Chaetocnema confinis Crotch

Clark, Shawn M., Lillrose, Tiffany & Belo Neto, Luiz A., 2013, Leaf Beetles of the Cayman Islands (Coleoptera: Chrysomelidae), Insecta Mundi 2013 (279), pp. 1-41: 21-22

publication ID

http://doi.org/10.5281/zenodo.5175767

publication LSID

lsid:zoobank.org:pub:50B509BC-A8F0-4F02-8DD4-2E5823EFBBA4

DOI

http://doi.org/10.5281/zenodo.5187898

persistent identifier

http://treatment.plazi.org/id/4F725324-FF97-1925-5585-FB7F5D1EFDD0

treatment provided by

Felipe

scientific name

Chaetocnema confinis Crotch
status

 

Chaetocnema confinis Crotch  

( Figure 13)

Chaetocnema confinis Crotch 1873: 75   .

Chaetocnema flavicornis LeConte 1878: 418   .

Chaetocnema perplexa Blake 1941: 177   . NEW SYNONYMY.

Chaetocnema etiennei Jolivet 1979: 641   .

Diagnosis. The body of this species is small (about 1.5 mm long), the hind femora are greatly enlarged, the alutaceous vertex has a few punctures near each eye but is medially impunctate, and the elytra are striately punctate and not pubescent. This combination of characters is not found in any other species of Chrysomelidae   known to occur in the Cayman Islands.

Material examined. Cayman Islands, Grand Cayman, George Town, Green Thumb Nur., 7-XII-2009, N. Hansraj (1, FSCA).

Extralimital distribution. Blake (1941) reported C. perplexa   (here regarded as a synonym of C. confinis   ), or beetles closely resembling both C. perplexa   and mainland North American C. confinis   , from Bermuda, Cuba, Hispaniola, Jamaica, and Puerto Rico. In recent years, C. confinis   has apparently spread to many areas around the world, especially in tropical latitudes ( Jolivet 2004).

Plant associations. This beetle species feeds on various plants in the family Convolvulaceae ( Clark et al. 2004)   .

Comments. Blake (1941) described C. perplexa   , distinguishing it from continental North American C. confinis   , based solely on minor differences in the aedeagus. She stated that the two taxa are externally indistinguishable. She also stated that females, unassociated with males, are frequent in the West Indies. Entirely based on the West Indian distribution, we believe these unassociated females to be more likely C. perplexa   than C. confinis   . In more recent years, beetles reported to be C. confinis   have apparently spread to far-flung parts of the world; however, populations in these new areas are parthenogenetic, entirely without males ( Jolivet 2004). It seems more likely that these populations originated from the West Indies, where males are rare and perhaps even absent from some islands, than from mainland North America where both sexes are common. Whatever the case, Jolivet (2004) suggested that the two names are synonymous, in spite of the minor aedeagal differences that have been reported. We concur with this view and hereby formalize the synonymy, although recognizing that a careful taxonomic reevaluation may someday result in reinstatement of the two names.

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Chrysomelidae

Genus

Chaetocnema

Loc

Chaetocnema confinis Crotch

Clark, Shawn M., Lillrose, Tiffany & Belo Neto, Luiz A. 2013
2013
Loc

Chaetocnema etiennei

Jolivet, P. 1979: 641
1979
Loc

Chaetocnema perplexa

Blake, D. H. 1941: 177
1941
Loc

Chaetocnema flavicornis

LeConte, J. L. 1878: 418
1878
Loc

Chaetocnema confinis

Crotch, G. R. 1873: 75
1873