A revised phylogeny of the New Caledonian endemic genus Troglosiro (Opiliones : Cyphophthalmi : Troglosironidae) with the description of four new species
Gonzalo Giribet
A C , Caitlin M. Baker A and Prashant P. Sharma B
+ Author Affiliations
- Author Affiliations
A Museum of Comparative Zoology, Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA 02138, USA.
B Department of Integrative Biology, University of Madison—Wisconsin, 352 Birge Hall, 430 Lincoln Drive, Madison, WI 53706, USA.
C Corresponding author. Email: ggiribet@g.harvard.edu
Invertebrate Systematics 35(1) 59-89 https://doi.org/10.1071/IS20042
Submitted: 21 May 2020 Accepted: 2 August 2020 Published: 5 January 2021
Abstract
The Cyphophthalmi genus Troglosiro (the only genus of the family Troglosironidae) is endemic to New Caledonia, representing one of the oldest lineages of this emerged part of Zealandia. Its species are short-range endemics, many known from single localities. Here we examined the phylogenetic relationships of Troglosironidae using standard Sanger-sequenced markers (nuclear 18S rRNA, 28S rRNA, and mitochondrial 16S rRNA and cytochrome c oxidase subunit I) and a combination of phylogenetic methods, including parsimony under Direct Optimization and maximum likelihood with static homology. We also applied a diversity of species delimitation methods, including distance-based, topology-based and unsupervised machine learning to evaluate previous species designations. Finally, we used a combination of genetic and morphological information to describe four new species – T. dogny sp. nov., T. pin sp. nov., T. pseudojuberthiei sp. nov. and T. sharmai sp. nov. – and discuss them in the broader context of the phylogeny and biogeographic history of the family. A key to the species of Troglosiro is also provided.
urn:lsid:zoobank.org:pub:93541314-8309-468C-BB77-B34C3A81137E
Keywords: biogeography, New Caledonia, short-range endemics, species delimitation, Sternophthalmi, unsupervised machine learning.
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