Trigonoscuta
Motschulsky, 1853
broad-nosed weevils
Trigonoscuta is a of broad-nosed in the , containing at least 60 described . These are characterized by their broad, short typical of the Entiminae. One species, Trigonoscuta pilosa, has been documented as for the weevil Cerceris sextoides.
Pronunciation
How to pronounce Trigonoscuta: //ˌtrɪɡənoʊˈskjuːtə//
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Identification
Members of this can be recognized as entimine by their broad, short that does not extend far beyond the . The genus name 'Trigonoscuta' (meaning 'triangular shield') likely refers to characteristics of the or , though specific diagnostic features distinguishing Trigonoscuta from related genera in the tribe Geonemini require examination.
Images
Distribution
The occurs in North America. Specific range data varies by ; Trigonoscuta pilosa has been recorded in the western United States where it overlaps with the range of its Cerceris sextoides.
Ecological Role
Serves as for specialized hunting . Trigonoscuta pilosa is a known prey item for Cerceris sextoides, a solitary wasp that provisions its nests with paralyzed for larval development.
Similar Taxa
- Other Geonemini generaSimilar broad-nosed ; precise identification to level requires examination of subtle structural characters of the , , and body proportions.
- Other Entiminae generaShares the characteristic short, broad distinguishing the from other ; differs in tribal and generic characters.
More Details
Predator documentation
The Trigonoscuta pilosa is one of only two species explicitly named as for Cerceris sextoides in published literature, alongside californius.
Taxonomic history
Established by Motschulsky in 1853, the has grown to include at least 67 according to recent catalogues.