Anthidium paroselae

Taxonomy

Family: Megachilidae
Subfamily: Megachilinae
Tribe: Anthidiini
Genus: Anthidium Fabricius, 1804
Subgenus: A. (Anthidium) Fabricius, 1804
Species: Anthidium paroselae Cockerell, 1898
Common name: none

Overview

Anthidium (Anthidium) paroselae are black with light brown to ferruginous coloration on the antennal flagellum, tegula, trochanter, femur, and tarsi, and yellow maculations (Gonzalez and Griswold 2013). Females have white pubescence. The outer fore and mid basitarsus are covered by dense tomentum. Females have a body length of 7.7–10.0 mm. Male pubescence is longer and denser than that of females. Males range in body length from 8.2–12.3 mm (Gonzalez and Griswold 2013).

Diagnostic characteristics

(modified from Gonzalez and Griswold 2013)

  • Female labrum is basally elevated and lacks preapical projections.
  • Female mandible has seven teeth.
  • Female propodeal triangle is dull or weakly shiny and finely imbricate.
  • 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 impunctate apical zones are dull or weakly shiny and broad, about half of the width of the depressed marginal zone.
  • Female T6 preapical carina is translucent and minutely crenulate.
  • Male S4 apical margin in straight and lacks an apical brush.
  • Male S6 with a small, laterally directed acute spine, and without a projected median lobe.
  • Male S7 is apically truncate.
  • Male T6 lateral spine is weakly curved to straight, and about as long as T7 median spine.
  • Male T7 lateral lobe is apically rounded or subtriangular, and about as broad as the distance between the inner margin and median spine.

May be confused with

Anthidium paroselae may be confused with A. rodecki and A. sonorense due to the combined entirely white pubescence, weakly convex clypeus in profile with a straight distal margin, mostly yellow legs, dull or weakly shiny terga with complete integumental bands, and tergal discs with fine and sparse punctures (Gonzalez and Griswold 2013). Female A. paroselae can be differentiated from A. rodecki and A. sonorense due to the pointed apical tooth on the mandible and the shape of T6. Male A. paroselae can be differentiated from A. rodecki and A. sonorense by the absence of a median lobe on the margin of S6, the short median lobe and a broad distal margin of S8, and the shape of T7 (Gonzalez and Griswold 2013).

Phenology

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

Host associations

Anthidium paroselae is a generalist that has been observed visiting a variety of species within Asteraceae, Boraginaceae, Euphorbiaceae, Fabaceae, Krameriaceae, Plantaginaceae, Polemoniaceae, Polygonaceae, Tamaricaceae, and Zygophyllaceae (Gonzalez and Griswold 2013).

Nesting behavior

A single Anthidium paroselae specimen was observed nesting in hard sand in the desert (Newberry and Cockerell 1900).

Distribution

Anthidium paroselae occur in U.S. in southern California, southern Arizona, southern New Mexico, western Texas, southern Nevada, and southwestern Utah. In Mexico, they are found in Baja California, Sonora, and Durango. They are restricted to the Mojave, Sonoran, Chihuahuan, and Baja California Deserts (Gonzalez and Griswold 2013).


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

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