NEW BOPYRID ISOPOD CRUSTACEANS FROM DRY 



TORTUGAS, FLORIDA 



By A. S. Pearse 



Department of Zoology, Duke University, Durham, N. C. 



During the summer of 1981 two new species of bopyrids and an 

 undescribed male of one of Harriet Richardson's species were found 

 at Dry Tortugas, Fla. These are herewith described. 



BOPYRO, new genus 



Description. — Bopyridae : In the female the first four segments 

 of the abdomen are distinct and the last two partly fused. There 

 are no uropods and only four pairs of pleopods, which are more 

 or less cylindrical. The distal segment of the first lamella of the 

 marsupium is produced into a blunt, conical lobe. 



In the male the first three segments of the abdomen are distinct, 

 and the last three are fused into a trilobate terminal piece. There 

 are no uropods, and pleopods are absent or rudimentary. 



The genus differs from Pt'ohopynis in having free abdominal 

 segments in the male and fused abdominal segments in the female; 

 from Bopyriscus in having uniramous pleopods in the female; and 

 from Bopyrina in having distinct abdominal segments in the male. 



BOPYRO CHOPRAE, new species 



Figures 1-14 



This isopod is a parasite in the branchial cavitj' of Synalpheus 

 hrooksi Coutiere, which lives in the loggerhead sponge, Sp^ciospongia 

 vespara (Lamarck) Marshall, at Tortugas, Fla. 



Description. — Female : Body, asymmetrical, one side longer than 

 the other; longer than wide, 6.2 mm. by 4.3 mm. Head deeply 

 set in thorax, twice as wide as long, produced into an obtuse process 

 at the anterior angle, with front slightly elevated near middle. 

 Eyes placed near the lateral margins of the head, small, irregular. 

 Fii*st antennae small, 3-segmented. Second antennae shorter than 

 first, 2-segmented. The seven thoracic segments are distinct. The 

 lateral margins of first four are bilobate. All bear lamellar epim- 

 eral plates along one margin. Seven pairs of subchelate peraeo- 



No. 2924.— Proceedings U. S. National Museum, Vol. 81, Art. I. 



101485 — 32 1 



