Leptochela carinata Ortmann 1893

Leptochela (Proboloura) carinata Ortmann

Leptochela carinata Ortmann, 1893:41 [part], pl. 4: fig. 1.— Rathbun, 1901:127.—Schmitt, 1935:134.—Hayashi and Miyake, 1969:6, fig. 3.—Chace, 1972:16.

DIAGNOSIS.—Rostrum with dorsal margin usually convex, occasionally straight or even concave. Carapace with 3 longitudinal dorsal ridges in breeding females only. Orbital margin entire, not serrate, with mesially directed tooth on ventral margin; suborbital angle unarmed. Fifth abdominal somite with dorsal carina elevated into 4 teeth, anterior 2 very prominent, posteriormost forming blunt projection on posterior margin. Telson with 2 pairs of dorsolateral spines in addition to anterior mesial pair; posterior margin without pair of minute mesial spines in addition to usual 5 pairs of prominent spines. Antennal scale usually more than 2/5 as long as carapace. First pereopod with 41 to 58 spines on opposable margin of movable finger. Third pereopod with exopod reaching nearly or quite as far as distal end of ischium. Endopod of 1st pleopod of male rounded distally, not produced distolaterally. Appendix masculina, not including spines, not overreaching appendix interna. Maximum carapace length 7.7 mm.

DESCRIPTION.—Rostrum (Figure 35a) with dorsal margin usually somewhat convex, occasionally straight or even concave, short, not overreaching basal segment of antennular peduncle. Carapace with median dorsal carina on anterior 1/3 to ½ of length but without paired dorsolateral carinae in males and nonbreeding females, dorsally tricarinate over most of length in breeding females. Orbital margin (Figure 35b) entire, not spinulose, but with mesially directed tooth on ventral portion; suborbital angle rounded.

Adbomen (Figure 35c) regularly rounded dorsally on 3 anterior somites and at least all but posterior 1/3 of 4th. Fifth somite sharply carinate, carina produced into 2 prominent acute anterior teeth and 2 low blunt teeth, posteriormost on posterior margin of somite. Sixth somite about 1½ times as long as high, with movable lappet sub-triangular (broadening distally) (Figure 35d), comparatively short spine (Figure 35e) on ventrolateral margin, and acute, sometimes rather obscure tooth on posterodorsal margin of posterolateral lobe. Telson (Figure 35f), not including posterior spines, about 1.6 times as long as 6th somite, less than 3 times as long as wide, margins noticeably sinuous, armed with 3 pairs of long spines, 1 pair anteromesial, 2 pairs dorsolateral, anterior pair of latter nearly in line with anteromesial pair, posterior pair arising at about midlength of telson; posterior margin (Figure 35g) with indistinct lobe (Figure 35h) but without pair of minute spines between bases of mesial pair of usual 5 pairs of prominent spines.

Eye with papilla on mesial surface of stalk proximal to cornea, cornea distinctly wider than stalk.

Antennular peduncle (Figure 36a) with stylocerite considerably overreaching basal segment; 2nd segment subequal to distal segment in mesial aspect but distinctly shorter in dorsal aspect.

Antennal scale (Figure 36b) 0.7 to 0.9 times as long as carapace, 4.0 to 5.0 times as long as wide, both lateral and mesial margins nearly straight, latter continuous with distal spine without any indication of subdistal shoulder. Distal segments of antennal peduncle little more than ½ as wide as scale, reaching to about middle 1/3 of scale; basal segment with prominent ventral spine.

Mouthparts as illustrated (Figures 36c-h). Third maxilliped (Figure 36h) overreaching antennal scale, distal segment about 2/3 as long as penultimate segment.

First pereopod (Figure 36i) overreaching antennal scale by slightly more or, usually, less than length of fingers; fingers 1.0 to 1.2 times as long as palm; dactyl (Figure 36j) armed with 41 to 58 spines on opposable margin. Second pereopod (Figure 36k) rarely overreaching antennal scale by more than length of fingers; fingers 1.1 to 1.3 times as long as palm; dactyl (Figure 36l) armed with 43 to 66 spines on opposable margin. Third pereopod (Figure 36m) overreaching extreme anterior margin of carapace by length of dactyl and about ½ of propodus; exopod reaching nearly or quite as far as distal end of ischium; ischium armed with row of about 4 spines near extensor margin and about 6 on flexor margin; merus with 5 spines near extensor margin and 9 to 11 on flexor margin; dactyl shorter than propodus. Fourth pereopod (Figure 36n) reaching to middle 1/3 of ischium of 2nd pereopod when both are extended anteriorly; ischium armed with several stout spines on semicircular anterior lobe; similar spines on flexor margins of merus, carpus, and propodus; dactyl shorter than propodus. Fifth pereopod (Figure 36o) reduced, not more than 2/3 as long as 4th pereopod, reaching barely to distal end of basis of 2nd pereopod when both are extended anteriorly, ischium and merus especially short; ischium armed distally with several stout spines; similar spines on flexor margins of merus, carpus, and propodus; dactyl very small, considerably shorter than propodus.

