siiegid lene Nee arse okt 3 eer osteo “ Fo el gs ON * are Aatatyhetenie ty ais TON ae Ie ee —_— ong estan ar : neat — =. we erie CA Se eee iecieengipes sitar = = isa i sanaaane ats niin hal ora Ee = cigiee test. Zath = no 8 ARO what ee POL, . sarseatnl ete ae as re ead ada A SN " te sive xt " “ : : : PP re “ = sy pn Ea Aerete lysis, wie ts te cabeewt Ese ————— ee ° PRS Tee por career Orr Sean OE SO WC anne SET ee ea EE ALD PEM LIEN PY IE Pe eA BETES Re eS Wrte-. ~——~-_ » 3 = - ARNO ete ee wateery A aera 5 ae paceust Dee ee eprom tN eg. tenner eee Bel SVEN pA FOC Roe yest gine ee is - a wnt OAs FN orig weer wee Saar : - aah bak A eens Se n, Semmenal an — AMPHIPODA: OF THE PAMILY AMPELISCIDAE COLLECTED BY THE VELERO III IN THE CARIBBEAN SEA (Piates 1-2) By J. LauRENS BARNARD THE UNIVERSITY OF SOUTHERN CALIFORNIA PUBLICATIONS ALLAN Hancock ATLANTIC EXPEDITION REPORT NUMBER 7 IssUED AUGUST 23, 1954 PRICE 50¢ THE UNIVERSITY OF SOUTHERN CALIFORNIA PRESS Los ANGELES, CALIFORNIA AMPHIPODA OF THE FAMILY AMPELISCIDAE COLLECTED BY THE VELERO III IN THE CARIBBEAN SEA By J. Laurens BARNARD A small collection of ampeliscids was made by the Velero III during its journey to the Caribbean Sea in 1939. These few specimens are of interest primarily for comparison with the eastern Pacific ampeliscids reported earlier by Barnard (1954). With the exception of a species new to science, all of the representatives are also known from the eastern Pacific. The literature reveals no record of the genus 4 mpelisca from the Caribbean Sea proper, although Shoemaker (1933) reported 4. schellen- bergi from “off Yucatan.” Preliminary examination of several of the Caribbean species revealed types different from those of the eastern Pacific. This was due to the robustness of the forms and the presence of variations in shape of the third pleonal epimera and in ornamentation of the fourth pleonal segment. Comparison of these specimens with Pacific materials showed that these variations were not of sufficient divergency to warrant the publication of new names, since the two characters mentioned exhibit wide variability in the Ampeliscidae. A full account of the Velero III station records may be found in Garth (1945). The writer owes a debt of gratitude to the staff of the Allan Hancock Foundation for assistance and support in preparing this paper. ie) ALLAN HANCOCK ATLANTIC EXPEDITION REPORT Ampelisca schellenbergi Shoemaker A mpelisca schellenbergi Shoemaker, 1933, Amer. Mus. Nov., no. 598, pp. 3-5, fig. 2; Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 14-16, pls. 7, 8 (with synonymy). Remarks.—This species was described originally from Florida and off Yucatan. Material examined.—A56-39 (7). Distribution —Caledonia Bay, Panama, shoal. Ampelisca lobata Holmes Ampelisca lobata Holmes, 1908, Proc. U.S. Natl. Mus., vol. 35, no. 1654, pp. 517-518, fig. 25; Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 11-14, pls. 5, 6 (with synonymy). Material examined —A12a-39 (6), Al4-39 (1), A18-39 (29, the largest a female, 6 mm in length). Distribution—Eleven mi southwest of Cape la Vela, Colombia, 5 fms; 2 mi southwest of Cape la Vela, Colombia, 21-22 fms; 8 mi south- west of San Nicolaas Bay, Aruba, 23-24 fms. Ampelisca venetiensis Shoemaker A mpelisca venetiensis Shoemaker, 1916, Proc. Biol. Soc. Washington, vol. 29, pp. 158-159; Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 16-18, pl. 9. Remarks.