Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 01 Aug 2001

Pelagic Fishes of the Genus Eustomias, Subgenus Dinematochirus (Stomiidae), in the Indo-Pacific with the Description of Twelve New Species

Page Range: 683 – 699
DOI: 10.1643/0045-8511(2001)001[0683:PFOTGE]2.0.CO;2
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Abstract

Twelve new species of Eustomias (Dinematochirus) are described from the Indo-Pacific, and new specimens of Eustomias similis, a species previously known from only the holotype, are reported. All have two pectoral fin rays and relatively short barbels with pigmented stems; all but one have a branch or branches off the barbel stem. In addition, several Indo-Pacific specimens with two pectoral fin rays and very rudimentary branches off the barbel stem are informally described as forms of uncertain status. One of the new species occurs throughout the Indo-Pacific and in the southeastern Atlantic. Three others occur in both the north and south Pacific and another in equatorial waters of the western Pacific and Indian Oceans. The remainder appear to have relatively restricted ranges in the Pacific. With these new species, the genus Eustomias now includes 113 species, and the subgenus Dinematochirus 40 species plus several forms of uncertain status. Within Dinematochirus, 14 species are known only from the Atlantic, 19 only from the Indo-Pacific, and seven from both. A key to the species or species groups of the subgenus is provided.

Copyright: The American Society of Ichthyologists and Herpetologists
 Fig. 1. 
 Fig. 1. 

Lateral view of Eustomias elongatus, holotype, USNM 341944, female, 134 mm SL

 Fig. 2. 
 Fig. 2. 

Lateral views of barbels of (A) Eustomias vulgaris, holotype, USNM 292864, female, 190 mm SL; (B) Eustomias danae, holotype, ZMUC P201841, female, 122 mm SL; (C) Eustomias parini, holotype, USNM 321930, male, 101 mm SL; (D) Eustomias paxtoni, holotype, ZMUC P201846, female, 207 mm SL. Scale bars equal 5 mm

 Fig. 3. 
 Fig. 3. 

Lateral views of barbels of (A) Eustomias magnificus, holotype, USNM 322446, male, 101 mm SL; (B) Eustomias longiramis holotype, USNM 322654, female, 163 mm SL; (C) Eustomias elongatus, holotype, USNM 341944, female, 134 mm SL; (D) Eustomias bulbiramis, holotype, USNM 321965, sex undet., 84 mm SL; (E) Eustomias flagellifer, holotype, USNM 326036, sex undet., 90 mm SL. Scale bars equal 5 mm

 Fig. 4. 
 Fig. 4. 

Lateral views of barbels of (A) Eustomias cryptobulbus, holotype, USNM 322887, female, 132 mm SL; (B) Eustomias similis, USNM 340433, female, 109 mm SL; (C) Eustomias albibulbus, holotype, USNM 301210, female, 144 mm SL; (D) Eustomias problematicus, holotype. USNM 323038, female, 96 mm SL; (E) Eustomias sp., USNM 322218, male, 75 mm SL. Scale bars equal 5 mm

 Fig. 5. 
 Fig. 5. 

Locations of capture of six species and one form of Eustomias (Dinematochirus) in the west-central Pacific and eastern Indian Oceans. Large star at 21°N, 158°W indicates capture of all except Eustomias danae near Hawaii. Limits of map exclude one capture of Eustomias cryptobulbus in the southeastern Pacific and five captures in the southeastern Atlantic (see Material examined)

 Fig. 6. 
 Fig. 6. 

Locations of capture of seven species of Eustomias (Dinematochirus) in the west-central Pacific and eastern Indian Oceans. Large star at 21°N, 158°W indicates capture of all except Eustomias paxtoni near Hawaii. Limits of map exclude one capture each of Eustomias bigelowi and Eustomias schmidti in the southeastern Pacific and one capture each of Eustomias macronema, E. paxtoni, and Eustomias satterleei in the western Indian Ocean (see Material Examined in this paper or Clarke, 2000)

Accepted: 16 Feb 2001
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