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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.

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