New World burying beetle resurrected

Evidence from molecular data and breeding trials divides burying beetle species into two groups

Data resources used via GBIF : 158 species occurrences
Nicrophorus vespilloides

Nicrophorus vespilloides by James Bailey. Photo licensed under CC BY-NC 4.0.

Burying beetles (genus Nicrophorus), known for their biparental care, have been the focus of behavioural ecological studies for many years. N. vespilloides is distributed across most of the northern hemisphere, but recent genetic evidence from North America clusters Alaskan specimens outside the rest of the continent.

Using additional genetic data, researchers demonstrated two distinct groups, corresponding to those from Canada versus those from Alaska. In fact, the Alaskan samples clustered with Palearctic samples. Trapping individuals from both regions and setting up breeding trials, the researchers found a mating barrier preventing off-spring from reaching maturity, confirmed the genetic evidence.

The study concludes that N. vespilloides is in fact two species, and suggest readapting a previously used name, N. hebes, for the Nearctic (minus Alaska) group.

Citations

Sikes DS, Trumbo ST & Peck SB (2016) Cryptic diversity in the New World burying beetle fauna: Nicrophorus hebes Kirby; new status as a resurrected name (Coleoptera: Silphidae: Nicrophorinae). Arthropod Systematics & Phylogeny 74(3): 299-309. Senckenberg. Available at: link

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