Comparative study of the Chatham Islands Odonata : 2. Morphometric and molecular comparison between Xanthocnemis tuanuii Rowe, 1981 and X. zealandica (McLachlan, 1873) ; with notes on the taxonomic position of Xanthocnemis sinclairi Rowe, 1987 (Zygoptera: Coenagrionidae)

  • We compared Chatham Island endemic species Xanthocnemis tuanuii to its congenerics from the New Zealand South Island: X. zealandica (newly collected specimens)and X. sinclairi (type specimens plus newly collected material). Two independent tests were performed –geometric morphometrics and molecular. Both analyses were consistent in supporting the status of X. tuanuiias a good species. Species differed statistically in the following morphological traits: head (dorsal view), male appendages (dorsal, lateral, posterior and ventral views), thorax (dorsal view), and penis (dorsal and lateral view). In addition to the original diagnostic features (mainly shape of the male superior appendages), a new morphological character is suggested here which reliably distinguishes the species based on the shape of the inferior appendages. There was no statistical support for the species status of X. sinclairi. The only feature re-ported as diagnostic (lower lobe of male superior appendages) was found to be variable and insufficient to warrant the previously proposed taxonomic rank for X. sinclairi. Molecular analysis of specimens showing identical appendages to the X. sinclairi holotype grouped them with X. zealandica specimens. Therefore X. sinclairi is synonymised with X. zealandica.

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Author:Catalina Amaya-Perilla, Milen Marinov, Gregory Holwell, Arvind Varsani, Daisy Stainton, Simona Kraberger, Anisha Dayaram, Nathan Curtis, Robert Cruickshank, Adrian Paterson
Parent Title (English):International Dragonfly Fund : Report
Series (Serial Number):IDF-Report : newsletter of the International Dragonfly Fund (75)
Publisher:International Dragonfly Fund e.V.
Place of publication:Zerf, Germany
Document Type:Part of Periodical
Year of Completion:2014
Year of first Publication:2014
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2014/09/10
Tag:Chatham Island; Geometric morphometrics; New Zealand; South Island; Xanthocnemis; phylogeny
Page Number:32
First Page:1
Last Page:27
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 59 Tiere (Zoologie) / 590 Tiere (Zoologie)
Sammlungen:Sammlung Biologie / Sondersammelgebiets-Volltexte
Licence (German):License LogoDeutsches Urheberrecht