Friday, June 19, 2020

[Herpetology • 2020] Hemiphyllodactylus bonkowskii & H. ngocsonensis • Two New Species of Hemiphyllodactylus (Squamata: Gekkonidae) from Hoa Binh Province, Vietnam

Hemiphyllodactylus bonkowskii
 Nguyen, Do, Ngo, Pham, Pham, Le & Ziegler, 2020

We describe two new species of the genus Hemiphyllodactylus on the basis of a new collection of geckos from limestone karst forest of Hoa Binh Province, northwestern Vietnam. Hemiphyllodactylus bonkowskii sp. nov. from Hang Kia—Pa Co Nature Reserve and Hemiphyllodactylus ngocsonensis sp. nov. from Ngoc Son—Ngo Luong Nature Reserve can be distinguished from each other and from their congeners by genetic distinction and morphological differences in circumnasal scales, chin scales, precloacal and femoral pores, cloacal spurs, dorsal scales, ventral scales, digital lamellae formula, and color pattern. In phylogenetic analyses, both new species are nested in a clade that includes H. dushanensis, H. flaviventris, H. hongkongensis, H. huishuiensis, H. kiziriani, H. serpispecus, and H. zugi. In terms of pairwise genetic distance, the two new species are at least 7.5%–8.5% divergent from other described species based on a fragment of the ND2 gene.

Keywords: Reptilia, Hemiphyllodactylus, limestone karst, molecular phylogeny, new species, ND2 mitochondrial gene, taxonomy, Hang Kia—Pa Co, Ngoc Son—Ngo Luong

The male holotype of Hemiphyllodactylus bonkowskii sp. nov. (IEBR 4689)

Hemiphyllodactylus bonkowskii sp. nov.

Distribution. Hemiphyllodactylus bonkowskii sp. nov. is currently known from the type locality in Hang Kia– Pa Co NR, Hoa Binh Province, Vietnam (Fig. 1). 

Etymology. We name the new species in honour of Prof. Dr. Michael Bonkowski from the Institute of Zoology, University of Cologne, Germany for his support of our biodiversity research in limestone karst forests in Vietnam and Laos. For the common names we suggest Bonkowski’s Slender Gecko (English) and Thạch sùng dẹp bonkowski (Vietnamese).

Hemiphyllodactylus ngocsonensis sp. nov.

Distribution. Hemiphyllodactylus ngocsonensis sp. nov. is currently known from the type locality in Ngoc Son—Ngo Luong NR, Lac Son District, Hoa Binh Province, northwestern Vietnam (Fig. 1).

Etymology. Specific epithet ngocsonensis is a toponym in reference to the type locality of the species. For the common names we suggest Ngocson Slender Gecko (English) and Thạch sùng dẹp ngọc son (Vietnamese).

Truong Quang Nguyen, Quyen Hanh Do, Hanh Thi Ngo, Anh Van Pham, Cuong The Pham, Minh Duc Le and Thomas Ziegler. 2020. Two New Species of Hemiphyllodactylus (Squamata: Gekkonidae) from Hoa Binh Province, Vietnam. Zootaxa. 4801(3); 513–536. DOI: 10.11646/zootaxa.4801.3.5