Anthidium dammersi

Taxonomy

Family: Megachilidae
Subfamily: Megachilinae
Tribe: Anthidiini
Genus: Anthidium Fabricius, 1804
Subgenus: A. (Anthidium) Fabricius, 1804
Species: Anthidium dammersi Cockerell, 1937
Common name: none

Overview

Anthidium (Anthidium) dammersi are black with yellow to cream maculations, and occasionally have brown antennae, mandible, sterna, legs, and tarsi (Gonzalez and Griswold 2013). Females have white pubescence except for the ferruginous hairs on the inner tarsi. Females range in body length from 7.5–8.6 mm (Gonzalez and Griswold 2013). Males have whitish pubescence on the inner surface of their tarsi. Males range in body length from 8.5–10.2 mm (Gonzalez and Griswold 2013).

Diagnostic characteristics

(modified from Gonzalez and Griswold 2013)

May be confused with

Female A. dammersi can be easily recognized by the white sternal scopa, dull or weakly shiny terga, and T6 with a depressed apical rim across a truncate distal margin, which makes it unlikely that it will be confused with another species. Male A. dammersi may appear similar to A. atrifrons because of the similarly shaped T7, but can be differentiated by the shapes of the lateral lobes of S6 and T7 (Griswold and Gonzalez 2013).

Phenology

Anthidium dammersi adults have been recorded in flight from April to June, with peak activity occurring from the last half of April to the first half of June (Gonzalez and Griswold 2013).

Host associations

Anthidium dammersi is a generalist that has been observed visiting a variety of species of Asteraceae, Boraginaceae, Fabaceae, Lamiaceae, Loasaceae, and Orobanchaceae. Anthidium dammersi has shown a strong preference for Astragalus (Fabaceae) (Gonzalez and Griswold 2013).

Nesting behavior

Nesting behavior is unknown.

Distribution

Anthidium dammersi occur in southern California, Arizona, southwest New Mexico, Nevada, Utah, and southwest Wyoming. Within Mexico, they are distributed throughout Baja California. They are found primarily in the Red Desert, Great Basin, Colorado Plateau, and Mojave Desert (Gonzalez and Griswold 2013).


​Distribution map generated by Discover Life -- click on map for details, credits, and terms of use.

<p><em>Anthidium dammersi</em> female face, photo: Tevan Brady</p>
Anthidium dammersi female face, photo: Tevan Brady
<p><em>Anthidium dammersi</em> female lateral habitus, photo: Tevan Brady</p>
Anthidium dammersi female lateral habitus, photo: Tevan Brady
<p><em>Anthidium dammersi</em> female abdomen, photo: Tevan Brady</p>
Anthidium dammersi female abdomen, photo: Tevan Brady
<p><em>Anthidium dammersi</em> female, diagram showing the dorsal view of the sixth tergite (T6), diagram from Gonzalez and Griswold 2013</p>
Anthidium dammersi female, diagram showing the dorsal view of the sixth tergite (T6), diagram from Gonzalez and Griswold 2013
<p><em>Anthidium dammersi</em> male face, photo: Tevan Brady</p>
Anthidium dammersi male face, photo: Tevan Brady
<p><em>Anthidium dammersi</em> male lateral habitus, photo: Tevan Brady</p>
Anthidium dammersi male lateral habitus, photo: Tevan Brady
<p><em>Anthidium dammersi</em> male abdomen, photo: Tevan Brady</p>
Anthidium dammersi male abdomen, photo: Tevan Brady
<p><em>Anthidium dammersi</em> male, ventral view of fourth sternum (S4), photo from Gonzalez and Griswold 2013</p>
Anthidium dammersi male, ventral view of fourth sternum (S4), photo from Gonzalez and Griswold 2013
<p><em>Anthidium dammersi</em> male, dorsal view of seventh tergum (T7), photo: Tevan Brady</p>
Anthidium dammersi male, dorsal view of seventh tergum (T7), photo: Tevan Brady
<p><em>Anthidium dammersi</em> male, diagram showing dorsal view of seventh tergum (T7), diagram from Gonzalez and Griswold 2013</p>
Anthidium dammersi male, diagram showing dorsal view of seventh tergum (T7), diagram from Gonzalez and Griswold 2013
<p><em>Anthidium dammersi</em> male, diagram showing ventral view of sixth sternum (S6), diagram from Gonzalez and Griswold 2013</p>
Anthidium dammersi male, diagram showing ventral view of sixth sternum (S6), diagram from Gonzalez and Griswold 2013
<p><em>Anthidium dammersi</em> male, diagram showing ventral view of seventh sternum (S7), diagram from Gonzalez and Griswold 2013</p>
Anthidium dammersi male, diagram showing ventral view of seventh sternum (S7), diagram from Gonzalez and Griswold 2013
<p><em>Anthidium dammersi</em> male, diagram showing ventral view of eighth sternum (S8), diagram from Gonzalez and Griswold 2013</p>
Anthidium dammersi male, diagram showing ventral view of eighth sternum (S8), diagram from Gonzalez and Griswold 2013