. Bulletin of the British Museum (Natural History) Zoology. 198 R. A. TRAVERS. Fig. 18 Phoxinusphoxinus, lateral view (54 mm SL: BMNH : 582-655). upright part of the cleithral lamellae' (Howes, 1985: 60, fig- 4). Rhynchocypris steindachneri can be distinguished from its sister species by a shorter head, greater interorbital width and lower scale count. A colour pattern consisting of a dark region around the snout and head that extends posterolater- ally as dark mottling overlying a deep lateral band (Howes, 1985: 60, fig. 5a) is also unique to this species. Howes's description was bas
. Bulletin of the British Museum (Natural History) Zoology. 198 R. A. TRAVERS. Fig. 18 Phoxinusphoxinus, lateral view (54 mm SL: BMNH : 582-655). upright part of the cleithral lamellae' (Howes, 1985: 60, fig- 4). Rhynchocypris steindachneri can be distinguished from its sister species by a shorter head, greater interorbital width and lower scale count. A colour pattern consisting of a dark region around the snout and head that extends posterolater- ally as dark mottling overlying a deep lateral band (Howes, 1985: 60, fig. 5a) is also unique to this species. Howes's description was based upon material held at the United States National Museum, Washington and four Japanese specimens in the collections at the BMNH (: 11-14). Rhynchocypris costatus (Fowler, 1899) Material. NS 43, : 1057 (43 mm); NS 52, : 1058 (52 mm); RS 7. : 1059 (40 mm). Total 3 specimens.* Variation. Morphometric and meristic characters conform with those given by Howes (1985: table 1) for this species. Geographical range. This species is confined to waters of the Amur River basin. This is the first record from Mongolia and extends the known geographical range of the species. Ecological notes. Collected in the main stream and side channels of Herelen Gol. Taxonomic DISCUSSION. Rhynchocypris costatus can be distin- guished from R. steindachneri by a generally more elongate body, longer operculum, and higher vertebral number. The colour pattern consists of a little mottling above a deep lateral band, as described by Howes (1985: 60). His account was based on material in the collection of the AMNH including specimens used by Fowler (1899) for the original description of the species. Phoxinus phoxinus (Linnaeus, 1758) Fig. 18 Material. RS 1, : 582-655 (12-54 mm); NS 18, : 656-734 (16-48 mm); NS 32-35, : 735- 786 (25-54 mm); NS 43, : 787-788 (21-50 mm); NS * Species previously unrepresented in collection of BMNH. 56,
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