Abstract
Several expeditions in recent years to Isla del Coco have increased the total number of species of fishes known from the island. Several of these species have been described as new endemics (Bussing 1983, 1990, 1991a, 1991b, 1997). During the 1972 R/V Searcher Expedition to Costa Rica several trawl collections were made around Isla del Coco. At five localities in depths between 110 and 180m, 86 specimens of a new species of Peristedion were taken and are described herein. A key to the four species of Eastern Pacific Peristedion is included.
Highlights
The armored searobins (Peristediidae) are usually found in waters greater than 100m
Differences in coloration and head serration exist between these two species
The Garman figure of P. crustosum is very similar to a remarkable photograph of a living specimen of Peristedion taken from the submersible Johnson Sea-link on a seamount off the Galápagos (Richards & McCosker 1998)
Summary
The armored searobins (Peristediidae) are usually found in waters greater than 100m. Their body is encased in four rows of spinous scutes on each side of the body and the wide snout is extended by a pair of flattened bony extensions. Galápagos crustosum 127.8 36.7 20.9 11.7 23.4 40.5 13.2 18.6 22.1 18.5 (S-526), 2.7km SSE off Cabo Dampier; collected with 30’ trawl, depth 120m, April 3, 1972; 05°28’30” N; 87°04’00” W; 41 specimens (51.5-116mm SL). LACM 32281.001 (S-541), 1.9km N of Isla Iglesias; collected with 15’ trawl, depth 128m, April 5, 1972; 05°34’21” N; 87°03’48” W; 1 specimen (72.5mm SL).
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