Endopod of 1st pleopod of male (Figure 37a,b) truncately rounded distally, lateral margin not flared distally. Appendix masculina (Figure 37c,d) bearing 7 long spines, not overreaching appendix interna, not including spines. Lateral branch of uropod (Figure 35f) armed with 14 to 22 spines.

SIZE.—Carapace lengths of males, 3.0–5.7 mm; of nonbreeding females, 2.4–7.7 mm; of ovigerous females, 4.3 and 6.7 mm.

MATERIAL.—GEORGES BANK. 41°22′N, 68°18′W, 35 m; 9 December 1955; 1-meter conical stramin net mounted on steel sled hauled along bottom; Albatross III Cruise 70, Collection 17 (R. L. Wigley): 1 ⁂ (3.0) Northeast Fisheries Center, Woods Hole, Massachusetts).

GULF OF MEXICO. Between Cape San Bias and Tampa Bay, Florida; 28°47′N, 83°42′W; 24 m; 1 February 1970; dredge; L. G. Abele: 1⁂ (5.7). Same; 28°3l′N, 84°16′W; 26 m; corraline rubble; 9 April 1970; Peterson grab; L. G. Abele: 1 9 (5.2). Anclote Light, Florida, E 7/8 N, 39.8 km; 23 m; rock, coral, and sand; 17.2°C; 28 March 1901 (10:30 a.m.);′dredge; Fish Hawk Sta. 7106: 2⁀ (4.4, 6.2). Between Marco and Dry Tortugas, Florida; 25°44′32″N, 82°37′15″W: 35 m; sand and coralline algae; 10 March 1889; hand dredge; Grampus Sta. 5084: 2 5 (6.7, 7.7) (1 ovig. (6.7)).

BAHAMAS. Rum Cay; surface; 1886; Albatross: 2 (5.2, 5.7)2 (5.3,5.5).

PUERTO RICO. Off Isla de Vieques; San Juan lighthouse NW 1/8 N 27.3 km; 20 m; coral, sand, and shells; 8 February 1899; tangle; Fish Hawk Sta. 6084: 1 (3.2). Same; Point Mula lighthouse SSW 3/8 W 10.6 km; 26 m; coral and sand; 8 February 1899; 7-foot beam trawl; Fish Hawk Sta. 6085: 1 (4.0). Same; Point Mula lighthouse E 1/2 N 20.8 km; 11 m; coral; 8 February 1899; tangle; Fish Hawk Sta. 6096: 1 ovig (4.3). Off Isla de Culebra; Culebritas lighthouse NE 9.7 km; 27 m; coral; 8 February 1899; tangle; Fish Hawk Sta. 6093: 1 (4.3). Same; Canal de Luis Peña; 25 February 1933; 8-foot circular net under cargo light; Johnson-Smithsonian Deep-sea Expedition: 1 (2.4).

HABITAT.—In depths of 11 to 35 meters on bottoms of coral and sand, as well as coralline algae, rocks, and shells. Although 11 of the 16 specimens examined were apparently taken on or near the bottom with dredges, a beam trawl, a plankton net, a Peterson grab, and tangles, the lot of four specimens from the Bahamas was collected at the surface, as was the single specimen taken by the Johnson-Smithsonian Expedition in Canal de Luis Pefia, Isla de Culebra. Also included among the material collected under a light at the latter station were three L. (L.) bermudensis and 27 L. (L.) serratorbita, so it is possible that L. (P.) carinata, which was taken at three bottom stations in that general area, is not especially photopositive.

TYPE-LOCALITY.—Off Baía de Marajó (“Küs-tenbank vor der Tocantins-Mündung”), Estado do Pará, Brazil, 50–100 meters.

DISTRIBUTION.—Georges Bank; Gulf of Mexico; Bahamas to Estado do Pará, Brazil, in depths of 11 to more than 50 meters.

Leptochela carinata Ortmann

Leptochela carinata Ortmann, 1893:41, pl. 4: fig. 1.

TYPE-LOCALITY.—Off Baía de Marajó, Estado do Pará, Brazil, 50–100 meters.

DISTRIBUTION.—Bahamas to Estado do Pará, Brazil; in depths of at least 51 meters.

*38. Leptochela serratorbita Bate

Leptochela serratorbita Bate, 1888:859, pl. 139: fig. 1.—Williams 1965b:41, fig. 33.

MATERIAL.—Barbuda (Sta. 84–56: 222 ; 200 [8 ovig.]).—Antigua Island (Sta. 93–58: 1 ).

HABITAT.—Coastal and inshore waters.

TYPE-LOCALITY.—Saint Thomas.

DISTRIBUTION.—North Carolina to Bay of Campeche and Antigua Island; possibly to 60 meters.