Anthidium michenerorum

Taxonomy

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

Overview

Anthidium (Anthidium) michenerorum are black with dark reddish-brown coloration from the coxae to the tibiae, light ferruginous coloration on the distitarsi, and yellow or cream maculations (Gonzalez and Griswold 2013). Females have white pubescence except for yellow to ferruginous hairs on the vertex, scutum, axilla, scutellum, inner tarsi, and apex of S6. Females have a body length of 9.5–9.7 mm (Gonzalez and Griswold 2013). Males have white pubescence, and range in body length from 9.4–14.3 mm (Gonzalez and Griswold 2013).

Diagnostic characteristics

(modified from Gonzalez and Griswold 2013)

  • Female labrum lacks basal protuberances and has two large preapical projections that curve upwards.
  • Female mandible has six teeth.
  • Female propodeal triangle is shiny and smooth.
  • Female hind tibia without anterior carina.
  • Female T1T5 discal areas are weakly elevated, shiny, and finely imbricate to smooth between coarse punctures.
  • Female T1T5 depressed marginal zones have dense punctures.
  • Female T1T5 impunctate apical zones are shiny and narrow with doubly carinate margins.
  • Female T6 with a median apical emargination and blunt lateral projections.
  • Male labrum preapical projections are longer than those in females.
  • Male S4 median apical brush with dense, long, black hairs.
  • Male S4 apical margin is deeply and broadly concave medially.
  • Male S6 submedian and median lobes are small and digitiform, giving S6 an almost trilobed appearance.
  • Male S7 is pointed apically.
  • Male S8 apical process is broad and deeply bifid apically with ventrally bent pointed lobes.
  • Male T6 lateral spine is straight, and as long as the T7 median spine.
  • Male T7 lateral lobe is apically rounded and 1.5 times broader than the distance between the inner margin and median spine.

May be confused with

Anthidium michenerorum can be easily distinguished from all other Anthidium species in the northwestern U.S. by the coarse and densely punctate terga with doubly carinate apical margins. Female A. michenerorum can be distinguished from other Anthidium by the shape of T6. Male A. michenerorum can be distinguished from other Anthidium by the deeply concave S4 with a broad median apical brush and the shape of S6 (Gonzalez and Griswold 2013).

Phenology

Anthidium michenerorum adults have been recorded in flight from April to early June (Gonzalez and Griswold 2013).

Host associations

Anthidium michenerorum has been observed visiting Astragalus gracilis, Astragalus racemosus, and Psoralea cuspidata (Fabaceae) (Gonzalez and Griswold 2013).

Nesting behavior

Nesting behavior is unknown.

Distribution

Anthidium michenerorum occur in the southern Great Plains in Kansas, Oklahoma, and Texas. They are restricted to grassland ecosystems (Gonzalez and Griswold 2013).


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

<p>Fig 1, <em>Anthidium michenerorum</em> female face, photo: Jeni Sidwell</p>
Fig 1, Anthidium michenerorum female face, photo: Jeni Sidwell
<p>Fig 2, <em>Anthidium michenerorum</em> female lateral habitus, photo: Jeni Sidwell</p>
Fig 2, Anthidium michenerorum female lateral habitus, photo: Jeni Sidwell
<p>Fig 3, <em>Anthidium michenerorum</em> female abdomen, photo: Jeni Sidwell</p>
Fig 3, Anthidium michenerorum female abdomen, photo: Jeni Sidwell
<p>Fig 4, <em>Anthidium michenerorum</em> female, diagram showing the dorsal view of the sixth tergite (T6), diagram from Gonzalez and Griswold 2013</p>
Fig 4, Anthidium michenerorum female, diagram showing the dorsal view of the sixth tergite (T6), diagram from Gonzalez and Griswold 2013
<p>Fig 5, <em>Anthidium michenerorum</em> male face, photo: Jeni Sidwell</p>
Fig 5, Anthidium michenerorum male face, photo: Jeni Sidwell
<p>Fig 6, <em>Anthidium michenerorum</em>male lateral habitus, photo: Jeni Sidwell</p>
Fig 6, Anthidium michenerorummale lateral habitus, photo: Jeni Sidwell
<p>Fig 7, <em>Anthidium michenerorum </em>male abdomen, photo: Jeni Sidwell</p>
Fig 7, Anthidium michenerorum male abdomen, photo: Jeni Sidwell
<p>Fig 8, <em>Anthidium michenerorum </em>male, ventral view of fourth sternum (S4), photo from Gonzalez and Griswold 2013</p>
Fig 8, Anthidium michenerorum male, ventral view of fourth sternum (S4), photo from Gonzalez and Griswold 2013
<p>Fig 9, <em>Anthidium michenerorum </em>male, dorsal view of seventh tergum (T7), photo: Jeni Sidwell</p>
Fig 9, Anthidium michenerorum male, dorsal view of seventh tergum (T7), photo: Jeni Sidwell
<p>Fig 10, <em>Anthidium michenerorum </em>male, diagram of the sixth sternum (S7), diagram from Gonzalez and Griswold 2013</p>
Fig 10, Anthidium michenerorum male, diagram of the sixth sternum (S7), diagram from Gonzalez and Griswold 2013
<p>Fig 11, <em>Anthidium michenerorum </em>male, diagram showing ventral view of the seventh sternum (S7), diagram from Gonzalez and Griswold 2013</p>
Fig 11, Anthidium michenerorum male, diagram showing ventral view of the seventh sternum (S7), diagram from Gonzalez and Griswold 2013
<p>Fig 12, <em>Anthidium michenerorum</em> male, diagram showing ventral view of eighth sternum (S8, diagram from Gonzalez and Griswold 2013</p>
Fig 12, Anthidium michenerorum male, diagram showing ventral view of eighth sternum (S8, diagram from Gonzalez and Griswold 2013
<p>Fig 13, <em>Anthidium michenerorum </em>male dorsal genitalia, photo from Gonzalez and Griswold 2013</p>
Fig 13, Anthidium michenerorum male dorsal genitalia, photo from Gonzalez and Griswold 2013