Notropis buccula and Hybognathus placitus comprised less than 1% of the fish assemblage following impoundment of Lake Alan Henry.
Results of this study suggest that Hybognathus placitus has become extirpated from the Double Mountain Fork upstream from Lake Alan Henry and that Notropis buccula either has, or soon will, experience a similar fate.
Notropis buccula is endemic to, and historically was widespread throughout, the Brazos River drainage (Cross 1953; Hubbs et al.
Head: Vertex pale with brown, reddish or pale brown dots, transverse fasciae indistinct, orange or pale brown; mandibular and maxillary plates pale brown and orange, usually with whitish spot dorsally on mandibular plate; clypeus pale with dots, sometimes distally with brown transverse band and sometimes with transverse brown band across base; gena pale brown, orange or reddish brown; buccula whitish, gula pale, pale brown or reddish brown; antenna pale, first segment usually with brown or pale brown transverse bands, sometimes with brown dots, third and fourth segments slightly suffused with brown; labium pale, apical segment suffused with brown.
Head: vertex pale with brown dots, transverse fascia orange; base of clypeus and mandibular plate with dark brown transverse band; maxillary plate brownish or orange; mandibular plate brownish and orange sometimes with whitish dorsal portion; clypeus pale with brown marks, distally with transverse brown band; gena suffused with reddish brown; buccula whitish; gula dark reddish brown; antennal segments as in generic description; labium as in generic description.
