The smallest of its kind: Description of a new cryptic Amnirana species (Amphibia, Anura, Ranidae) from West African rainforests

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作   者：

Griesbaum, Frederic;  Jongsma, Gregory F. M.;  Penner, Johannes;  Kouame, N'goran Germain;  Doumbia, Joseph;  Gonwouo, Nono L.;  Hillers, Annika;  Glos, Julian;  Blackburn, David C.;  Roedel, Mark-Oliver; 

作者机构：

Frogs & Friends;  Univ Jean Lorougnon Guede;  Univ Hamburg;  University of Yaounde I Faculty of Sciences;  WCF;  Florida Museum of Natural History;  ONG EnviSud Guinee;  Leibniz Inst Evolut & Biodivers Sci;  New Brunswick Museum; 

关键词：

integrative taxonomy;  conservation;  Amnirana albolabris;  biogeography;  Upper Guinean Forest Zone;  Amnirana fonensis;  biodiversity hotspot; 

期刊名称：

Zootaxa

i s s n：

1175-5326

年卷期：

2023 年 5254 期

页   码：

301-339

页   码：

摘   要：

The distribution of the White-Lipped Frog Amnirana albolabris was long assumed to extend from eastern-central to western African rainforests. However, recent molecular phylogenetic analyses revealed that this taxon likely represents several undescribed species. Because the name-bearing types were collected in Gabon, the distantly related West African populations clearly represent an undescribed species that partly occurs in sympatry with Amnirana fonensis. Based on an integrative taxonomic approach, including molecular, morphological, and acoustic data, we describe the 'albolabris' populations from the Upper Guinean Forest Zone as a new species, and redescribe the morphologically similarA. fonensis on the bases of a larger series of genotyped individuals, including the first known females. We also provide new biological information for A. fonensis, including their advertisement call, habitat, and reproductive data. The new species is sister to A. fonensis and the two species differ by 5.8% in the mitochondrial 16S ribosomal RNA gene. Morphologically, males of the new species are smaller and have relatively smaller humeral glands. Females of the new species seem to have shorter legs than A. fonensis. In comparison to A. fonensis, the advertisement call of the new species has a higher dominant frequency and more pronounced frequency modulation. The two species differ in their distribution and habitat preferences, as revealed by environmental niche modelling. Whereas the new species is restricted to the Upper Guinean forests and thus is a true lowland-rainforest inhabitant, A. fonensis lives predominantly in Guinean montane forests in the forest-savanna mosaic zone.