Two new species of Byrrhinus Motschulsky, 1858 (Coleoptera, Limnichidae, Limnichinae) from Negros, Philippines

By

Delocado, Emmanuel
Freitag, Hendrik

Type

Article

Date of Publication

2021

Original Publication

ZooKeys

Volume

1070

Pages

51--72

Subjects

biodiversity assessment , COI , integrative taxonomy , minute marsh-loving beetle , Negros Island , new species

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1070.70531

 

Abstract

Two new species of Limnichidae beetles, Byrrhinus negrosensissp. nov. and Byrrhinus villarinisp. nov., are described from the Island of Negros in the Philippines. The adult specimens of the new species can be differentiated by patterns of body punctation, colour and orientation of elytral pubescence, posterolateral angle of pronotum, tarsomere length ratio and aedeagal form. Two clades, representing the two new species, were retrieved in the Maximum Likelihood gene tree using the 3’-end of the COI gene. Maximum genetic divergence within B. negrosensis sp. nov. and B. villarini sp. nov. were recorded to be 2.3% and 1.3%, respectively, while the mean interspecific divergence between the two new species was 19.7%. Morphological descriptions, digital photographs and COI sequences were provided for the two species. The state of knowledge of Byrrhinus is reviewed and an updated Philippine checklist is provided. By coupling morphological and molecular data, this paper provides the first additional new species of Philippine Byrrhinus in the last 28 years.