The Sumatran Black Bumblebee is known from a single specimen, a female that was collected (probably sometimes during the late 19th century) on the island of Sumatra, Indonesia.

The species has never been recorded since and might be extinct; however, it is also possible that the single existing specimen represents a melanistic individual of another species that simply has been mislabeled. [1]

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References:

[1] Paul H. Williams: An annotated checklist of bumble bees with an analysis of patterns of description (Hymenoptera: Apidae, Bombini). Bulletin of the Natural History Museum. Entomology series 67: 79-152. 1998

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edited: 25.04.2022