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Instant taxonomy: choosing adequate characters for species delimitation and description through congruence between molecular data and quantitative shape analysis

Citation

Karanovic, T and Lee, S and Lee, W, Instant taxonomy: choosing adequate characters for species delimitation and description through congruence between molecular data and quantitative shape analysis, Invertebrate Systematics, 32, (3) pp. 551-580. ISSN 1445-5226 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 CSIRO

DOI: doi:10.1071/IS17002

Abstract

The lack of university funding is one of the major impediments to taxonomy, partly because traditional taxonomic training takes longer than a PhD course. Understanding ranges of phenotypic variability for different morphological structures, and their use as characters for delimitation and description of taxa, is a tedious task. We argue that the advent of molecular barcoding and quantitative shape analysis makes it unnecessary. As an example, we tackle a problematic species-complex of marine copepods from Korea and Japan, approaching it as a starting taxonomist might. Samples were collected from 14 locations and the mitochondrial COI gene was sequenced from 42 specimens. Our phylogenetic analyses reveal four distinct clades in Korea and Japan, and an additional nine belonging to a closely related complex from other parts of the Northern Pacific. Twenty different morphological structures were analysed for one Japanese and two Korean clades using landmark-based two-dimensional geometric morphometrics. Although there is no single morphological character that can distinguish with absolute certainty all three cryptic species, most show statistically significant interspecific differences in shape and size. We use five characters to describe two new species from Korea and to re-describe Tigriopus japonicus Mori, 1938 from near its type locality.

Item Details

Item Type:Refereed Article
Keywords:barcoding, Copepoda, geometric morphometrics, Harpacticidae, integrative taxonomy
Research Division:Biological Sciences
Research Group:Evolutionary biology
Research Field:Animal systematics and taxonomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Karanovic, T (Dr Tomislav Karanovic)
ID Code:131870
Year Published:2018
Web of Science® Times Cited:12
Deposited By:Ecology and Biodiversity
Deposited On:2019-04-10
Last Modified:2019-07-30
Downloads:0

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