D I S C O V E R    L I F E   
Bee Hunt! Odonata Lepidoptera 
  HomeAll Living ThingsIDnature guidesGlobal mapperAlbumsLabelsSearch
  AboutNewsEventsResearchEducationProjectsStudy sitesHelp


Anthidium placitum Cresson, 1879
Anthidium bernardinum Cockerell, 1904; Anthidium hesperium dentipygum Swenk, 1914; Anthidium permaculatum Cockerell, 1925; Anthidium bernardinum var mesaverdense Schwarz, 1927; Anthidium niveumtarsum Schwarz, 1927

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Anthidium
Subgenus: Anthidium

Anthidium placitum, male, S8 apex post, VG
© Kimberly Huntzinger, 2007 · 2
Anthidium placitum, male, S8 apex post, VG

Click on map for details about points.

Links
80x5 - 240x3 - 240x4 - 320x1 - 320x2 - 320x3 - 640x1 - 640x2
Set display option above.
Click on images to enlarge.
Anthidium placitum, male, S8 apex profile, VG
© Kimberly Huntzinger, 2007 · 2
Anthidium placitum, male, S8 apex profile, VG
Anthidium placitum, male, T6, VG
© Kimberly Huntzinger, 2007 · 1
Anthidium placitum, male, T6, VG

Anthidium placitum, male, S6, VG
© Kimberly Huntzinger, 2007 · 1
Anthidium placitum, male, S6, VG
Anthidium placitum, male, S7, VG
© Kimberly Huntzinger, 2007 · 1
Anthidium placitum, male, S7, VG

Anthidium placitum, male, S8, VG
© Kimberly Huntzinger, 2007 · 1
Anthidium placitum, male, S8, VG
Anthidium placitum, female, T6, VG
© Kimberly Huntzinger, 2007 · 1
Anthidium placitum, female, T6, VG
Identification
Extracted from: Grigarick A.A., & Stange L.A., (1968). The Pollen Collecting Bees of the Anthidiini of California (Hymenoptera: Megachilidae) Bulletin of the California Insect Survey Volume 9.

A. placitum is structurally similar to A. edwardsii, since both species have the entire apical margin of the female clypeus emarginate and the c1ypeus of the males has a slight apical indentation on the midline. The clypeal emargination of the females is not as strong in placitum as in edwardsii, and this feature is more obscure in specimens examined from Nevada. Tergum VII of the males is distinctive since the lateral lobe is broad in placitum (fig. 46) and spini- form in edwardsii (fig. 49). Similarly, the female tergum VI of these two species provides taxonomic differences. In placitum (fig. 78), the posterior marginal band is prominent as contrasted to the nearly obscure band of edwards;; (fig. 79). A. paIlid;cIypeum also has the apical margin of the c1ypeus emarginate, but in this case the emargination is directed distally from the ciypeus whereas in placitum it is directed proximally. Also, the female clypeus of placitum is nearly flat, whereas it is more convex in pallidicIy- peum. A. placitum is also confused with mormonum since the male tergum VII (figs. 43, 46) is similar and the coloration comparable. However, the lateral lobe of the tergum VII is narrower in mormonum. A. placitum is one of the largest species in California with well-developed yellow bands on the abdomen. The female c1ypeus is typically marked with a median dark stripe as in edwardsi;. The maculations are somewhat reduced in the Great Basin states.

The distribution of placitum appears to be centered in the Great Basin. In California, placitum is found in all the major mountain ranges and Great Basin areas of eastern California. Judging from the known plant associations, Cordylanthus of the Scrophulari- aceae is a favored host, although records are sparse and scattered in five families. Material examined from California included 90 males and 85 females.


Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Asteraceae  Ericameria nauseosa @ UCRC_ENT (1)

Ericameria @ UCRC_ENT (1)

Gutierrezia californica @ UCRC_ENT (1)

Heterotheca villosa @ UCRC_ENT (1)

Solidago confinis @ UCRC_ENT (1)
Boraginaceae  Eriodictyon crassifolium @ UCRC_ENT (1)

Eriodictyon trichocalyx @ UCRC_ENT (1)

Phacelia heterophylla @ UCRC_ENT (1)
Lamiaceae  Monardella linoides @ UCRC_ENT (3)

Stachys albens @ UCRC_ENT (3)
Loasaceae  Mentzelia laevicaulis @ UCRC_ENT (1)
Orobanchaceae  Cordylanthus nevinii @ UCRC_ENT (41)

Cordylanthus ramosus @ UCRC_ENT (1)

Cordylanthus rigidus @ UCRC_ENT (23)
Polygonaceae  Eriogonum umbellatum @ UCRC_ENT (1)

go to Discover Life's Facebook group

Updated: 2019-10-17 10:11:26 gmt
Discover Life | Top
© Designed by The Polistes Corporation