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Neoechinorhynchidae is a family of parasitic worms from the order Neoechinorhynchida.[2]


Neoechinorhynchidae contains 4 subfamilies: Atactorhynchinae Petrochenko, 1956, Eocollinae Petrochenko, 1956, Gracilisentinae Petrochenko, 1956, Neoechinorhynchinae Ward, 1917.[a]


The genus Mayarhynchus Pinacho-Pinacho, Hernández-Orts, Sereno-Uribe, Pérez-Ponce de León & García-Varela, 2017 is different from the other 17 genera in Neoechinorhynchidae by having a small proboscis. It has nine longitudinal rows of five hooks each, totaling 45 to 46 relatively weak rooted hooks.[3]

  • Mayarhynchus karlae Pinacho-Pinacho, Hernández-Orts, Sereno-Uribe, Pérez-Ponce de León & García-Varela, 2017[3]

M. karlae has a small proboscis with nine longitudinal rows of five hooks each, totaling 45 to 46 relatively weak rooted hooks and a proboscis receptacle is nearly cylindrical and contains a single layered wall. The worm has a short trunk with a body wall containing five dorsal and one ventral giant hypodermal nuclei. The lemnisci are broad and flat with large nuclei. In the male, the testes are in tandem, and the cement gland has eight large nuclei. In the female, the eggs are oval. Phylogenetic analysis has been conducted based on the cox1 gene, and the 28S ribosomal RNA gene were conducted to compare with other species of Neoechinorhynchidae, confirming its correct family, however it determined that Neoechynorhynchus is not monophyletic.[3]

Atactorhynchinae Petrochenko, 1956

Atactorhynchus Chandler, 1935

  • Atactorhynchus duranguensis Salgado-Maldonado, Aguilar-Aguilar and Cabañas-Carranza, 2005

A. duranguensis has been found in the intestine of the Mezquital pupfish (Cyprinodon meeki) a fish from in-land Mexico. Diagnostic features include: body small, stout, ventrally curved; small cylindrical proboscis armed with 16 alternating vertical rows of four or five hooks; anterior two or three hooks conspicuous, stout and larger than other hooks, and have large, rod-shaped roots with a markedly and abruptly enlarged base; three posterior hooks of each row are smaller and rootless; single-walled proboscis receptacle; lemnisci equal in length, elongate and robust; and cement gland syncytial, larger than testis. The new species is smaller than A. verecundus with smaller hook lengths and slightly smaller proboscis. A. duranguensis is also shaped differently: it has a proboscis shape that is not widest at the apex, and the greatest width of the trunk is in about the middle contrasting A. verecundus where the trunk is widest posteriorly, and the proportion of large apical proboscis hooks in relation to the small basal hooks is different: the basal hooks of A. verecundus are about half the size of the anterior hooks and but only about a quarter of the size in A. duranguensis. Unlike A. verecundus, the base of the roots are markedly and abruptly enlarged in the new species. Finally, the eggs of the new species are smaller (23-27 x 8-10 um) than those of A. verecundus (27-30 x 12-13 um).[4]

  • Atactorhynchus verecundus Chandler, 1935


  • Floridosentis mugilis (Machado-Filho, 1951)
  • Floridosentis pacifica Bravo-Hollis, 1969


  • Tanaorhamphus longirostris (Van Cleave, 1913)

Eocollinae Petrochenko, 1956

Eocollis Van Cleve, 1947

  • Eocollis arcanus Van Cleve, 1947
  • Eocollis catostomi Buckner, 1992
  • Eocollis harengulae Wang, 1981

Gracilisentinae Petrochenko, 1956

Gracilisentis Van Cleave, 1919

  • Gracilisentis gracilisentis (Van Cleave, 1913)
  • Gracilisentis mugilis Gupta and Lata, 1967
  • Gracilisentis sharmai (Gupta and Lata, 1967)
  • Gracilisentis variabilis (Diesing, 1856)

Pandosentis Van Cleve, 1920

  • Pandosentis iracundus Van Cleve, 1920
  • Pandosentis napoensis Smales, 2007

Wolffhugelia Mane-Garzon and Dei-Cas, 1974

  • Wolffhugelia matercula Mane-Garzon and Dei-Cas, 1974

Neoechinorhynchinae Ward, 1917


Neoechinorhynchidae species parasitize fish.


  1. ^ A binomial authority in parentheses indicates that the species was originally described in a genus other than the present genus.
  2. ^ The genus Neoechinorhynchus has two subgenera: Hebesoma and Neoechinorhynchus


  1. ^ Amin, Omar Mohamed; Heckmann, Richard Anderson; Ha, Nguyen Van (2014). "Acanthocephalans from fishes and amphibians in Vietnam, with descriptions of five new species". Parasite. 21: 53. doi:10.1051/parasite/2014052. ISSN 1776-1042. PMC 4204126. PMID 25331738. open access
  2. ^ Encyclopedia of Life www.eol.org
  3. ^ a b c Pinacho-Pinacho, Carlos D.; Hernández-Orts, Jesús S.; Sereno-Uribe, Ana L.; Pérez-Ponce De León, Gerardo; García-Varela, Martín (2017). "Mayarhynchus karlae n. G., n. Sp. (Acanthocephala: Neoechinorhynchidae), a parasite of cichlids (Perciformes: Cichlidae) in southeastern Mexico, with comments on the paraphyly of Neoechynorhynchus Stiles & Hassall, 1905". Systematic Parasitology. 94 (3): 351–365. doi:10.1007/s11230-017-9704-x. PMID 28238044. S2CID 3542674.
  4. ^ Salgado-Maldonado, Guillermo & Aguilar-Aguilar, Rogelio & Cabañas-Carranza, Guillermina. (2005). Atactorhynchus duranguensis n. sp (Acanthocephala : Atactorhynchinae) from Cyprinodon meeki (Pisces : Cyprinodontidae) near Durango, Mexico. Systematic parasitology. 60. 205-9. 10.1007/s11230-004-6349-3.
  5. ^ Amin, Omar M.; Chaudhary, Anshu; Heckmann, Richard; Ha, Nguyen V.; Singh, Hridaya S. (2019). "Redescription and molecular analysis of Neoechinorhynchus (Neoechinorhynchus) johnii Yamaguti, 1939 (Acanthocephala, Neoechinorhynchidae) from the Pacific Ocean off Vietnam". Parasite. 26: 43. doi:10.1051/parasite/2019041. ISSN 1776-1042. PMC 6650202. PMID 31335314.
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Neoechinorhynchidae: Brief Summary

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Neoechinorhynchidae is a family of parasitic worms from the order Neoechinorhynchida.

Wikipedia authors and editors
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