Holcosus undulatus

Harvey, Michael B., Ugueto, Gabriel N. & Gutberlet, Ronald L., 2012, 3459, Zootaxa 3459, pp. 1-156 : 124

Holcosus undulatus Group

Diagnosis.— Species of the Holcosus undulatus Group have eight longitudinal rows of ventrals at midbody. A fourth supraocular is usually absent, however the first supraocular is discrete. The dorsal head plates are not heavily fragmented, although small scales may separate some of the parietals in H. leptophrys . A keyhole shaped depression is absent. Larger anterior gulars undergo a sharp transition to smaller posterior gulars at the intertympanic crease. The dorsals are smooth and covered in macrohoneycomb. The hemipenis lacks discontinuous distal laminae.

Content.— Holcosus chaitzami , Holcosus festivus , Holcosus leptophrys , Holcosus niceforoi , Holcosus quadrilineatus , and Holcosus undulatus .

Distribution.— Species of the Holcosus undulatus Group extend from Central Mexico to Colombia.