—Of the three specimens and one fragment available, the largest specimen is a female, 15 mm in length. Material examined. —A14-39 (4). Distribution—Two mi southwest of Cape la Vela, Colombia, 21- 22 fms. No. 7 BARNARD: AMPELISCIDAE IN THE CARIBBEAN 3 Ampelisca romigi J. L. Barnard A mpelisca romigi Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 18-20, pls. 10, 11. Material examined.—A13-39 (11), Al14-39 (1), A18-39 (13, the largest a female, 8 mm in length). Distribution —One mi southwest of Cape la Vela, Colombia, 10-13 fms; 2 mi southwest of Cape la Vela, Colombia, 21-22 fms; 8 mi south- west of San Nicolaas Bay, Aruba, 23-24 fms. Ampelisca vera J. L. Barnard (Plate 1, figs. K, L) Ampelisca vera Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 23-26, pls. 14-16. Remarks.—The uropods of the specimens from A13-39 were slightly stouter than in the other materials examined. ‘Two variations in the carina of pleon segment 4 are figured. Material examined.—A13-39 (3), A14-39 (1), A53-39 (1). Distribution.—One mi southwest of Cape la Vela, Colombia, 10-13 fms; 2 mi southwest of Cape la Vela, Colombia, 21-22 fms; Caledonia Bay, Panama, 7-12 fms. Ampelisca cristata Holmes Ampelisca cristata Holmes, 1908, Proc. U.S. Natl. Mus., vol. 35, no. 1654, pp. 507-508, figs. 16, 17; Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 26-28, pls. 17, 18. Material examined.—A13-39 (1 male). Distribution —One mi southwest of Cape la Vela, Colombia, 10-13 fms. 4 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT Ampelisca cristata forma microdentata J. L. Barnard (Plate 1, figs. A-G) Ampelisca cristata forma microdentata Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 28-29, pls. 17, 18. Remarks.—In the accompanying figures are shown variations in the shape of the carina on pleon segment 4 and the third pleonal epimera. The third uropods of specimens from A24-39 were stouter than in other Caribbean specimens examined. Material examined.—A13-39 (2 and frags.), A15-39 (2), A18-39 (5), A24-39 (12), A32-39 (2), A42-39 (1), A44-39 (1). Distribution One mi southwest of Cape la Vela, Colombia, 10-13 fms; 2 mi off Bahia Honda, Colombia, 9-10 fms; 8 mi southwest of San Nicolaas Bay, Aruba, 23-24 fms; Cubagua Island, Venezuela, 2-5 fms; 3 mi north of Coche Island, Venezuela, 19-33 fms; 7 mi north of Mar- garita Island, Venezuela, 21-22 fms; 4 mi north of Tortuga Island, Venezuela, 21-22 fms. Ampelisca cristoides J. L. Barnard (Plate 1, figs. H-J) Ampbelisca cristoides Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 29-31, pls. 19, 20. Remarks.—Several variations in the keel-like carina of the fourth pleonal segment are shown in the figures. Otherwise, the specimens cor- respond with the type material of the species. Material examined. —A13-39 (4), A14-39 (5), A32-39 (1). Distribution—One mi southwest of Cape la Vela, Colombia, 10-13 fms; 2 mi southwest of Cape la Vela, Colombia, 21-22 fms; 3 mi north- west of Coche Island, Colombia, 19-33 fms. NO. 7 BARNARD: AMPELISCIDAE IN THE CARIBBEAN 5 Ampelisca pacifica Holmes Ampelisca pacifica Holmes, 1908, Proc. U.S. Natl. Mus., vol. 35, no. 1654, pp. 511-513, figs. 20-22; Barnard, 1954, Allan Hancock Paci- fic Expeds., vol. 18, no. 1, pp. 31-33, pls. 21-22. Material examined.—A4-39 (3), A52-39 (1). Distribution.