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Procerosoma Lonsdale & Marshall 2006

Owen Lonsdale and Steve Marshall
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Containing group: Clusiidae

Introduction

Procerosoma Lonsdale & Marshall is a rare Neotropical genus known from one Mexican female (P. prominens Lonsdale & Marshall) and one male and one female from Brazil (P. alini (Shatalkin)) (Lonsdale & Marshall, 2006). The translation of the generic name is 'slender-bodied', referring to the relatively long and thin thorax and legs, which are characteristic of the genus.

The male of Procerosoma alini (and possibly all males in the genus) is distinct in that the head is wider than the thorax and there is one pair of elongate genal 'antlers' that terminate in a bright white bulb. Behavioural observations have not been made, but it is assumed that these structures are associated with head-measuring competitions and male agonistic behaviour, which has been recorded in a number of other clusiid genera.

Characteristics

Procerosoma is a relatively long, thin taxon defined by an inclinate anterior fronto-orbital bristle, an open cell bm, one pair of stripes on the face and scutum, a relatively small scutellum that is slightly angled dorsally, a reduction of the mid fronto-orbital bristle, and an absence of the ocellar, postvertical, acrostichal, and dorsal preapical tibial bristles (Lonsdale & Marshall, 2006). Internally, Procerosoma is characterized by a small pregonite, stout bristles on the postgonite and a basiphallus that is heavily setulose laterally.

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Procerosoma alini (Shatalkin), male genitalia; left to right: external, posterior; external, left lateral (hypandrial complex inset); hypandrial complex, anterior; hypandrial complex, left lateral. © Owen Lonsdale

Phylogenetics

Procerosoma and Sobarocephala together form the sister group to the small neotropical genus Chaetoclusia. These three genera make up the subfamily Sobarocephalinae, which was described and revised by Lonsdale & Marshall (2006).

References

Lonsdale, O. & Marshall, S.A. 2006. Redefinition of the Clusiinae and Clusiodinae, description of the new subfamily Sobarocephalinae, revision of the genus Chaetoclusia and a description of Procerosoma gen. n. (Diptera: Clusiidae). European Journal of Entomology, 103: 163-182.

Title Illustrations
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Scientific Name Procerosoma alini (Shatalkin)
Location Brazil
Comments Procerosoma alini (Shatalkin) female, with male head inset.
Life Cycle Stage Adult
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © Owen Lonsdale
Scientific Name Schizophora
Location Mexico. Chiapas
Specimen Condition Dead Specimen
Identified By O. Lonsdale
Sex Female
Life Cycle Stage Adult
Type Holotype
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © Owen Lonsdale
About This Page

Owen Lonsdale
Canadian National Collection of Insects, Arachnids & Nematodes

Steve Marshall
University of Guelph, Canada

Correspondence regarding this page should be directed to Owen Lonsdale at and Steve Marshall at

Page: Tree of Life Procerosoma Lonsdale & Marshall 2006. Authored by Owen Lonsdale and Steve Marshall. The TEXT of this page is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.

Citing this page:

Lonsdale, Owen and Steve Marshall. 2007. Procerosoma Lonsdale & Marshall 2006. Version 20 August 2007 (under construction). http://tolweb.org/Procerosoma/27694/2007.08.20 in The Tree of Life Web Project, http://tolweb.org/

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