Meloe niger

Kirby, 1837

black meloe

Meloe niger, commonly known as the black meloe, is a blister beetle in the Meloidae. It is native to North America and is one of many in the Meloe characterized by their distinctive oil beetle . Like other members of its genus, it possesses chemical defenses based on cantharidins. The species was described by Kirby in 1837.

Schnellkäfer Hemicrepidius 9704c by NobbiP. Used under a CC BY-SA 3.0 license.

Schnellkäfer Hemicrepidius 9709c by NobbiP. Used under a CC BY-SA 3.0 license.

Schnellkäfer Hemicrepidius 9705c by NobbiP. Used under a CC BY-SA 3.0 license.

Pronunciation

How to pronounce Meloe niger: /ˈmɛloʊ ˈnaɪɡər/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

As a member of the Meloe, M. niger shares the characteristic oil beetle body plan: a large, rounded with short that leave much of the abdomen exposed, giving an 'ill-fitting waistcoat' appearance. The epithet 'niger' indicates black coloration. Specific diagnostic features distinguishing M. niger from other North American Meloe species are not documented in available sources. Identification to species level in this genus typically requires examination of male genitalia and other subtle morphological characters.

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Habitat

Specific preferences for M. niger are not documented. Related Meloe are typically associated with open, sunny habitats including grasslands, meadows, and areas with ground-nesting bees, which serve as for their parasitic larvae.

Distribution

North America. Documented from Canadian provinces including Alberta, British Columbia, and Manitoba. The is present across North America generally.

Life Cycle

The of Meloe niger has not been specifically documented. Based on the Meloe generally: females deposit in burrows excavated in soil, often near or within nests of ground-nesting bees. Larvae (triungulins) emerge and employ a parasitic strategy, typically by attaching to female bees and being transported to nest burrows where they consume pollen provisions and larvae. Development includes with distinct larval stages.

Ecological Role

As a member of the Meloe, the likely functions as a or of ground-nesting solitary bees (Hymenoptera: Apidae), particularly digger bees and related groups. This parasitic relationship can influence local .

Human Relevance

Like other blister beetles, M. niger likely contains cantharidins—potent blistering compounds that can cause skin irritation upon contact. The is medically significant due to these defensive chemicals, though specific human encounters with M. niger are not documented. Blister beetles in hay can pose risks to livestock.

Similar Taxa

Meloe americanusAnother North American oil beetle in the same subgenus (Meloe), requiring careful morphological examination to distinguish.
Meloe impressusWidespread North American with similar overall ; -level identification requires detailed examination.
Meloe franciscanusWestern North American with documented - ; distinguished by geographic range and subtle morphological features.

More Details

Taxonomic Note

The is placed in the subgenus Meloe (Meloe) based on the classification system employed in the Meloidae Holdings at the Entomology Research Museum (Pinto & Selander system).

Research Significance

The Meloe has become important in studies of chemical and - , particularly regarding the mimicry of by triungulin larvae. While M. niger itself has not been specifically studied in this context, related have contributed to understanding these evolutionary interactions.