A Description of the First Instar Larva of Coptotomus interrogatus (Fabricius) (Coleoptera: Dytiscidae: Coptotominae) with an Emphasis on Cranial Morphology and Comments on the Phylogeny of Basal Lineages of Dytiscidae

E. H. Barman

doi:10.1649/712

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E. H. Barman¹

¹Department of Biological & Environmental Sciences Georgia College and State University Milledgeville, GA 31061 e.barman@gcsu.edu

Abstract

First instars hatched from eggs laid by adults of Coptotomus interrogatus (Fabricius) are described and illustrated with an emphasis on cranial morphology. Cranial horns are described as arising from within the frontoclypeal interior and not the distal margin. The distal margin of the frontoclypeus forms a short broadly-rounded nasale with a sub-rectangular labrum inflected onto the epipharynx. The cranial morphology supports a close phyletic relationship between Coptotominae and Laccophilinae.

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E. H. Barman "A Description of the First Instar Larva of Coptotomus interrogatus (Fabricius) (Coleoptera: Dytiscidae: Coptotominae) with an Emphasis on Cranial Morphology and Comments on the Phylogeny of Basal Lineages of Dytiscidae," The Coleopterists Bulletin 58(4), 661-671, (1 December 2004). https://doi.org/10.1649/712

Received: 7 November 2003; Accepted: 1 September 2004; Published: 1 December 2004

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