Decadiomus Chapin, 1933

Vandenberg, Natalia J. & Hanson, Paul E., 2019, Overview of the lady beetle tribe Diomini (Coleoptera: Coccinellidae) and description of a new phytophagous, silk-spinning genus from Costa Rica that induces food bodies on leaves of Piper (Piperaceae), Zootaxa 4554 (1), pp. 255-285 : 263-264

publication ID

https://doi.org/ 10.11646/zootaxa.4554.1.9

publication LSID

lsid:zoobank.org:pub:A804E949-109A-468D-B58B-CF7C8BCB3059

DOI

https://doi.org/10.5281/zenodo.5921872

persistent identifier

https://treatment.plazi.org/id/DF18F971-FFCA-0B22-FF4B-F9266D53BEEB

treatment provided by

Plazi

scientific name

Decadiomus Chapin, 1933
status

 

Decadiomus Chapin, 1933 View in CoL

Decadiomus Chapin 1933:96 View in CoL . Type species: Diomus bahamicus Casey, 1899 , by original designation.

Diagnosis. In the New World fauna, Decadiomus species can be distinguished from most previously known Diomini by the combination of: antenna composed of 10 antennomeres, prosternum shaped like a short stemmed Y, short anterior to coxal cavities (about ½ diameter of cavity), intercoxal process with carinae extending to anterior margin or nearly so.

Decadiomus differs from the new genus described in the present paper (which also has only 10 antennomeres) by having free living, predatory larvae, and also by characteristics of the male genitalia: penis with apical flagellum ( Fig. 7 View FIGURES 3–12 ), and outer arm of capsule truncated or strongly reduced and not enclosing the ejaculatory duct prior to its entry into the main penis tube ( Figs. 11–12 View FIGURES 3–12 ).

Genital characteristics of Decadiomus males and females are included in the generic key, below, and also discussed by Gordon (1976) (as Diomus , floridanus group and bigemmeus group), and by Segarra-Carmona and Otero (2014). These characteristics may serve to differentiate Decadiomus species from the occasional occurrence of Diomini with 10 antennomeres from areas outside of the New World (e.g. in some individuals of Diomus flavolaterus (Lea) from Australia).

Remarks. The following species previously classified in Diomus are hereby transferred and represent new combinations within Decadiomus : D. balteatus (LeConte, 1878) , D. floridanus (Mulsant, 1850) , D. amabilis (LeConte, 1852) , D. liebecki (Horn, 1895) , D. myrmidon (Mulsant, 1850) , D. humilis ( Gordon, 1976) , D. pseudotaedatus ( Gordon, 1976) , D. taedatus (Fall, 1901) , D. bigemmeus (Horn, 1895) , and D. austrinus ( Gordon, 1976) . Decadiomus seini Segarra, 2014 is placed as a junior synonym of D. austrinus based on the original type descriptions and illustrations, and a comparison between specimens from Puerto Rico and the type material of D. austrinus .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Coccinellidae

Loc

Decadiomus Chapin, 1933

Vandenberg, Natalia J. & Hanson, Paul E. 2019
2019
Loc

Decadiomus

Chapin, E. A. 1933: 96
1933
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