—Caledonia Bay, Panama, 5-14 fms. Ampelisca parapanamensis, new species (Plate 2) Description of female—Head as long as first 3 body segments, lower front edge subparallel to upper edge; anterior edge slightly incised, upper pair of eyes behind upper edge of first antenna, lower pair at the lower front corner of head. Antenna 1 reaching to end of peduncle of antenna 2, first 3 articles successively slightly shorter. Antenna 2 about as long as first 7 body segments, article 5 of peduncle two thirds as long as 4. Mandible: spine row with 8 spines, article 3 of palp two thirds as long as 2. Maxilla 1: outer plate with 10 spines, article 2 of palp as wide as outer plate, apex armed with 5 spines, 4 cusps and 7 setae, outer edge lined with 5 setae. Maxilliped: rounded apex of inner plate armed with 3 spine teeth and several short setae, inner edge of outer plate with 10 spines, rounded apex with 3 setal spines, the outermost one plumose. Lower posterior edge of coxa 1 with a strong tooth, coxae 2-3 lack a tooth or slit. Gnathopod 1: article 6 two thirds as long as 5, hind margin slightly convex, article 7 one half as long as 6. Gnathopod 2: article 6 one half as long as 5, hind margin straight, article 7 one half as long as 6. Peraeopod 1: anterodistal end of article 4 slightly produced, article 7 as long as or slightly longer than 5 and 6 combined. 6 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT Peraeopod 2 similar to 1 but more setose. Peraeopod 3: article 5 with 2 sets of spines on posterior edge, article 6 with 3 spines on posterior edge. Peraeopod 4 similar to 3 but with 2 spines on posterior edge of article 6. Peraeopod 5: article 2 rather narrow, lower posterior edge straight, oblique, produced downward to joint between articles 4 and 5; article 4 longer than 3, posterior edge with a narrow, setose lobe; article 6 longer than 5, article 7 as long as 5. Uropod | reaching to end of uropod 2, rami about as long as peduncle, outer upper edge of peduncle not spinose, inner edge of inner ramus with 3 spines, outer edge with 1 spine; outer edge of outer ramus with 3 small spines on outer edge. Uropod 2: outer ramus shorter than inner, inner as long as peduncle, inner edge of inner and both edges of outer ramus spinose, outer edge of inner ramus with | spine, outer ramus with a long, subapical spine. Uropod 3: rami broadly lanceolate, inner longer than outer, with inner edge serrate, outer ramus setose on both margins. Telson slender, apices laterally notched, each with 2-3 spinules, dorsal surface of each lobe with a line of setae. Pleon segment 3: posterior edge of epimera slightly convex, lower posterior corner produced into a short, blunt tooth. Pleon segment 4 raised into a low, massive, straight-topped boss, nearly cristate at apex. Pleon segment 6 with well developed lateral crests. Male.——Unknown. T ypes.—Holotype, AHF No. 3916, female, 5 mm, with 6 paratypes. Type locality.—Station A25-39, Cubagua Island, Venezuela, shore, April 14, 1939. Material examined.—The types. Remarks.—This species is very closely related to A mpelisca panamen- sis Barnard (1954), differing from that species by the serrate inner mar- NO. 7 BARNARD: AMPELISCIDAE IN THE CARIBBEAN i gin of the inner ramus of the third uropod and the shape and armature of the telsonic lobes. It should be noted in Barnard’s key (1954, pp. 6-7) to the species of Ampelisca from the eastern Pacific, that the words “16” and “‘panamen- sis’ were interchanged inadvertently. Ampelisca brevisimulata J. L. Barnard Ampelisca brevisimulata Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 33-35, pls. 23, 24. Material examined.