Carcinocephalus flavidus
(Hamilton, 1895)
winter rove beetle
Carcinocephalus flavidus, known as the winter , is a of rove beetle in the . It is notable for its unusual winter activity period and distinct between sexes. The species was originally described as Omalium flavidum by Hamilton in 1895. It occurs in northeastern North America, where it has been observed on snow during winter months.
Pronunciation
How to pronounce Carcinocephalus flavidus: /kɑrˈsɪnoʊˈsɛfələs ˈflævɪdəs/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other by its winter activity period and on snow. The pattern—where males can be winged or wingless but females are invariably wingless—is a notable diagnostic feature. The yellowish coloration (reflected in the name) may aid in identification. Separation from other Carcinocephalus species requires examination of detailed morphological characters.
Habitat
Found on snow in winter. Specific microhabitat details beyond snow surface are not documented.
Distribution
Northeastern North America. Documented from Canada (Alberta, Ontario, Quebec) and the United States (District of Columbia, Massachusetts, Maryland, Maine, New Hampshire, New York, Pennsylvania, Virginia).
Seasonality
Active during winter; observed on snow. This represents an unusual seasonal pattern for a , as most staphylinids are active in warmer months.
Behavior
are active on snow surfaces in winter. The suggests potential differences between sexes, with females being obligately flightless.
Similar Taxa
- Other Carcinocephalus species share the same and may occur in overlapping ranges; require detailed morphological examination for separation
- Other winter-active StaphylinidaeFew are active in winter; C. flavidus is distinguished by its specific pattern and snow-dwelling habit
More Details
Taxonomic History
Originally described as Omalium flavidum by Hamilton in 1895, later transferred to Carcinocephalus
Wing Dimorphism
The exhibits an unusual pattern where is sex-limited: males vary in wing development while females are consistently wingless. This has potential implications for and .