Anthidium chamelense

Taxonomy

Family: Megachilidae
Subfamily: Megachilinae
Tribe: Anthidiini
Genus: Anthidium Fabricius, 1804
Subgenus: A. (Anthidium) Fabricius, 1804
Species: Anthidium chamelense Gonzalez and Griswold, 2013
Common name: none

Overview

Anthidium (Anthidium) chamelense have an entirely, or almost entirely, black abdomen with an entirely yellow scutellum and axillae (Gonzalez and Griswold 2013). Females have white pubescence with limited dark brown to black hairs on their clypeus, supraclypeal area, vertex, disc of the scutum, coxae, trochanters, outer mid basitarsus, inner tarsi, and terga (except T6). Females range in body length from 16.2–20 mm. Males have the same color pubescence as females, and range in body length from 18.5–21.5 mm (Gonzalez and Griswold 2013).

Diagnostic characteristics

(modified from Gonzalez and Griswold 2013)

  • Female basitarsi are covered with dense tomentum.
  • Female clypeus, supraclypeal area, and frons are covered with simple, stiff, and apically curly or hooked hairs.
  • Female mandible has 7–8 teeth.
  • Female propodeal triangle is dull and finely punctate.
  • Female hind tibia with anterior carina present.
  • Female T1T5 apical margins very weakly depressed.
  • Female T1T5 discal areas punctures are 1-2 puncture widths apart.
  • Female T1T5 integument is shiny and nearly smooth between punctures.
  • Female T1T5 marginal area punctures are slightly closer together than those on the discal areas.
  • Female T6 have long, dense hairs.
  • Male clypeus slightly convex.
  • Male hind coxae are ventrally depressed.
  • Male hind femurs have basal tubercles.
  • Male labrum has low or absent basal protuberances.
  • Male mandible is elongate with three large teeth, sometimes with the upper mandibular separated by smaller teeth, which forms a 6– or 7– toothed mandible.
  • Male S4 distal margin is slightly convex and lacks an apical brush.
  • Male S6 is straight with long, acute lateral and median lobes.
  • Male T6 lateral spine is small, ventrally curved, and sometimes hidden by hairs when viewed dorsally.
  • Male T7 median spine is blunt.

May be confused with

Anthidium chamelense may be confused with A. rodriguezi based on similar body coloration (black abdomen with a yellow scutellum and axillae) and a body length greater than 16 mm (Gonzalez and Griswold 2013). Female A. chamelense can be differentiated from A. rodriguezi based on the presence of a rounded lateral angle on T6 and preapical carina with a semicircular emargination. Male A. chamelense can be differentiated from A. rodriguezi based on an acute lateral spine on T6 and a blunt median spine on T7 (Gonzalez and Griswold 2013).

Phenology

Anthidium chamelense adults have been recorded in flight from July to November (Gonzalez and Griswold 2013).

Host associations

Floral associations are unknown.

Nesting behavior

Nesting behavior is unknown.

Distribution

Anthidium chamelense occur in Guerrero, Jalisco, and Oaxaca, Mexico. They are primarily found in dry and pine-oak forests (Gonzalez and Griswold 2013). None are known to occur in the U.S. or Canada.


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

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