Development of an interactive identification key for Oncaeidae (Copepoda: Cyclopoida).

Böttger-Schnack, Ruth and Schnack, Dietrich (2015) Development of an interactive identification key for Oncaeidae (Copepoda: Cyclopoida). Journal of Natural History, 49 (45-48). pp. 2727-2741. DOI 10.1080/00222933.2015.1022614.

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The current state of development of an interactive electronic identification key for females of the marine pelagic microcopepod family Oncaeidae is presented. To date, 112 species have been described, allocated to seven genera (Archioncaea, Conaea, Epicalymma, Monothula, Oncaea s.str., Spinoncaea, and Triconia) and 16 species groups within the speciose paraphyletic taxon Oncaea s.l. Only two species of Oncaea s.l. show an uncertain group status. Of all described oncaeids, seven species are not yet included in the key due to inadequacies in morphological description and/or lack of type material for re-examination. In addition, seven morphologically distinct species and two new species groups are considered that have not yet been formally described. The key uses easily distinguishable morphological characters as far as possible (e.g. body size, proportional lengths of urosomites, length of P5 exopod) and includes more difficult characters (e.g. spine counts on swimming legs, proportional spine lengths) where required for unequivocal identification. The characters used in the key allow the identification of genera and species groups by investigators with limited taxonomic experience; species separation in most cases requires some advanced dissection skills. Potential identification problems caused by difficulties discerning minute morphological features or intraspecific morphometric variability are discussed. The present version of the identification key still requires complementary illustrations of character states and inclusion of fact sheets summarizing the characteristics of each species with notes on taxonomic uncertainties and links to databases providing zoogeographical and genetic information.

Document Type: Article
Additional Information: WOS:000364824900003
Keywords: identification; key; Oncaeidae; taxonomy
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
OceanRep > Leibniz-Institut für Meereswissenschaften
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1080/00222933.2015.1022614
ISSN: 0022-2933
Date Deposited: 16 Jul 2015 07:57
Last Modified: 11 Apr 2017 10:16

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