A remarkable new species of the millipede genus Trachyjulus Peters, 1864 (Diplopoda, Spirostreptida, Cambalopsidae) from Thailand, based both on morphological and molecular evidence

By

Likhitrakarn, Natdanai
Golovatch, Sergei
Jeratthitikul, Ekgachai
Srisonchai, Ruttapon
Čhirasak Sutčharit
Somsak Panhā‏

Type

Article

Date of Publication

2020

Original Publication

ZooKeys

Volume

925

Pages

55--72

Subjects

cave , diplopod , molecular-based phylogeny , morphological character , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.925.49953

 

Abstract

A new, giant species of Trachyjulus from a cave in southern Thailand is described, illustrated, and compared to morphologically closely related taxa. This new species, T. magnussp. nov., is much larger than all other congeners and looks especially similar to the grossly sympatric T. unciger Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2012, which is widespread in southern Thailand. Phylogenetic trees, both rooted and unrooted, based on a concatenated dataset of the COI and 28S genes of nine species of Cambalopsidae (Trachyjulus, Glyphiulus, and Plusioglyphiulus), strongly support the monophyly of Trachyjulus and a clear-cut divergence between T. magnussp. nov. and T. unciger in revealing very high average p-distances of the COI gene (20.80–23.62%).