PEREZ FARE ANTE; REVISION OF PENAEID SHRIMP GENUS PENAEOPSIS 



elevations, and the posteromedian protuberance 

 is caudally pedunculate in P. eduardoi (in the 

 other species a strong median ridge instead of a 

 protuberance is usually present). Finally, in P. 

 challengeri the median plate of sternite XIII is 

 subpentagonal instead of semicircular or cor- 

 diform and exhibits a central depression which 

 continues anteriorly as a median groove. 



Remarks. -As Perez Farfante {1977b) pointed out. 

 Bate (1888) illustrated the petasma of a male of 

 his Penaeus serratus (= Penaeopsis challengeri] 

 that actually belongs to a different species, 

 Penaeopsis eduardoi. This male together with 

 nine females and at least one other male were 

 taken of Matuku, Fiji Islands, at Challenger stn 

 173. Five of these females were identified by Bate 

 as Penaeus rectacutus [they are actually, at least 

 the three that are now in the BMNH, Penaeopsis 

 eduardoi ], the other four females are syntypes of 

 his Penaeus serratus. and the male must be as- 

 sumed to be a member of the syntypic series. It is 

 beyond question that the male depicted by Bate 

 as P. serratus is a specimen of Penaeopsis eduar- 

 doi: the dorsomedian projections of the petasma 

 are obsolete and each ventral costa is produced in 

 a long spine extending considerably farther dis- 

 todorsally than that in Penaeus serratus. The 

 probability that Bate also examined the syntypic 

 second male (which is P. serratus, 65 mm tl) is 

 indicated by his statement "Length ... of the 

 largest male 76 mm"; this clearly indicates that 

 he had at least one other male in addition to the 

 "largest" one. The smaller male was in the jar 

 with the three females of "Penaeus rectacutus" 

 [= Penaeopsis eduardoi], but Bate mentioned no 

 male of this species whereas he referred to males 

 o{ Penaeus serratus; consequently, it seems most 

 likely that the small male P. serratus was mistak- 

 ingly placed with the three females of the former 

 species. In regard to the number of male speci- 

 mens recognized by Bate as "Penaeus serratus," it 

 should be mentioned that Alcock and Anderson 

 (1899) stated that "there are two Challenger 

 specimens [of P. serratus] from Fiji in the Indian 

 Museum" and it is possible that one of them is a 

 male that was examined by Bate. 



Inasmuch as the type-material of P. serratus 

 Bate included a second species, Penaeopsis 

 eduardoi, and a holotype was not designated, it is 

 desirable to select one specimen as the lectotype 

 to associate the name with the species to which it 

 is applied. Although Bate (1888:269) mentioned 



the "type" oi Penaeus serratus, there is no indica- 

 tion as to which specimen he was referring; how- 

 ever, he stated that some specimens taken off the 

 Fiji Islands "were placed under Penaeus rec- 

 tacutus because the thelycum corresponds with 

 that species rather than with the type of this 

 [Penaeus serratus]." His statement leaves no 

 doubt that it was a female to which he was refer- 

 ring. Because the first specimen specifically cited 

 by him (p. 268) was the "largest female, 114 mm" 

 [24 mm cl], I have selected it as the lectotype of 

 Penaeus serratus Bate 1881. This specimen has 

 been assigned BMNH 1978.323. 



The very young specimen (a female) taken in 

 the Torres Strait, at Challenger stn 184, which 

 Bate (1888) recorded as "Penaeus serratus," is ac- 

 tually a member of the genus Metapenaeopsis, M. 

 sinuosa Dall 1957, or a closely related species. 



In the last 45 yr various authors (Burkenroad 

 1934a; Kubo 1949; Ivanov and Hassan 1976) have 

 pointed out the difficulty in defining the specific 

 characters oi"Penaeus serratus." The uncertainty 

 was due to Bate's (1881) imprecise original diag- 

 nosis and the inadequate, although rather elabo- 

 rate, description, accompanied by figures lacking 

 detail (e.g., a sketchy one of the thelycum and in- 

 complete representations of the telson which is 

 depicted as lacking movable spines), that was 

 subsequently presented by him (1888). I have 

 studied part of the type-series and offer a new 

 description and illustrations of those specimens, 

 including the only available description of the 

 petasma. 



Penaeopsis challengeri, like all of its congeners 

 except P. rectacuta and P. jerryi, possesses only 

 two pairs of movable spines on the telson. This 

 character was noted by Bate (1888); however, in 

 discussing the relationships of P. eduardoi with 

 other members of Penaeopsis, I (1977b) errone- 

 ously stated that P. challengeri exhibits three 

 pairs of movable telsonic spines. The specimens 

 examined by me at the time were the four female 

 syntypes in only one of which the telson is entire, 

 but it had been bent and torn in such a way that 

 its sharp edge projected laterally in what ap- 

 peared to be a pair of minute movable spines. My 

 confirmation of Bate's observation on the spina- 

 tion of the telson has been based on a reexamina- 

 tion of the just mentioned female, and a study of 

 the male which, although caught together with 

 the four female syntypes of "Penaeus serratus," 

 was not explicitly cited by him. 



Alcock and Anderson (1899) concluded that "P. 



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