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Systematics, phylogeny and biogeography
RESEARCH ARTICLE (Open Access)

Closing a biogeographic gap: a new pettalid genus from South Australia (Arachnida : Opiliones : Cyphophthalmi : Pettalidae) with a UCE-based phylogeny of Cyphophthalmi

Gonzalo Giribet https://orcid.org/0000-0002-5467-8429 A * , Matthew Shaw B , Arianna Lord A and Shahan Derkarabetian https://orcid.org/0000-0002-9163-9277 A
+ 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 South Australian Museum, North Terrace, Adelaide, SA 5000, Australia.

* Correspondence to: ggiribet@g.harvard.edu

Handling Editor: Prashant Sharma

Invertebrate Systematics 36(11) 1002-1016 https://doi.org/10.1071/IS22043
Submitted: 25 August 2022  Accepted: 15 October 2022   Published: 10 November 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

Pettalidae is a family of mite harvestmen that inhabits the former circum-Antarctic Gondwanan terranes, including southern South America, South Africa, Madagascar, Sri Lanka, Australia and New Zealand. Australia is home to two pettalid genera, Austropurcellia, in northern New South Wales and Queensland, and Karripurcellia, in Western Australia, until now showing a large distributional gap between these two parts of the Australian continent. Here we report specimens of a new pettalid from South Australia, Archaeopurcellia eureka, gen. et sp. nov., closing this distributional gap of Australian pettalids. Phylogenetic analyses using traditional Sanger markers as well as ultra-conserved elements (UCEs) reveal that the new genus is related to the Chilean Chileogovea, instead of any of the other East Gondwanan genera. This relationship of an Australian species to a South American clade can be explained by the Antarctic land bridge between these two terranes, a connection that was maintained with Australia until 45 Ma. The UCE dataset also shows the promise of using museum specimens to resolve relationships within Pettalidae and Cyphophthalmi.

ZooBank: urn:lsid:zoobank.org:pub:9B57A054-30D8-4412-99A2-6191CBD3BD7E

Keywords: arachnid, biogeography, Gondwana, mite harvestmen, phylogenomics, UCEs, ultra-conserved elements, vicariance.


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