

Endemic to Texas within the Colorado River (Texas) drainage

Description

Graptemys versa is a smaller turtle; females only attain a carapace length of 21.4 cm (8.4 in). Males are even smaller, only attaining a carapace length of 9.0 cm (3.5 in). When viewed dorsally, the carapace is oval-shaped with the widest part just above the rear legs. The posterior marginals are serrated and the carapacial scutes are convex. A medial keel is present on the vertebral scutes with the most prominent keels being located on the first three. The apex of these scutes are yellowish but often become worn down with age. The base coloration of the carapace is olive green with yellow reticulations. Juveniles and young adults often bear some slight pattern along the central seams of the plastral scutes. However, some adults have a creamy yellow plastron free of markings.

Diet

Map turtle researcher Peter Lindeman has documented the following dietary items from Texas map turtles: Freshwater sponges, algae, seeds, Asian clams, various aquatic insects, leeches, and crayfish.

References

  1. ^ database.reptarium.cz/species.php?genus=Graptemys&species=versa Graptemys versa, Reptile Database
  2. ^ Fritz, Uwe; Peter Havaš (2007). "Checklist of Chelonians of the World" (PDF). Vertebrate Zoology. 57 (2): 190. Archived from the original (PDF) on 1 May 2011. Retrieved 29 May 2012.
  3. ^ Conant, R. 1975. A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition Houghton Mifflin. Boston. xviii + 429 pp. + 48 plates. ISBN 0-395-19979-4 (hardcover), ISBN 0-395-19977-8 (paperback). (Graptemys versa, p. 58 + Plate 8 + Map 21.)
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Texas map turtle: Brief Summary

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The Texas map turtle (Graptemys versa) is a species of emydid turtle endemic to Texas.

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Graptemys versa ( Basque )

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(RLQ=window.RLQ||[]).push(function(){mw.log.warn("Gadget "ErrefAurrebista" was not loaded. Please migrate it to use ResourceLoader. See u003Chttps://eu.wikipedia.org/wiki/Berezi:Gadgetaku003E.");});
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Graptemys versa: Brief Summary ( Basque )

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Graptemys versa Graptemys generoko animalia da. Narrastien barruko Emydidae familian sailkatuta dago.

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Graptemys versa ( French )

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Graptemys versa est une espèce de tortue de la famille des Emydidae[1].

Répartition

Cette espèce est endémique du Texas aux États-Unis[1]. Elle se rencontre dans le bassin de la Colorado River sur le Plateau d'Edwards.

Alimentation

Les mâles et les juvéniles se nourrissent principalement d'insectes et d'autres invertébrés. Les femelles se nourrissent principalement de mollusques[2].

Publication originale

  • Stejneger, 1925 : New species and subspecies of American turtles. Journal of the Washington Academy of Science, vol. 15, no 20, p. 462-463 (texte intégral).

Notes et références

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Graptemys versa: Brief Summary ( French )

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Graptemys versa est une espèce de tortue de la famille des Emydidae.

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Graptemys versa ( Italian )

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La tartaruga geografica del Texas (Graptemys versa Stejneger, 1925) è una tartaruga acquatica della famiglia degli emididi.

Descrizione

Le dimensioni variano a seconda del sesso: in esemplari adulti possono andare da 8 a 10 cm per i maschi, da 12 a 15 cm per le femmine, ma in cattività difficilmente raggiungono tali dimensioni.

Distribuzione e habitat

In natura vivono nei fiumi e nei laghi del sud est degli Stati Uniti, più nello specifico nella zona centrale del Texas.

Comportamento

Si tratta di tartarughe acquatiche che raramente si avventurano sulla terraferma se non per la deposizione delle uova.

Sono animali diurni e sono attivi dalla primavera all'autunno. Con l'abbassarsi delle temperature, verso ottobre, rallentano il loro metabolismo e cadono in letargo sul fondo fangoso del corso d'acqua dove vivono. Con l'arrivo della primavera riacquistano pian piano la loro attività e verso la fine di maggio inizia la stagione degli accoppiamenti.

Verso luglio le femmine depongono la prima volta; si calcolano, in media, tre deposizioni l'anno per un totale di uova che si aggira intorno a 30.

Gli individui maschili risultano essere sessualmente attivi già a partire dal secondo anno di vita, mentre quelli femminili intorno al terzo anno.

