Cryptic speciation in the giant Antarctic isopod Glyptonotus antarcticus (Isopoda, Valvifera, Chaetiliidae)

Authors

  • Christoph Held Lehrstuhl für Spezielle Zoologie - Alfred-Wegener-Institut
  • Johann Wolfgang Wägele Lehrstuhl für Spezielle Zoologie - Museum Koenig

DOI:

https://doi.org/10.3989/scimar.2005.69s2175

Keywords:

sibling species, molecular systematics, biogeography, Antarctic benthos

Abstract


The genus Glyptonotus is most commonly regarded as monospecific, with Glyptonotus antarcticus Eights 1852 being its only constituent. Two more forms (G. acutus, G. antarcticus var. obtusus) that had been described based on morphological evidence have received little attention in the literature, though no formal attempt to evaluate their taxonomic status has been undertaken. In a survey of within-species genetic diversity, 23 specimens of the benthic Antarctic isopod Glyptonotus antarcticus from three sampling areas around the Antarctic had a high genetic variability in their mitochondrial LSU (16S) gene. Eleven unique mitochondrial haplotypes were found, two at the Antarctic Peninsula (AP), two in the Ross Sea (RS) and seven in the Eastern Weddell Sea (EWS). Average haplotype variation within sampling areas (AP, RS, EWS) was one order of magnitude less than between sampling areas. In the EWS, however, two highly differentiated haplotypes co-exist. These four groups of haplotypes may represent cryptic, but reproductively isolated species rather than a single species.

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Published

2005-12-30

How to Cite

1.
Held C, Wägele JW. Cryptic speciation in the giant Antarctic isopod Glyptonotus antarcticus (Isopoda, Valvifera, Chaetiliidae). scimar [Internet]. 2005Dec.30 [cited 2021Aug.3];69(S2):175-81. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/321

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Articles