Redescription of Stenolophus thoracicus Casey (Coleoptera, Carabidae, Harpalini), a valid species

Yves Bousquet,Peter Messer

doi:10.3897/zookeys.53.470

Abstract

Stenolophus thoracicus Casey is revalidated. The species is redescribed based on a study of the syntypes and of several conspecific specimens from eastern North America. The species differs from the other eastern species of the subgenus Agonoleptus in having the metasternum shorter and the wings reduced to tiny stubs. The dorsal habitus and median lobe of the aedeagus, along with the structures of the internal sac, are illustrated.

Highlights

Lindroth (1968: 921), in his comprehensive monograph of the carabids of Canada and Alaska, synonymized Stenolophus thoracicus Casey with S. conjunctus (Say) pointing out, that the microsculpture on the pronotum of the female “type” was considerably stronger than normal
This species ranges from east-central Vermont to southeastern North Dakota, southwardly to northeastern Kansas, Tennessee, and northeastern Virginia (Fig. 3)
Stenolophus thoracicus belongs to the subgenus Agonoleptus Casey which includes six other species-group taxa: S. conjunctus (Say), S. rotundicollis (Haldeman), S. rotundatus LeConte, S. parviceps (Casey), S. unicolor Dejean, and S. unicolor dolosus Casey

Summary

Introduction

Lindroth (1968: 921), in his comprehensive monograph of the carabids of Canada and Alaska, synonymized Stenolophus thoracicus Casey with S. conjunctus (Say) pointing out, that the microsculpture on the pronotum of the female “type” was considerably stronger than normal. The holdings of the following collections were studied: Buffalo Museum of Science, New York (BMSC), California Academy of Sciences (CAS), National Collection of Insects, Arachnids and Nematodes (CNC), Field Museum of Natural History, Chicago (FMNH), Los Angeles County Museum of Natural History (LACM), Museum of Comparative Zoology (MCZ), Michigan State University Collection (MSUC), North Dakota State University (NDSU), National Museum of Natural History (USNM), University of Wisconsin-Madison Insect Research Collection (WIRC), and the collection of Peter W. Stenolophus thoracicus Casey, 1914: 282.

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Conclusion