Allevamento

Riscuote sempre più ampi consensi da parte degli appassionati in quanto si tratta della specie che raggiunge, una volta adulta, le dimensioni più piccole tra tutte le tartarughe del genere Graptemys e quindi risulta di facile allevamento all'interno di terracquari. Proprio per questo motivo è comparsa sul mercato sostituendo sempre più le sue "cugine" che hanno dimensioni di gran lunga maggiori.

Note

  1. ^ (EN) van Dijk, Peter Paul, 2011, Graptemys versa, su IUCN Red List of Threatened Species, Versione 2020.2, IUCN, 2020.

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Graptemys versa: Brief Summary ( Italian )

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La tartaruga geografica del Texas (Graptemys versa Stejneger, 1925) è una tartaruga acquatica della famiglia degli emididi.

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Graptemys versa ( Malay )

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Graptemys versa juga dikenali sebagai Kura-kura Peta Texas ialah spesies kura-kura dari keluarga Emydidae yang berasal dari selatan Amerika Syarikat. Haiwan ini semakin popular dijadikan peliharaan dan populasinya semakin bertambah.

Taburan habitat

Kura-kura ini dijumpai di tengah Texas terutamanya di Sungai Colorado, iaitu di dataran tinggi Edwards.

Ciri-ciri

Graptemys versa ialah antara kura-kura peta terkecil; kura-kura betina bersaiz 12.5 cm (5.0 in).[3] Jantan pula lebi kecil, iaitu sekitar 9.0 cm (3.5 in).[4] Lunas pada belakang cangkerangnya tidak berwarna hitam, dan terdapat bentuk J pada kepalanya yang jelas kelihatan.

Diet

Makanan utamanya terdiri daripada moluska, serangga, udang kecil, dan tumbuh-tumbuhan.

Rujukan

  1. ^ database.reptarium.cz/species.php?genus=Graptemys&species=versa Graptemys versa[pautan putus], Reptile Database
  2. ^ Fritz, Uwe; Peter Havaš (2007). "Checklist of Chelonians of the World" (PDF). Vertebrate Zoology. 57 (2): 190. Diarkibkan daripada asal (PDF) pada 17 December 2010. Dicapai 29 May 2012.
  3. ^ a b Conant, R. 1975. A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition Houghton Mifflin. Boston. xviii + 429 pp. + 48 plates. ISBN 0-395-19979-4 (hardcover), ISBN 0-395-19977-8 (paperback). (Graptemys versa, p. 58 + Plate 8 + Map 21.)
  4. ^ Smith, H.M., and E.D. Brodie, Jr. 1982. Reptiles of North America: A Guide to Field Identification. Golden Press. New York. 240 pp. ISBN 0-307-13666-3. (Graptemys versa, pp. 50-51.)

Bacaan lanjut

  • Stejneger, L. 1925. New species and subspecies of American turtles. Journ. Washington Acad. Sci. 15 (20): 462-463. ("Graptemys pseudogeographica versa, new subspecies", p. 463.)

Pautan luar


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Graptemys versa: Brief Summary ( Malay )

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Graptemys versa juga dikenali sebagai Kura-kura Peta Texas ialah spesies kura-kura dari keluarga Emydidae yang berasal dari selatan Amerika Syarikat. Haiwan ini semakin popular dijadikan peliharaan dan populasinya semakin bertambah.

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Graptemys versa ( Dutch; Flemish )

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Herpetologie

Graptemys versa is een schildpad uit de familie moerasschildpadden (Emydidae).[1] De soort werd voor het eerst wetenschappelijk beschreven door Leonhard Hess Stejneger in 1925. Later werd de wetenschappelijke naam Graptemys pseudogeographica versa gebruikt.

Uiterlijke kenmerken

De schildpad bereikt een maximale schildlengte tot ongeveer 21 centimeter. De kleur van het schild is bruin, het rugschild heeft een opvallende nettekening van gele lijnen. De kop en poten zijn bruin van kleur en hebben een gele lijnentekening.[2]

Verspreiding en habitat

Graptemys versa komt endemisch voor in de Verenigde Staten, en alleen in de staat Texas. De habitat bestaat uit kleinere, ondiepe wateren.[2]

