Bombus cockerelli

Bombus cockerelli, Cockerell's bumblebee, is a yellow and black bumblebee known only from fewer than 30 specimens, collected at a few high-altitude (over 6,500 ft or 2,000 m) localities in the White Mountains of New Mexico, all within an area of less than 300 square miles (780 km2), giving it the smallest range of any of the ~250 species of bumblebees in the world.[1][2]

Bombus cockerelli
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Apidae
Genus: Bombus
Subgenus: Pyrobombus
Species:
B. cockerelli
Binomial name
Bombus cockerelli
Franklin, 1913

Description

Bombus cockerelli is a typical bumblebee in appearance, with queens 15–20 mm (0.6–0.8 in) long, and distinctly smaller workers. The queens and workers are black on the head, with a few pale yellow hairs. The anterior and posterior thorax and the two basal and two terminal abdominal segments are yellow, while abdominal segments 3 and 4 are black.[3] Males are unknown.

Another species of bumblebee, Bombus balteatus, known to occur at high altitudes in Colorado, is similar to B. cockerelli,[4] but B. cockerelli has a shorter head, numerous intermixed black hairs on the anterior thorax, and the abdominal apex is yellow rather than rust-tinted.

History

The bee was first described in 1913, based on six specimens collected near the Rio Ruidoso in New Mexico. Between 1956 and 2011, not even one was seen.[5] For a time, this bee was believed to be just a subspecies and not a full species. However, given access to fresh specimens whose genetic material can be analyzed, it is expected that it will now be possible to determine whether it is a true species.[1]

Conservation status

Despite how rarely it has been seen, the bee is not believed to be endangered or threatened, because its entire range is in U.S. National Forest and tribal lands.[1]

Biology

Nothing is known regarding the biology of this species, other than some specimens having been collected on thistle flowers.[1]

References
  1. Yanega, D. 2013. The status of Cockerell’s Bumblebee, Bombus (Pyrobombus) cockerelli Franklin, 1913 (Hymenoptera: Apidae). Southwestern Entomologist 38: 517-522
  2. Scientists Rediscover Rarest U.S. Bumblebee; UCR Newsroom, December 5, 2011
  3. images of Bombus cockerelli at EOL
  4. Bugguide image of Bombus balteatus
  5. "Scientists Rediscover Rarest U.S. Bumblebee: Cockerell's Bumblebee Was Last Seen in the United States in 1956". Science Daily. December 5, 2011. Retrieved January 4, 2012.


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