Pachystomias Günther, 1887
publication ID |
https://doi.org/ 10.1590/1982-0224-2022-0004 |
DOI |
https://doi.org/10.5281/zenodo.12720263 |
persistent identifier |
https://treatment.plazi.org/id/EC2487AA-EA22-C529-643B-FBDBFB685036 |
treatment provided by |
Felipe |
scientific name |
Pachystomias Günther, 1887 |
status |
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Pachystomias Günther, 1887 View in CoL
Diagnosis. Pachystomias can be distinguished in the Malacosteinae by the very large and crescent-shaped suborbital organ, red or orange in fresh specimens; body depth about 13.8-20.0% SL; two nostrils on either side of head; a small postorbital organ below eye; mouth floor, i.e., the membrane between the mandibular symphysis and the hyoid, present; chin barbel without terminal bulb, its length shorter than head length in adults but about equal to 50% SL in juveniles; teeth uniserial in jaws, curved; 5–6 pectoral-fin rays, reduced in length; dorsal- and anal-fin bases approximately equal in length, anal-fin origin just posterior to dorsal-fin origin; photophores in both ventral and lateral series with long spaces separating them into clearly distinct groups (Morrow, Gibbs, 1964; Gibbs, 1986c; McEachran, Fechhelm, 1998; Kenaley, Stewart, 2015g; Sutton et al., 2020). A single valid species (Fricke et al., 2022).
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