Bronvermelding

Referenties
  1. Peter Uetz & Jakob Hallermann, The Reptile Database – Graptemys versa.
  2. a b C.H. Ernst, R.G.M. Altenburg & R.W. Barbour, Turtles of the World.
Bronnen
  • (en) Peter Uetz & Jakob Hallermann - The Reptile Database – Graptemys versa - Website Geconsulteerd 21 mei 2015
  • (en) - Peter Paul van Dijk, John B. Iverson, Anders G. J. Rhodin, H. Bradley Shaffer & Roger Bour - Turtles of the World, 7th Edition: Annotated Checklist of Taxonomy, Synonymy, Distribution with Maps, and Conservation Status - ISSN 10887105 (2014) - Website
  • (en) C.H. Ernst, R.G.M. Altenburg & R.W. Barbour - Turtles of the World - Website
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Graptemys versa: Brief Summary ( Dutch; Flemish )

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Graptemys versa is een schildpad uit de familie moerasschildpadden (Emydidae). De soort werd voor het eerst wetenschappelijk beschreven door Leonhard Hess Stejneger in 1925. Later werd de wetenschappelijke naam Graptemys pseudogeographica versa gebruikt.

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Graptemys versa ( Swedish )

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Graptemys versa[2] är en sköldpaddsart som beskrevs av Leonhard Hess Stejneger 1925. Graptemys versa ingår i släktet Graptemys och familjen kärrsköldpaddor.[3][4] IUCN kategoriserar arten globalt som livskraftig.[1] Inga underarter finns listade i Catalogue of Life.[3]

De största honor har en 21,4 cm lång sköld och hos de största hannar är skölden 11,5 cm lång.[1]

Arten förekommer i centrala Texas i USA vid Coloradofloden och i andra delar av flodens avrinningsområde. Den vistas i dessa delar av floden som har en rik vattenvegetation. Dessutom besöks korvsjöar och andra insjöar.[1]

Olika insekter, andra ryggradslösa djur och troligen några växtdelar utgör födan åt hannar och ungdjur. Honor åt tidigare olika blötdjur. Efter att asiatiska musslor av släktet Corbicula introducerades blev dessa den främsta födan för honor. Under fyra tillfällen per år lägger honan 4 till 9 ägg. Nyfödda hannar blir efter två till tre år könsmogna. Honor behöver bli sju år gamla eller äldre innan de kan fortplanta sig. De har vid denna tidpunkt en 13 cm lång sköld.[1]

Källor

  1. ^ [a b c d e] 2011 Graptemys versa Från: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2 <www.iucnredlist.org>. Läst 2012-10-24.
  2. ^ [a b] Stejneger ,L.H. (1925) New species and subspecies of American turtles., Journ. Washington Acad. Sci. 15 (20): 462-463
  3. ^ [a b] Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.) (27 april 2011). ”Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist.”. Species 2000: Reading, UK. http://www.catalogueoflife.org/annual-checklist/2011/search/all/key/graptemys+versa/match/1. Läst 24 september 2012.
  4. ^ TIGR Reptile Database . Uetz P. , 2016 Graptemys versa


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Graptemys versa: Brief Summary ( Swedish )

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Graptemys versa är en sköldpaddsart som beskrevs av Leonhard Hess Stejneger 1925. Graptemys versa ingår i släktet Graptemys och familjen kärrsköldpaddor. IUCN kategoriserar arten globalt som livskraftig. Inga underarter finns listade i Catalogue of Life.

De största honor har en 21,4 cm lång sköld och hos de största hannar är skölden 11,5 cm lång.

Arten förekommer i centrala Texas i USA vid Coloradofloden och i andra delar av flodens avrinningsområde. Den vistas i dessa delar av floden som har en rik vattenvegetation. Dessutom besöks korvsjöar och andra insjöar.

Olika insekter, andra ryggradslösa djur och troligen några växtdelar utgör födan åt hannar och ungdjur. Honor åt tidigare olika blötdjur. Efter att asiatiska musslor av släktet Corbicula introducerades blev dessa den främsta födan för honor. Under fyra tillfällen per år lägger honan 4 till 9 ägg. Nyfödda hannar blir efter två till tre år könsmogna. Honor behöver bli sju år gamla eller äldre innan de kan fortplanta sig. De har vid denna tidpunkt en 13 cm lång sköld.

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Техаська мапова черепаха ( Ukrainian )

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Опис

Це найдрібніша черепаха свого роду. Спостерігається статевий диморфізм: самиці мають довжину карапаксу 12,5—20 см, самці їх менше вдвічі 5,5—10 см. У не статевозрілих особин чітко виражено кіль, у дорослих кіль темно-жовтого кольору. У самців довгі пружні хвости, у старих самиць голови більше, ніж у молодих.

