FISHERY BULLETIN: VOL. 75, NO. 2 



Haliporoides Stebbing 1914:20 [type-species, by 

 monotypy, Haliporoides triarthrus Stebbing 

 1914. Gender, masculine]. Caiman 1925:9. 



Hymenopenaeus. Burkenroad 1936:102 [part]. 



Parahaliporus Kubo 1949:207. 



Hymenopenaeus (Haliporoides). Barnard 1950: 

 619. 



Diagnosis. -Body moderately robust, carapace 

 elongate, integument firm. Rostrum relatively 

 long, extending at least to, often beyond, second 

 antennular article, ventral margin straight or 

 concave; armed with dorsal and, frequently, with 

 ventral teeth; epigastric tooth separated from 

 rostral teeth by interval noticeably longer than 

 spaces between latter. Orbital and branchiostegal 

 spines absent; postorbital, antennal, ptery- 

 gostomian, hepatic, and suprahepatic spines 

 present. Cervical sulcus deep, long, extending to, 

 but not across, middorsum of carapace; hepatic 

 sulcus long, turning anteroventrally from almost 

 horizontal posterior part and reaching base of 

 pterygostomian spine; orbital-antennal and 

 branchiocardiac carinae and sulci well marked; 

 submarginal carina sharp. Abdomen carinate 

 dorsally at least along three posterior somites. 

 Telson with pair of fixed, lateral spines. Prosar- 

 tema moderately long, broad, and flexible. Anten- 

 nular flagella similar, subcylindrical and long, 

 not less than 3 times carapace length. Mandibular 

 palp three jointed (occasionally two jointed in 

 H. triarthrus, Ivanov and Hassan 1976), proximal 

 article short and narrow, intermediate one larger, 

 scalene-triangular in shape, and distal article 

 considerably shorter and narrower than preced- 

 ing one and tapering to blunt apex. First maxilla 

 with unsegmented palp, gently narrowing to 

 rounded apex. Fourth and fifth pereopods rela- 

 tively stout proximally, fifth not much longer 

 than fourth. First pereopod with or without spine 

 on basis. Exopods (quite small) on all maxillipeds 

 and pereopods. Lateral ramus of uropod armed 

 with subterminal, distolateral spine. In males, 

 petasma with distal part of ventral costa fused to 

 flexible flap of ventrolateral lobule; distal portion 

 of rib of dorsolateral lobule not elevated above, 

 but at level of adjacent area, and not projecting 

 beyond distal margin; ventromedian lobule lack- 

 ing paired processes distally; endopod of second 

 pleopod bearing appendices masculina and in- 

 terna, its basal sclerite produced into very short, 

 toothlike, ventrolateral spur. Thelycum of open 

 type. Pleurobranchia present on somites IX to 



290 



XIV; single, rather conspicuous arthrobranchia 

 on somite VII, and anterior and posterior arthro- 

 branchiae on somites VIII to XIII. Podobranchia 

 present on second maxilliped, and epipod on 

 second maxilliped (and on first if proximal exite 

 of coxa considered an epipod) through fourth 

 pereopod. 



List of species .-Eastern Pacific: Haliporoides 

 diomedeae (Faxon 1893). Indo-West Pacific: Hali- 

 poroides sibogae (de Man 1907); Haliporoides 

 triarthrus Stebbing 1914. 



Affinities. -The members of Haliporoides can be 

 distinguished readily from those belonging to 

 other related genera by the following features: 

 the epigastric tooth is separated from the series 

 of rostral teeth by an interval conspicuously 

 longer than the spaces between the latter; the 

 presence of a suprahepatic spine and an orbito- 

 antennal sulcus which, although shallow, is 

 clearly distinct; the spine of the lateral ramus 

 of the uropod which is subterminal. Also, the 

 arthrobranchia on somite VII is well developed 

 instead of being rudimentary and, in males, the 

 basal sclerite of the second pleopod is produced 

 into a very short, toothlike, rather than foliaceous, 

 ventrolateral spur. 



In addition to the characters cited above, 

 Haliporoides, in contrast to Hymenopenaeus , 

 possesses a thick, rigid integument, and lacks a 

 branchiostegal spine and a posthepatic carina; it 

 also possesses a petasma in which the ventro- 

 median lobule is not produced distally into con- 

 spicuous processes, and the rib of the dorsolateral 

 lobule is flush with the surrounding area. Finally, 

 Haliporoides may be separated from Pleoticus- 

 which it resembles in its general mien and in the 

 shape of the rostrum — not only by the characters 

 cited, but also by possessing a sharp branchio- 

 cardiac carina and deep branchiocardiac sulcus as 

 well as by the petasma, in which the ventral costa 

 is fused to the terminal part of the ventrolateral 

 lobule. The above clearly indicates that Hali- 

 poroides is the most distinct of the genera treated 

 here, except perhaps for Mesopenaeus. 



Haliporoides diomedeae (Faxon 1893) 

 Figures 9, 20, 24-28 



Peneopsis diomedeae Faxon 1893:212 [syntypes: 

 3 9, USNM 21175, off Golfo de Panama, 

 7°31'30"N, 79°14'00"W, 458 fm (838 m), 8 March 



