Onthophilinae

MacLeay, 1819

clown beetles

Genus Guides

2

Onthophilinae is a of histerid beetles ( Histeridae) comprising approximately 8 and at least 80 described . The subfamily includes both extant and fossil , with Cretaceous amber records from Myanmar documenting early morphological diversity. Members are broadly oval beetles, typically small in size. The group is distinguished from other histerids by ventrally open hypomeral antennal cavities and a projecting prosternal lobe.

Pronunciation

How to pronounce Onthophilinae: //ˌɒnθoʊˈfɪlɪniː//

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

Identification

Onthophilinae can be distinguished from other Histeridae by two key morphological characters: hypomeral antennal cavities that open ventrally rather than dorsally, and a prosternal lobe that projects anteriorly. These features are shared with related Cretaceous fossil Cretonthophilus, Phasmister, and Carinumerus. Extant members lack the strongly undulate elytral margin and irregular reticulate seen in some fossil forms.

Distribution

Extant occur globally, though specific regional distributions are poorly documented. Fossil representatives are known from mid-Cretaceous Kachin (Burmese) amber deposits in northern Myanmar, specifically from amber mines near Noije Bum Village, Tanai Township, Myitkyina District, Kachin State. These deposits date to the Upper Albian to Lower Cenomanian (approximately 100-95 million years ago).

Similar Taxa

  • HisterinaeAnother of Histeridae; differs in having dorsally open hypomeral antennal cavities and lacking the projecting prosternal lobe characteristic of Onthophilinae
  • TrypeticinaeHisterid with distinct antennal structure and body form; Onthophilinae separated by ventrally open antennal cavities and prosternal

Sources and further reading