Descriptions of the Second and Third Instars of Heterosternuta sulphuria (Matta and Wolfe) (Coleoptera: Dytiscidae: Hydroporinae), with A Key For Identification of the Known Larvae of Heterosternuta Strand

Descriptions of structures of the second and third instars of Heterosternuta sulphuria (Matta and Wolfe) are presented. Larvae of H. sulphuria are fairly similar to the known larvae of Heterosternuta Strand, all of these being characterized by the presence of lateral spinulae on the prementum, the a...

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Bibliographic Details
Published in:The Coleopterists bulletin 2010-03, Vol.64 (1), p.85-90
Main Authors: Alarie, Yves, Longing, Scott D
Format: Article
Language:English
Subjects:
Appendages
Biological taxonomies
Capsules
chaetotaxy
Coleoptera
Data ranges
Dytiscidae
Exoskeletons
Heterosternuta cocheconis
Heterosternuta diversicornis
Heterosternuta wickhami
Hydroporini
Insect larvae
Instars
Larvae
Leg
Legs
morphology
Setae
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Summary:Descriptions of structures of the second and third instars of Heterosternuta sulphuria (Matta and Wolfe) are presented. Larvae of H. sulphuria are fairly similar to the known larvae of Heterosternuta Strand, all of these being characterized by the presence of lateral spinulae on the prementum, the absence of natatory setae on the legs, the absence of spiracular openings on the mesothorax and abdominal segments 1–7, siphon of the third instar cone-shaped, short, and highly constricted posterior to insertion of urogomphi, and urogomphomere 1 with secondary setae. A key to identification of the third instars of known species of Heterosternuta is provided.
ISSN:0010-065X
1938-4394
DOI:10.1649/0010-065X-64.1.85