Dicaelus
Bonelli, 1813
Notched-mouthed Ground Beetles
Species Guides
16- Dicaelus alternans
- Dicaelus ambiguus(notched-mouthed ground beetle)
- Dicaelus chermocki(notched-mouth ground beetle)
- Dicaelus costatus(South Texas embossed carabid)
- Dicaelus crenatus(notched-mouth ground beetle)
- Dicaelus dilatatus(notched-mouthed ground beetle)
- Dicaelus elongatus
- Dicaelus furvus(notched-mouthed ground beetle)
- Dicaelus laevipennis(notched-mouth ground beetle)
Dicaelus is a of ground beetles in the Carabidae, containing approximately 18 described restricted to North America. Members of this genus are commonly known as notched-mouthed ground beetles, a name referencing a distinctive morphological feature of the group. These beetles are primarily active found in terrestrial across the continent.
Pronunciation
How to pronounce Dicaelus: //dɪˈsiːləs//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Dicaelus can be distinguished from other ground beetles by their with segments longer than wide, giving a thread-like appearance. The are exposed and directed forward, typical of predatory carabids. When compared to superficially similar darkling beetles (Tenebrionidae), Dicaelus exhibits faster running movement and lacks the bead-like antennal segments and concealed mandibles characteristic of tenebrionids.
Images
Habitat
Dicaelus inhabit a variety of terrestrial environments. Observations indicate occurrence in dry post oak woodlands, xeric igneous prairies (glades), and rocky areas with moss-covered substrates. The shows particular association with open, dry including hilltop forests, prairie remnants, and woodland edges.
Distribution
Restricted to North America. Distribution records include the United States (Vermont and broadly across the continent) and adjacent regions of Canada and Mexico. The does not occur naturally outside this range.
Behavior
Dicaelus are rapid runners, characteristic of active predatory ground beetles. They have been observed crawling over moss-covered rocks in xeric during daylight hours. Like other carabids, they are primarily ground-dwelling but may climb low vegetation.
Ecological Role
As members of the ground beetle Carabidae, Dicaelus function as in terrestrial , contributing to regulation of in their .
Similar Taxa
- Eleodes (Tenebrionidae)Darkling beetles in this share dark coloration and ground-dwelling habits but differ in having bead-like antennal segments, concealed , slower movement, and characteristic -standing defensive when disturbed.
- Calosoma (Carabidae)Another ground beetle with similar and exposed , but Calosoma are generally larger and more robust with different body proportions.
- Chlaenius (Carabidae)Ground beetles with similar overall and rapid running , but typically with metallic coloration and different mandibular structure.
More Details
Etymology
The 'notched-mouthed ground beetles' refers to a distinctive morphological feature of the , though the specific nature of this notch is not detailed in available sources.
Taxonomic History
The was established by Bonelli in 1813 and has remained a stable taxonomic unit within the Licininae, tribe Licinini.