Anthidium maculifrons

Taxonomy

Family: Megachilidae
Subfamily: Megachilinae
Tribe: Anthidiini
Genus: Anthidium Fabricius, 1804
Subgenus: A. (Anthidium) Fabricius, 1804
Species: Anthidium maculifrons Smith, 1854
Common name: none

Overview

Anthidium (Anthidium) maculifrons are dark brown to black with yellow maculations (Gonzalez and Griswold 2013). Females have white pubescence except for yellow to brown hairs on the vertex, scutum, axilla, scutellum, tarsi, and S6. Females have a body length of 9.2–11.2 mm, and males range in length from 9.2–16.9 mm (Gonzalez and Griswold 2013).

Diagnostic characteristics

(modified from Gonzalez and Griswold 2013)

May be confused with

Female A. maculifrons may be confused with A. cochimi due to the elevated discal areas of T1T5, crenulate preapical carina and small, lateral projections on T6 (Gonzalez and Griswold 2013). Female A. maculifrons can be differentiated from A. cochimi by their clypeus without modified hairs, labrum with small and distinct preapical projections, and sparser tomentum on the outer surface of the basitarsi (Gonzalez and Griswold 2013). Male A. maculifrons can be differentiated from A. cochimi, and all other New World Anthidium, by the small ventral spine on the hind coxa and trochanters, digitiform lateral lobe on T7, and long, bifid apical process on S8.

Phenology

Anthidium maculifrons adults have been recorded in flight throughout the year, with peak activity occurring from August to the first half of October (Gonzalez and Griswold 2013).

Host associations

Anthidium maculifrons is a generalist that has been observed visiting a variety of species within Apocynaceae, Asteraceae, Diapensiaceae, Fabaceae, Lamiaceae, and Rubiaceae (Gonzalez and Griswold 2013).

Nesting behavior

Nesting behavior is unknown.

Distribution

Anthidium maculifrons occur from Costa Rica to southern Ontario, Canada. Within the U.S., they range from Arizona and Colorado to the East Coast. They are found primarily in dry forests, pine-oak ecoregions, and temperature forests. They are absent in xeric regions. Anthidium maculifrons is the most abundant and widely distributed Anthidium species in Mesoamerica (Gonzalez and Griswold 2013).


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

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