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Dianthidium subparvum Swenk, 1914
Dianthidium semiparvum Schwarz, 1926; Dianthidium semiparvum gallatinae Schwarz, 1927; Dianthidium parvum var swenki Schwarz, 1928

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Dianthidium
Subgenus: Dianthidium

Dianthidium subparvum FEM mm .x f
© Copyright Laurence Packer 2014 · 7
Dianthidium subparvum FEM mm .x f

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Dianthidium subparvum MALE mm .x f
© Copyright Laurence Packer 2014 · 7
Dianthidium subparvum MALE mm .x f
Dianthidium subparvum, male, T7
© Kimberly Huntzinger, 2007 · 1
Dianthidium subparvum, male, T7

Dianthidium subparvum, male, T7 b
© Kimberly Huntzinger, 2007 · 1
Dianthidium subparvum, male, T7 b
Identification
Extracted from THE POLLEN-COLLECTING BEES OF THE ANTHIDIINI OF CALIFORNIA (Hymenoptera: Megachilidae) by Grigarick A., A. (1968).


This species was previously divided into four sub¬species on the basis of extent of yellow coloration. These yellow markings exhibit the north-to-south clinal pattern typical of several other species. D. sub¬parvum subparvum and gallatinae show the least color while swenki of southern California is the most highly maculated. The black areas may be some¬what brownish, as is the case with the type of galla-tinae. Specimens having white maculations have been observed from British Columbia and Nevada and with the addition of future collections, these speci¬mens may warrant a subspecific name. Tergum VII (fig. 156) of the male of subparvum shows similari¬ties to that of parvum (fig. 153) but is distinguished from it by having a wider median lobe and a blunt appearing penis valve (fig. 158). The female of sub-parvum is separated from parvum only by subtle differences of the sternum VI. This sternum is generally larger, more rounded apically than parvum (figs. 188, 189) and the surface of subparvum appears slightly depressed if the pollen is cleared from the scopa. D. subparvum is fairly common in the mountains of eastern and southern California, but in the Coast Range it is limited to the extreme southern end. Specimens observed from California total 94 males and 88 females. CALIFOflNIA INSECT SUflVEY UHlVtJtllTT Of CALIFORNIA Biological information on this species is limited to the recording of visitations on members of several diverse plant families. The majority of these were found on the Compositae.

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Asteraceae  Agoseris glauca @ BBSL (1)

Artemisia tridentata @ BBSL (1)

Aster foliaceus @ BBSL__PUB (1)

Aster sp @ BBSL__KWC (3); BBSL (6)

Chrysothamnus sp @ BBSL (3)

Chrysothamnus viscidiflorus @ BBSL (1)

Chrysothamnus @ AMNH_BEE (1)

Cirsium @ AMNH_BEE (1)

Encelia farinosa @ BBSL__KWC (1)

Grindelia sp @ BBSL (19)

Grindelia squarrosa @ BBSL (21)

Grindelia @ AMNH_BEE (8)

Gutierrezia sarothrae @ BBSL (1)

Haplopappus sp @ BBSL__PUB (1)

Helianthus annuus @ BBSL (3)

Pyrrocoma liatriformis @ BBSL (1)

Solidago occidentalis @ BBSL (1)

Viguiera multiflora @ BBSL (1)
Boraginaceae  Phacelia @ AMNH_BEE (2)
Capparaceae  Cleome sp @ BBSL (1)
Hydrophyllaceae  Phacelia sp @ BBSL (2)
Malvaceae  Sidalcea sp @ BBSL (1)
Onagraceae  Clarkia dudleyana @ BBSL__KWC (1)
Polemoniaceae  Gilia sp @ BBSL__KWC (1)
Polygonaceae  Eriogonum inflatum @ BBSL__KWC (1)

Eriogonum sp @ BBSL__KWC (1)

Eriogonum umbellatum @ BBSL (1)
_  Asteraceae sp @ BBSL (2)

Asteraceae sp_( @ BBSL (1)

Withheld @ BBSL (2)

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Updated: 2017-10-20 16:27:53 gmt
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