. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. PsEDNOS • Chernova 505. 102-5 Figure 14. Psednos steini sp. nov. Male, 37 mm standard length. Holotype USNM 200488. Indian Ocean, Crozet Basin, 0-350 m (from Stein, 1979). brae (47) and the coronal pore absent. An- driashev's species 1 has 43 vertebrae (9- 10+33-34), D 38, A 31, P 14(9+5), C 6, lower pectoral lobe longer than upper lobe, and the coracoid has a strong han- dlelike projection. DISCUSSION The presence of 10 new species of Psed- nos in the Atlantic and Indian oceans and the expected existence of a few mor
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. PsEDNOS • Chernova 505. 102-5 Figure 14. Psednos steini sp. nov. Male, 37 mm standard length. Holotype USNM 200488. Indian Ocean, Crozet Basin, 0-350 m (from Stein, 1979). brae (47) and the coronal pore absent. An- driashev's species 1 has 43 vertebrae (9- 10+33-34), D 38, A 31, P 14(9+5), C 6, lower pectoral lobe longer than upper lobe, and the coracoid has a strong han- dlelike projection. DISCUSSION The presence of 10 new species of Psed- nos in the Atlantic and Indian oceans and the expected existence of a few more un- described species in other regions suggests diat die genus Psednos is large and speciose, and has several species that are still un- described. The species of Psednos are var- iable in meristic counts, in number and position of sensory pores, in the depth and width of head, in the extent of inclination of the mouth, in the size of eye, in the size and position of the gill slit, in the structure of pectoral fin and its girdle, and in pig- mentation. Based on these characters, the known species of Psednos might be divid- ed in two groups, as follows. Group 1. Vertebrae 41-43, coronal pore present, infraorbital pores 5(5 + 0) (post- orbital pore iog absent). Included are P. micninis, P. mirabilis, P. niicniroides, P. microps, P. sagassicus, P. steini, and Psed- nos sp. 1. However, the number of tem- poral pores varies in group 1; they are usu- ally 1 + 1 (in P. steini, P. mirabilis, P. sar- gassicus), rarely 3—4 (in P. niicniroides), or 0+1 (in P. microps). Species of this group occur in waters of South Africa {P. micni- rus), the southwestern Indian Ocean (F. steini, P. microps), and also in the Atlantic: northern Sargasso Sea (F. sargassicus), off the slope of New England (F. mirabilis), waters southeast of Greenland (F. rnicni- roides), and eastern North Atlantic (Psed- nos sp. 1). Undescribed Psednos sp. 2 (sen- sii Andriashev, 1992) from southern Cali- fornia and Ba
Size: 2630px × 950px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
