Karyotypes of some medium-sized Dytiscidae (Agabinae and Colymbetinae) (Coleoptera)

Angus, Robert B.; Clery, Molly; Carter, Jodie; Wenczek, Daniel

doi:10.3897/compcytogen.v7i2.5223

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Article: Karyotypes of some medium-sized Dytiscidae (Agabinae and Colymbetinae) (Coleoptera)

Title

Karyotypes of some medium-sized Dytiscidae (Agabinae and Colymbetinae) (Coleoptera)

By

Angus, Robert B.
Clery, Molly
Carter, Jodie
Wenczek, Daniel

Type

Article

Date of Publication

2013

Original Publication

Comparative cytogenetics : international journal of plant & animal cytogenetics, karyosystematics and molecular systematics

Volume

Series / Issue

Issue: 2

Pages

171-190

Subjects

Agabus , Chromosomes , Colymbetes , Dytiscidae , Karyotypes , Rhantus , sex chromosome systems

Contributed by

Pensoft Publishers

Language

English

Published by

St. Petersburg, Russia [Published] with technical support of Zoological Institute RAS [2007]-

Identifiers

DOI: https://doi.org/10.3897/compcytogen.v7i2.5223

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License Type URL: https://creativecommons.org/licenses/by/4.0/
Rights: https://biodiversitylibrary.org/permissions
Copyright Status: In copyright. Digitized with the permission of the rights holder.
Rights Holder: Copyright held by individual article author(s).

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expand Abstract

An account is given of the karyotypes of 29 species of medium sized Dytiscidae (Coleoptera). Of the 20 species of Agabus Leach, 1817, 18 have karyotypes comprising 21 pairs of autosomes and sex chromosomes which are either X0(♂) or XX (♀). These species are A. serricornis (Paykull, 1799), A. labiatus (Brahm, 1791), A. congener (Thunberg, 1794), A. lapponicus (Thomson, 1867), A. thomsoni (J. Sahlberg, 1871), A. confinis (Gyllenhal, 1808), A. sturmii (Gyllenhal, 1808), A. bipustulatus (Linnaeus, 1767), A. nevadensis Håkan Lindberg, 1939, A. wollastoni Sharp, 1882, A. melanarius Aubé, 1837, A. biguttatus (Olivier, 1795), A. binotatus Aubé, 1837, A. affinis (Paykull, 1798), A. unguicularis (Thomson, 1867), A. ramblae Millan & Ribera, 2001, A. conspersus (Marsham, 1802) and A. nebulosus (Forster, 1771). However two species, A. infuscatus Aubé, 1838 and A. adpressus Aubé, 1837, have developed a neo-XY system, with karyotypes comprising 21 pairs of autosomes and XY sex chromosomes (♂). No chromosomal differences have been detected between typical A. bipustulatus and A. bipustulatus var. solieri Aubé, 1837, nor have any been found between the three species of the A. bipustulatus complex (A. bipustulatus, A. nevadensis and A. wollastoni). The four species of Colymbetes Clairville, 1806, C. fuscus (Linnaeus, 1758), C. paykulli Erichson, 1837, C. piceus Klug, 1834 and C. striatus (Linnaeus, 1758) have karyotypes comprising 20 pairs of autosomes and sex chromosomes which are X0 (♂), XX (♀). Two of the species of Rhantus Dejean, 1833, R. exsoletus (Forster, 1771) and R. suturellus (Harris, 1828) have karyotypes comprising 20 pairs of autosomes and X0/XX sex chromosomes, but the other three species, R. grapii (Gyllenhal, 1808), R. frontalis (Marsham, 1802) and R. suturalis (Macleay, 1825) have 22 pairs of autosomes and X0/XX sex chromosomes. Agabus congener and Rhantus suturellus may have one B-chromosome. Nine of the species have previously published karyotype data but for seven of these the data are wrong and are here corrected.