Beetles of North Carolina
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Scientific Name: Common Name:
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View Carabidae Members:
Members of Trechus:
1 NC Records

Trechus wayahbaldensis Donabauer, 2005 - No Common Name

Family: Carabidae Subfamily: Trechinae                                                             
Comments: One of 82 species in this genus that have been recorded in North America north of Mexico, 42 of which occur in North Carolina (Bosquet, 2012). Trechus wayahbaldensis belongs to subgenus Microtrechus and was included in the Nebulosus Species Group by Donabauer (2005b). In addition to wayahbaldensis, 21 other species are included in this group, 18 of which occur in North Carolina and the rest in Tennessee (Bosquet, 2012)
Species Status: The type locality is Wayah Bald in the Nantahala Mountains (Donabauer, 2005b)
Field Guide Descriptions: Online Resources: BugGuide, Wikipedia, GBIFTechnical Description, Adults/Nymphs: Donabauer (2005b)                                                              
Comments: "Body entirely reddish piceous, paler on head, along suture and along border of elytra; elytra shiny with slight bluish lustre; legs entirely pale, contrasting with body; first segments of antenna pale, segment 3 or 4 and all following slightly darker" (Donabauer, 2005b). Members of this genus generally show too little variation in pattern for standard photographs to be used to identify particular species.
Total Length [body plus wings; excludes ovipositor]: 3.5-4.0 mm, males significantly larger than females (Donabauer, 2005b)
Structural Features: As a member of subgenus Microtrechus, only the first segment of front tarsus is enlarged in males. This species is distinguished from other members of its species group morphometrically and by features of the aedeagus.
Distribution in North Carolina
County Map: Clicking on a county returns the records for the species in that county.
Flight Dates:
 High Mountains (HM) ≥
 4,000 ft.
 Low Mountains (LM) <
 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)
Click on graph to enlarge
Habitats and Life History
Habitats: Wayah Bald is 5,342' in elevation and is covered with high elevation hardwoods.
See also Habitat Account for General High Elevation Forests
Diet: Predatory on small insects and other invertebrates
Observation Methods:
Abundance/Frequency: Considered very rare by Donabauer (2005b)
Adult Phenology:
Status in North Carolina
Natural Heritage Program Status: [SR]
Natural Heritage Program Ranks: [GNR] [S1]
State Protection:
Comments: This species is known only from a single, high elevation peak. Like other members of this genus, it is highly likely to be vulnerable to the warming and drying impacts of climate change.