. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. PSEDNOS • Chernovo 483. Figure 4. Psednos barnardi sp. nov. Male, 34-mm standard length. Holotype (rigtit side). Photograph) by K. E. Hartel. of body without pigmentation. Head and belly appear dark because of the color of peritoneum, mouth, and gill cavity. Peri- toneum brownish-black, stomach lighter but also blackish, pyloric ceca light brown- ish-black, intestine slightly pigmented. Gill arches brownish. Mouth light brownish- gray. Gill cavity dark brown. Ventral sur- face of head unpigmented. Distribution. Known
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. PSEDNOS • Chernovo 483. Figure 4. Psednos barnardi sp. nov. Male, 34-mm standard length. Holotype (rigtit side). Photograph) by K. E. Hartel. of body without pigmentation. Head and belly appear dark because of the color of peritoneum, mouth, and gill cavity. Peri- toneum brownish-black, stomach lighter but also blackish, pyloric ceca light brown- ish-black, intestine slightly pigmented. Gill arches brownish. Mouth light brownish- gray. Gill cavity dark brown. Ventral sur- face of head unpigmented. Distribution. Known only from the ho- lotype taken in the eastern North Atlantic, west of Ireland, in midwater at a depth of 800 m. Etymology. This species is named for the well-known Russian ichthyologist An- atole P. Andriashev who, in particular, made the definitive morphologic study of the genus Psednos. Taxonomic Notes. This specimen was designated as a paratype of F. ehhstinae by Andriashev (1992, 1993a), but during the preparation of his work the specimen was on loan in the USA and was not studied in detail, with the exception of its radio- graph and pectoral girdle (Andriashev, 1992: 15). Comparative Notes. Psednos andriash- evi belongs to a species group with 47 ver- tebrae, no coronal pore, 6(5+1) io pores, and 7 preoperculo-mandibular pores. Its long winglike opercular flap reaching be- hind the middle of pectoral length is unique among Psednos. It is also distin- guished by the following: the head is large (27% SL) and compressed (its width 40% HL), long gifl slit (28% HL or eye di- ameter) and located high (end of opercu- lum level with pupil), the pectoral fin short (45% HL) and has 2 notch rays. It is most similar to the sympatric P. christinae, which differs in having a small triangular opercular flap, a smaller gifl slit ( HL or eye diameter), a lower opercular end that is clearly below eye, a smafler (24% SL) and wider head (50% HL), a longer pectoral fin (66%
Size: 2371px × 1054px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