Карапакс забарвлено у оливковий колір з помаранчево-жовтими лініями на кожному щитку. Пластрон кремовий, з темними мітками і лініями. Морда витягнута. Жовті та помаранчеві візерунки прикрашають голову, шию, кінцівки і хвіст. Примітною особливістю виду є помаранчева відмітна позаду очей, по якій цю черепаху можна відразу виділити серед споріднених особин.

Спосіб життя

Полюбляє річки та струмки. Ці черепахи воліють мілководдя з густими заростями водяних рослин на піщаних або глинястих берегах. Їх часто можна зустріти у воді або гріються в затишному місці на сонці. Техаська мапова черепаха чудово плаває та полюбляє приймати сонячні ванни. Дуже полохлива і при найменшому натяку на небезпеку тікає у воду. .

Харчується молюсками, равликами і водною рослинністю. Самиці внаслідок більшого розміру голови більше тяжіють до їжі тваринного походження, тоді як самці всеїдні.

Парування відбувається ранньою весною і пізньою осінню. Самці вступають в боротьбу через самиць, б'ючи один одного головами. Самиці виходять на берег відкласти яйця. Вони роблять ямки від 5 см в глибину і більше у піщаному ґрунті. У кладці 6 яєць. Інкубаційний період триває 65—85 днів. Стать новонароджених залежить від температури, при якій відбувалася інкубація. При температурі нижче 28 °C вилуплюються самці, а при 30 °C і вище — самиці.

Розповсюдження

Ендемічний вид штату Техас (США). Зустрічається на плато Едвардса у центральному Техасі.

Джерела

  • Stephens, P.R. & Wiens, J.J. 2003. Ecological diversification and phylogeny of emydid turtles. Biol. J. Linn. Soc. 79: 577–610
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Graptemys versa ( Vietnamese )

provided by wikipedia VI

Graptemys versa là một loài rùa trong họ Emydidae. Loài này được Stejneger mô tả khoa học đầu tiên năm 1925.[4]

Chú thích

  1. ^ database.reptarium.cz/species.php?genus=Graptemys&species=versa Graptemys versa, Reptile Database
  2. ^ Fritz, Uwe; Peter Havaš (2007). “Checklist of Chelonians of the World”. Vertebrate Zoology 57 (2): 190. Bản gốc (PDF) lưu trữ ngày 17 tháng 12 năm 2010. Truy cập ngày 29 tháng 5 năm 2012. Chú thích sử dụng tham số |coauthors= bị phản đối (trợ giúp)
  3. ^ Conant, R. 1975. A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition Houghton Mifflin. Boston. xviii + 429 pp. + 48 plates. ISBN 0-395-19979-4 (hardcover), ISBN 0-395-19977-8 (paperback). (Graptemys versa, p. 58 + Plate 8 + Map 21.)
  4. ^ Graptemys versa”. Truy cập ngày 1 tháng 6 năm 2013.

Tham khảo

Liên kết ngoài

 src= Phương tiện liên quan tới Graptemys versa tại Wikimedia Commons


Hình tượng sơ khai Bài viết liên quan đến rùa này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
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Graptemys versa: Brief Summary ( Vietnamese )

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Graptemys versa là một loài rùa trong họ Emydidae. Loài này được Stejneger mô tả khoa học đầu tiên năm 1925.

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德州地圖龜 ( Chinese )

provided by wikipedia 中文维基百科
二名法 Graptemys versa
Stejneger, 1925[1]

德州地圖龜英語Texas map turtle學名Graptemys versa) 是地圖龜屬下的一種,只生活在美國德克薩斯州愛德華茲高原科羅拉多河流域內。

描述

德州地圖龜是一種小型地圖龜,雌性個體背殼僅長達12.5厘米(4.9英寸),[3] 雄性更只有9厘米(3.5英寸)。[4]

