Ancistrocerus lutonidus

Bohart, 1974

Ancistrocerus lutonidus is a solitary mason wasp in the Vespidae, Eumeninae, described by Bohart in 1974. As a member of the Ancistrocerus, it shares the diagnostic transverse carina on the first abdominal segment that characterizes this group. The belongs to a genus of primarily solitary that nest in pre-existing cavities or construct free-form mud nests, provisioning with paralyzed caterpillars for their developing larvae.

Ancistrocerus lutonidus by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Ancistrocerus lutonidus: /ænˌsɪstroʊˈsɛrəs luːˈtoʊnɪdəs/

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Identification

Members of the Ancistrocerus can be distinguished from other eumenine by a prominent transverse carina (ridge) on the base of the first abdominal segment (T1), creating an abrupt angle and -facing surface. -level identification within Ancistrocerus requires examination of specific color pattern details, including the presence and extent of pale markings on the abdominal , antennal coloration, and facial markings. For A. lutonidus specifically, reference to the original description (Bohart, 1974) or specialized taxonomic keys for the genus would be necessary for definitive identification.

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Similar Taxa

Ancistrocerus waldeniiShares the same and thus the diagnostic transverse carina on T1; both are mason wasps that construct mud nests, but A. waldenii is distinguished by specific abdominal color patterns including white or yellow markings with a spot on T6 and complete bands on T1-T5 in females
Ancistrocerus unifasciatusAnother congeneric mason wasp with similar overall habitus and nesting in pre-existing cavities or abandoned mud dauber nests; differs in specific details of abdominal banding pattern and geographic distribution
Ancistrocerus campestrisSimilar -level with transverse carina on T1; A. campestris is characterized by yellow hind margins on the first three abdominal segments and specific prey preferences including leaf-tier caterpillars

More Details

Taxonomic context

Ancistrocerus lutonidus is one of approximately 70 described in the Ancistrocerus, a predominantly Holarctic group of mason wasps. The genus is part of the Eumeninae, which includes solitary that are the closest relatives of the social yellowjackets and hornets within Vespidae.

Data availability

The provided sources contain substantial information about congeneric (A. waldenii, A. unifasciatus, A. campestris) but do not include specific observations, descriptions, or ecological data for A. lutonidus itself. The 46 iNaturalist observations suggest the species is documented in citizen science records, but specific details from those observations are not provided in the source material.