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Dieunomia bolliana (Cockerell, 1910)
Nomia bolliana Cockerell, 1910; Dieunomia bolliana helenii Cockerell, 1936; Nomia (Dieunomia) bolliana Cockerell, 1910; Nomia (Dieunomia) bolliana helenii Cockerell, 1936; Dieunomia (Dieunomia) bolliana helenii (Cockerell, 1936), valid subspecies

Life   Insecta   Hymenoptera   Apoidea   Halictidae   Dieunomia
Subgenus: Dieunomia

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Extracted from Parys K, Griswold T, Ikerd H, Orr M (2018) New records and range extensions of several species of native bees (Hymenoptera: Apoidea) from Mississippi. Biodiversity Data Journal 6: e25230.

Notes: Originally described from Texas (Cockerell 1910), this species is smaller than Dieunomia heteropoda (Say), the more commonly encountered species in northern Mississippi. Two subspecies are currently recognised, the second of which is D. (D.) bolliana helenii (Cockerell 1936). We choose not to use a subspecific classification here, given their questionable status. Notably, Cockerell himself admits that a specimen collected alongside the type of his subspecies "approaches the typical form in having the mesothorax and sides of thorax black" (Cockerell 1936). Similar variation in other collections of this species and other Dieunomia has been observed by MCO. Ultimately, it seems unlikely that this subspecific epithet will survive subsequent taxonomic treatment.

The currently known distribution is reported only for the south-western United States of Texas and New Mexico and ranges south into México (Hurd et al. 1980). Cockerell (1910) reported collections made from Dracopis amplexicaulis (Vahl) Cass (listed as Rudbeckia amplexicaulis) and Helianthus sp. Additional observations of D. bolliana individuals collecting pollen and nectar were reported from Helenium microcephalum DC. and Polypteris texana (DC) A. Gray (Cockerell 1936). Hurd et al. (1980) regard this species as a oligolege of composites, secondarily associated with Helianthus.

Of the ten specimens of D. bolliana reported here from Mississippi (Fig. 4), nine were collected in the month of June and three of those were collected by sweeping roadside patches of Coreopsis sp. for other insects. Two specimens were collected in soybeans on the USDA ARS' research farm outside Leland, MS. The remaining four June specimens were also collected from roadsides by sweeping, but no host plant was recorded. The last specimen was collected in a blue vane trap during July at the Alcorn State University Research Farm located in Mound Bayou, MS.

Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Asteraceae  Coreopsis tinctoria @ BBSL__BBSLID (1); UCRC_ENT (1)

Helenium microcephalum @ BBSL (1)

Helianthus @ UCRC_ENT (1)

Ratibida columnaris @ BBSL__BBSLID (2)

Ratibida columnifera @ UCRC_ENT (1)
Fabaceae  Medicago sativa @ BBSL (1)

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Updated: 2024-04-19 22:04:05 gmt
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