Anthidium sonorense

Taxonomy

Family: Megachilidae
Subfamily: Megachilinae
Tribe: Anthidiini
Genus: Anthidium Fabricius, 1804
Subgenus: A. (Anthidium) Fabricius, 1804
Species: Anthidium sonorense Cockerell, 1923
Common name: none

Overview

Anthidium (Anthidium) sonorense are black with brown coloration on the antennal flagellum, tegula discs, legs, tarsi, and sterna, and yellow maculations (Gonzalez and Griswold 2013). Females have white pubescence, and a body length of 9.2–12.3 mm. Male pubescence is longer and denser than that of females. Males range in body length from 11.0–12.3 mm (Gonzalez and Griswold 2013).

Diagnostic characteristics

(modified from Gonzalez and Griswold 2013)

  • Female basitarsi with outer surface covered by dense tomentum.
  • Female labrum lacks basal protuberances and preapical projections.
  • Female mandible has 5–6 teeth.
  • Female propodeal triangle is dull or weakly shiny, finely imbricate, and covered in sparse punctures.
  • Female hind tibia with anterior carina present.
  • Female T1T5 discal areas are weakly elevated with dull or weakly shiny, finely imbricate areas between fine, sparse punctures.
  • Female T1T5 depressed marginal zones are finely punctate.
  • Female T1T5 apical impunctate areas are dull or weakly shiny and narrow.
  • Female T6 is straight with translucent preapical carina that is minutely crenulate.
  • Male S4 with median apical brush narrow, with sparse, reddish-brown hairs that can be difficult to distinguish from other hairs on the sterna.
  • Male S4 apical margin is straight medially.
  • Male S6 with lateral spines that are ventrally directed and acute, and the median projection is anteriorly curved.
  • Male S7 is apically truncate.
  • Male S8 has a short, broad apical process that is apically notched.
  • Male T6 lateral spine is straight and about as long as T7 median spine.
  • Male T7 lateral lobe is triangular or subtriangular, and about as broad as the distance between the inner margin and median spine.

May be confused with

Anthidium sonorense may be confused with A. paroselae because they both have a shiny frons, a carina on the anterior margin of the hind tibia, and weakly raised tergal discs. Anthidium sonorense can be differentiated from A. paroselae females by the longer apical mandibular tooth, the presence of two submedian yellow bands on the scutum, and the shape of the apical margin of T6. Male A. sonorense can be differentiated from A. paroselae by the shapes of S6, S7, and T7 (Gonzalez and Griswold 2013).

Phenology

Anthidium sonorense adults have been recorded in flight from April to June, with with peak activity occurring from April to May (Gonzalez and Griswold 2013).

Host associations

Anthidium sonorense is a generalist that has been observed visiting a variety of species within Aizoaceae, Fabaceae, and Zygophyllaceae (Gonzalez and Griswold 2013).

Nesting behavior

Nesting behavior is unknown.

Distribution

Anthidium sonorense occur in southern California in the U.S. (Gonzalez and Griswold 2013). In Mexico, they occur in Baja California Sur, Baja California, and Sonora. They are found primarily in the Sonoran and Mojave Deserts, but are absent in the Chihuahuan Desert. They are mostly found below sea level (Gonzalez and Griswold 2013).


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

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