FISHERY BULLETIN: VOL. 75, NO. 2 



FIGURE 12. — Hymenopenaeus aphoticus, 9 18.5 mm cl, south of 

 Isla Aves, eastern Caribbean. Thelycum, ventral view. 



Maximum size-Males: 18 mm cl; females: 19.5 

 mm cl. 



Geographic and bathymetric ranges-Western 

 Atlantic: southwest Florida (23°56'N, 82°13'W), 

 throughout the Gulf of Mexico, and the Caribbean 

 Sea (12°55'N, 72°04'W). Eastern Atlantic (ac- 

 cording to Crosnier and Forest 1973): south of the 

 Azores Islands and off Morocco (Figure 8). It 

 occurs at depths between about 950 m and 3,256 m 

 (Figure 9). 



Affinities. -Hymenopenaeus aphoticus is closely 

 allied to H. debilis, but may be readily distin- 

 guished from it by the lack of teeth on the ventral 

 margin of the rostrum, the absence of photo- 

 phores, and the shape and disposition of the cor- 

 nea (see above). In males of H. aphoticus, the 

 petasma exhibits smaller distal processes than 

 does that of//, debilis, and the auricle of the disto- 

 lateral process is larger and armed with marginal 

 spinules; also the proximomesial spinules on the 

 free margin of the mesial process are considerably 

 longer than the remaining ones, instead of only 

 slightly longer as in H.debilis. Furthermore, in 

 H. aphoticus the length of the ventrolateral spur 

 at the base of the appendices masculina and 

 interna is equivalent to only 0.5 that of the appen- 

 dix masculina. Although the petasmata of the two 



species are different, the thelyca are markedly 

 similar: the only detectable distinction is that the 

 median protuberance on sternite XIV tends to be 

 narrower in H. aphoticus than in H. debilis. 



Remarks.-ln examining a lot of seven specimens 

 of//, aphoticus obtained at Albatross stn 2117, 

 Roberts and Pequegnat (1970) misread the num- 

 ber on the accompanying label. They stated that 

 in the Smithsonian Institution there is a lot of 

 H. aphoticus taken by the Albatross at "Stn 2217, 

 1889" in the western Atlantic. Actually, the num- 

 ber on the label is 2117 for which the coordinates 

 are 15°24'40"N, 63°31'30"W (south of Isla Aves in 

 the eastern Caribbean, visited by the Albatross in 

 1884) instead of 2217, an 1889 station situated at 

 39°47'20"N, 69°34'15"W, which is off New Jersey. 

 Because the authors thought the lot had been 

 obtained at the latter locality, they stated that the 

 species ranges as far north as 39°47' (actually it 

 has not been recorded from off the Atlantic coast of 

 the United States). The misreading of the label 

 also caused them to be unaware of the Caribbean 

 record for H. aphoticus and to state that "It may 

 eventually be found in the Caribbean also." 



Hymenopenaeus laevis (Bate 1881) 



Figures 4 A, 9, 13-16 



Haliporus laevis Bate 1881:185 [syntypes: 2 9, 

 BMNH; type-locality: SW of Sierra Leone (W of 

 Cameroon), 2°25'N, 20°01'W, 2,500 fm (4,573 

 m), Challenger stn 104]. Bate 1888:289, pi. 42, 

 fig. 2. Bouvier 1906b:3; 1908:80. de Man 1911:7. 

 Estampador 1937:494. 



Hymenopenaeus microps Smith 1884:413, pi. 10, 

 fig. 1 [syntypes: 1 9, USNM 7148, E of Georges 

 Bank, Mass., 41°13'00"N, 60°00'50"W, 906 fm 

 (1,657 m), Albatross stn 2076; 1 9 oral append- 

 ages, YPM 4559, off New Jersey, 38°50'00"N, 

 69°23'30"W, 1,731 fm (3,166 m), Albatross stn 

 2037]. Smith 1886:189; 1887:688, pi. 16, fig. 8. 

 Wood-Mason 1891:277. Wood-Mason and Al- 

 cock 1891:188. 



Haliporus microps. Alcock and Anderson 1894: 

 146. Alcock 1901:25. Bouvier 1906a:255; 1906b: 

 3; 1908:80. de Man 1911:7. Fowler 1912:543. 



Hymenopeneus microps. Alcock 1899a:30. 



Haliporus androgynus Bouvier 1906a:253 [syn- 

 types: 1 9 , MP, between "Dakar et la Praya," 

 (off Mauritania), 16°38'N, 20°44'W, 3,200 m, 

 Talisman stn 105. 1 9, MP, between "Dakar et 



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