參考文獻

  1. ^ Graptemys versa, Reptile Database
  2. ^ Fritz, Uwe; Peter Havaš. Checklist of Chelonians of the World (PDF). Vertebrate Zoology. 2007, 57 (2): 190 [29 May 2012]. (原始内容 (PDF)存档于2010-12-17). 引文使用过时参数coauthors (帮助)
  3. ^ 3.0 3.1 Conant, R. 1975. A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition Houghton Mifflin. Boston. xviii + 429 pp. + 48 plates. ISBN 0-395-19979-4 (hardcover), ISBN 0-395-19977-8 (paperback). (Graptemys versa, p. 58 + Plate 8 + Map 21.)
  4. ^ Smith, H.M., and E.D. Brodie, Jr. 1982. Reptiles of North America: A Guide to Field Identification. Golden Press. New York. 240 pp. ISBN 0-307-13666-3. (Graptemys versa, pp. 50-51.)
  • Stejneger, L. 1925. New species and subspecies of American turtles. Journ. Washington Acad. Sci. 15 (20): 462-463. ("Graptemys pseudogeographica versa, new subspecies", p. 463.)
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德州地圖龜: Brief Summary ( Chinese )

provided by wikipedia 中文维基百科

德州地圖龜(英語:Texas map turtle,學名:Graptemys versa) 是地圖龜屬下的一種,只生活在美國德克薩斯州愛德華茲高原科羅拉多河流域內。

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テキサスチズガメ ( Japanese )

provided by wikipedia 日本語
テキサスチズガメ テキサスチズガメ
テキサスチズガメ Graptemys versa
保全状況評価[a 1][a 2] LEAST CONCERN
(IUCN Red List Ver.3.1 (2001))
Status iucn3.1 LC.svgワシントン条約附属書III類
アメリカ合衆国分類 : 動物界 Animalia : 脊索動物門 Chordata 亜門 : 脊椎動物亜門 Vertebrata : 爬虫綱 Reptilia : カメ目 Testudines 亜目 : 潜頸亜目 Cryptodira 上科 : リクガメ上科 Testudinoidea : ヌマガメ科 Emydidae 亜科 : アミメガメ亜科 Deirochlyinae : チズガメ属 Graptemys : テキサスチズガメ G. versa 学名 Graptemys versa
Stejneger, 1925 和名 テキサスチズガメ 英名 Texas map turtle

テキサスチズガメ学名Graptemys versa)は、ヌマガメ科チズガメ属に分類されるカメ

分布[編集]

アメリカ合衆国(テキサス州のコロラド川水系)[1]固有種

形態[編集]

最大甲長21.4センチメートル[1]。背甲は扁平[1]。オスよりもメスの方が大型になり、オスは甲長6.5-11センチメートル[1]。背甲の前部にある甲板は盛り上がる[1]椎甲板の中央に筋状の盛り上がり(キール)があるが、瘤状にならない[1]背甲の色彩は暗黄色で、黄色い網目状の斑紋とその中に同心円状の斑紋が入る[1]。腹甲の色彩は黄色や淡黄色で、甲板の継ぎ目(シーム)は暗色[1]

頭部は属内ではやや小型で、吻端はやや突出する。頭部や四肢の色彩は暗黄色で、黄色や橙色の筋模様が入る[1]。眼には暗色の筋模様が入る[1]。眼後部にアルファベットの逆「J」字状の斑紋もしくは横縞が左右に1つずつ入る[1]

生態[編集]

基底石灰石でやや水深が浅い河川に生息する[1]昼行性[1]日光浴を行うことを好む[1]

人間との関係[編集]

ペットとして飼育されることもあり、日本にも輸入されていた。流通量は少なく、価格も属内では高価だった[1]2006年にチズガメ属がワシントン条約附属書III類に掲載されたためアメリカ合衆国からの輸出が制限され流通量は激減している。

参考文献[編集]

[ヘルプ]
  1. ^ a b c d e f g h i j k l m n o 安川雄一郎 「チズガメ属の分類と生活史(後編)」『クリーパー』第17号、クリーパー社、2003年、8-10、43頁。
  • 海老沼剛 『爬虫・両生類ビジュアルガイド 水棲ガメ1 アメリカ大陸のミズガメ』、誠文堂新光社2005年、19頁。
  • 千石正一監修 長坂拓也編 『爬虫類・両生類800種図鑑 第3版』、ピーシーズ、2002年、216頁。

関連項目[編集]

 src= ウィキスピーシーズにテキサスチズガメに関する情報があります。

外部リンク[編集]

  1. ^ CITES homepage
  2. ^ The IUCN Red List of Threatened Species
    • Tortoise & Freshwater Turtle Specialist Group 1996. Pseudemys rubriventris. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4.
執筆の途中です この項目は、動物に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めていますPortal:生き物と自然プロジェクト:生物)。
 title=
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テキサスチズガメ: Brief Summary ( Japanese )

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テキサスチズガメ(学名:Graptemys versa)は、ヌマガメ科チズガメ属に分類されるカメ

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