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Dianthidium marshi Grigarick and Stange, 1964
Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Dianthidium
Subgenus: Dianthidium

Dianthidium marshi, female, head, 2, mtg
© Kimberly Huntzinger, 2007 · 1
Dianthidium marshi, female, head, 2, mtg

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Dianthidium marshi, female, interantennal b
© Kimberly Huntzinger, 2007 · 1
Dianthidium marshi, female, interantennal b
Identification
Extracted from THE POLLEN-COLLECTING BEES OF THE ANTHIDIINI OF CALIFORNIA (Hymenoptera: Megachilidae) by Grigarick A., A. (1968).


The maculations of this species are predominantly pale yellow. The specimens from Inyo County have reddish submarginal bands on the first two metasomal terga similar to those found on d. dubium. These bands extend to three segments on a male spec-men from Riverside County, but are limited to the firs: segment on the female. The tridentate tergum VII (fig. 147) of the male and rather transverse apica! margin of the female tergum VI (fig. 201) associate this species with those assigned to the group c: Dianthidium pudicum (Cresson) by Timberlake (1943). D. marshi is readily distinguished from all species in North America by the presence of pretuberances between the antennal sockets on both sexes (fig. 187) and the unique male genitalia (fig. 149). This uncommon species was discovered only recently, but its limited and separate distribution suggest that it may now exist only as isolated remŽnants of a southern species. One specimen has been collected from the Catalina Mountains of Arizona.

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Updated: 2019-02-18 00:15:24 gmt
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