—A13-39 (3), Al4-39 (1), A24-39 (1 female, 14 mm in length), A27-39 (5), A32-39 (1), A42-39 (6). Distribution —One mi southwest of Cape la Vela, Colombia, 10-13 fms; 2 mi southwest of Cape la Vela, Colombia, 21-22 fms; Cubagua Island, Venezuela, 2-5 fms; 3 mi north of Coche Island, Venezuela, 19- 33 fms; 7 mi north of Margarita Island, Venezuela, 17-22 fms. Ampelisca mexicana J. L. Barnard Ampelisca mexicana Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 45-46, pls. 31, 32. Material examined.—A4-39 (1). Distribution.—Caledonia Bay, Panama, 8-14 fms. Ampelisca pugetica Stimpson Ampelisca pugetica Stimpson, 1864, Proc. Acad. Nat. Sci., Philadelphia, vol. 16, pp. 158-159; Barnard, 1954, Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 49-51, pls. 35, 36 (with synonymy). Material examined.—A13-39 (3), A18-39 (1), A42-39 (12, the largest a female, 16 mm in length). Distribution.—One mi southwest of Cape la Vela, Colombia, 10-13 fms; 8 mi southwest of San Nicolaas Bay, Aruba, 23-24 fms; 7 mi north of Margarita Island, Venezuela, 17-22 fms. 8 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT LITERATURE CITED BARNARD, J. L. 1954. Amphipoda of the family Ampeliscidae collected in the eastern Pacific Ocean by the Velero III and Velero IV. Allan Hancock Pacific Expeds., vol. 18, no. 1, pp. 1-137, pls. 1-38. GarTH, J. S. 1945. Geographical account and station records of Velero III in Atlantic waters in 1939. Allan Hancock Atlantic Exped., Rpt. No. 1, pp. 1-106, pls. 1-28, charts 1-10. HoiMgs, S. J. 1908. The Amphipoda collected by the U. S. Bureau of Fisheries Steamer “Albatross” off the west coast of North America, in 1903 and 1904, with descriptions of a new family and several new genera and species. Proc. U. S. Natl. Mus., vol. 35, pp. 489-543, 46 text-figs. SHOEMAKER, C. R. 1916. Descriptions of three new species of amphipods from southern Cali- fornia. Proc. Biol. Soc. Wash., vol. 29, pp. 157-160. 1933. Amphipoda from Florida and the West Indies. Amer. Mus. Novitates, no. 598, 24 pp., 13 text-figs. STIMPson, W. 1864. Descriptions of new species of marine Invertebrata from Puget Sound, collected by the naturalists of the North-West Boundary Commission, A. H. Campbell, Esq., Commissioner. Proc. Acad. Nat. Sci. Phila., vol. 16, pp. 153-161. PEATES 10 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT PLATE 1 Ampelisca cristata forma microdentata J. L. Barnard Figs. A-C. Lower corner of third pleonal epimera. A. Female, 9.5 mm, Station A24-39. B. Female, 8.0 mm, Station A24-39. C. Female, 10.5 mm, Station A44-39. Figs. D-G. Carina of pleonal segment 4. D. Female, 9.0 mm, Station A15-39. E. Female, 10.5 mm, Station A44-39. F. Female, 12.5 mm, Station A18-39. G. Female, 11.0 mm, Station A32-39. Ampelisca cristoides J. L. Barnard Figs. H-J. Carina of pleonal segment 4. H. Female, 16.0 mm, Station A14-39. I. Female, 16.0 mm, Station A14-39. J. Female, 13.0 mm, Station A13-39. Ampelisca vera J. L. Barnard Figs. K, L. Carina of pleonal segment 4. K. Female, 14.0 mm, Station A13-39. L. Female, 9.5 mm, Station A13-39. NO. 7 BARNARD: AMPELISCIDAE IN THE CARIBBEAN PL 1 NW ALLAN HANCOCK ATLANTIC EXPEDITION REPORT PLATE 2 Ampelisca parapanamensis, new species Female, 5.0 mm, Station A25-39. Fig. A. Soa w Peraeopod 3. Head. . Telson. . Uropod 3, right. . Pleon segment 3 and urosome. . Peraeopod 5. tH fag 4 % fy 7 ) a ate ete a ee IRR py OO pt RR i Ee ee mae “ ua aan me ee