PEREZ FARFANTE: REVISION OF PENAEID SHRIMP GENVSPENAEOPSIS 



ryi], Alcock and Anderson (1894) stated (in the 

 account of the deep sea Crustacea collected in the 

 Bay of Bengal and Laccadive Sea by the Inves- 

 tigator during the seasons 1891-92 and 1893-94) 

 that they had little hesitation in identifying the 

 females with Bate's "Penaeus rectacutus," but 

 that the males "appear to agree in every detail 

 . . .with Spence Bate's figures and descriptions of 

 Penaeus serratus." Because the male "Penaeus 

 serratus" figured by Bate is a member oiPenaeop- 

 sis eduardoi, I assumed that the males available 

 to them belonged to the latter species. On the 

 basis of their statement that "M. rectacutus" was 

 common in the Bay of Bengal between 100 and 

 280 fm (183 and 357 m) and my noting the fact 

 that the stations established by the Investigator 

 during the years and within the depth limits cited 

 above were all located in the southwestern part of 

 the Bay of Bengal, I was led to the conclusion that 

 P. eduardoi had been found in the latter area. 

 Further studies, together with the fact that no 

 specimen of P. eduardoi has been reported west of 

 the Strait of Malacca, have inclined me to believe 

 that Alcock and Anderson probably misidenti- 

 fied the males of "Metapenaeus rectacutus'' 

 {~ Penaeopsis jerryi] as "Penaeus serratus" \ = 

 Penaeopsis eduardoi]. It should be added that the 

 specimens of "M. rectacutus" examined by the 

 later authors are no longer extant (G. Rama- 

 krishna^). 



Affinities. — Penaeopsis eduardoi differs from P. 

 rectacuta and P. jerryi in possessing two pairs of 

 movable spines on the telson, a character it 

 shares with two other Indo-West Pacific species, 

 P. challengeri and P. balssi, as well as with the 

 amphi-Atlantic P. serrata. Penaeopsis eduardoi, 

 however, can be distinguished from all its con- 

 geners by features of the petasma and thelycum. 

 It is the only species in which the distomedian 

 projections of the petasma are obsolete, the prox- 

 imal plate lacks mesial crest, and the ventral 

 costa is produced in a long, distal spine extending 

 beyond the row of cincinnuli. The thelycum, in 

 turn, is unique in that the plate of sternite XIV 

 exhibits a caudally pedunculate posteromedian 

 protuberance, whereas in all the other species the 

 latter is represented by a ridge or protuberance 

 which is broad caudally or lacks a peduncle. 

 Furthermore, sternite XII is armed with an elon- 



'G. Ramakrishna, Superintending Zoologist, Zoological Sur- 

 vey of India, pers. commun. 20 March 1978. 



gate, broad basally, semiconical, anteriorly di- 

 rected tooth, which in the other members of 

 Penaeopsis is indistinct or either laterally com- 

 pressed, or short, subconical and directed ven- 

 trally or anteroventrally. 



Variation. — Discussed by Perez Farfante 1977b. 

 Penaeopsis jerryi Perez Farfante 1979 



Figures 6, 15-19 



Metapenaeus rectacutus. Wood-Mason 1891:274. 



Alcock 1901b:50. Alcock and Anderson 



1894:145. 

 Peneus rectacutus. Alcock 1898:73. 

 Penaeus rectacutus. Alcock and Anderson 



1899:278. 

 Peneus iParapeneus) rectacutus. Alcock 1901a:17 



Alcock and McArdle 1901, pi. 49, fig. 5. 

 Parapeneus rectacutus. Alcock 1902:268, fig. 62; 



1905:520 [part]; 1906:33, pi. 6, fig. 19, 19a-b. 



Kemp and Sewell 1912: 16. ?Balss 1925:228. 

 Parapenaeus rectacutus. Schmitt 1926:319. 

 Penaeopsis rectacutus. Schmitt 1926:321. 



Ramadan 1938:67, fig. 12a-b. Sewell 



1955:202. Kurian 1964:216. 

 Penaeopsis rectacuta. Holthuis and Rosa 1965:3 



[part]. George 1966:342. Jones 1967:1337; 



1969:747. George 1969:27. Longhurst 



1971:224. Starobogatov 1972:390 [key, but 



not figures]. Crosnier and Jouannic 1973:12, 



pi. 3, fig. 3. Ivanov and Hassan 1976:5, fig. 3. 

 Penaeopsis jerryi Perez Farfante 1979:208, fig. 1-4 



[holotype, i , BNMH 1978:325; type-locality: off 



Berbera, Somalia, Gulf of Aden, 10''29'48" N, 



45°01'48" E, John Murray Expedition stn 16]. 

 Not Penaeus rectacutus Bate 1881. 



Material. 



Holotype. Paratypes: 



YEMEN— 2d 25, USNM 171430, off Saihut 

 (15°10'N,50°58' El, 240-239 m, 16 May 1971, A. 

 D. Druzhinin. 



SOMALIA— 20d 495, BMNH 1978.326, col- 

 lected with holotype. 



INDIA— 25 2V, USNM 171431, off Cochin, 

 summer 1978, Staff of the Department of Marine 

 Science, University of Cochin. 19, USNM 

 42755, off False Divi Pt ( 15°56 50" N, 81°30 '30" E), 

 439-505 m, 24 December 1890, Investigator stn 



737 



