Arachnids of North Carolina
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View Thomisidae Members: NC Records

Tmarus rubromaculatus Keyserling, 1880 - a crab spider

Taxonomy
Order: ARANEAEInfraorder: AraneomorphaeFamily: Thomisidae                                                                                 
Identification
Online Description/Photos: "The prosoma is gray brown. There may be faint radial lines from the fovea. The eyes are set up on tubercles. The clypeus projects forward and, with the forward-oriented chelicerae, gives this genus a distinctive look. The opisthosoma is gray brown to golden brown. A large posteriorly pointing tubercle is on the end. The legs are tan to gray brown and spotted. The markings tend to be larger than those seen in Tmarus angulatus. Otherwise, these species look very similar." (Rose, 2022) BugGuide Google, iNaturalist, Wikipedia, GBIFTechnical Description:

Gertsch, W. J. 1939. A revision of the typical crab spiders (Misumeninae) of America north of Mexico. Bulletin of the American Museum of Natural History 76: 277-442.

Comments: Very similar to T. angulatus in appearance. This species has LI femora >1.5X the length of the carapace, while angulatus's ratio is ca. 1.5X
Total Length: Females 5.2-5.3mm, males 3.7-4.5mm Adult ID: identifiable by photo of specific features and/or supplementary info
Structural Features: A forward-projecting clypeus gives the members of this genus a distinctive look.
Structural photos
Distribution in North Carolina
Comments: Found in SE US, north to CT, West to TX, and extending north into the western provinces of Canada.
County Map: Clicking on a county returns the records for the species in that county.
Adult phenology:
 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: SC; near lake shore
Observation Methods:
Abundance/Frequency:
Behavior: These spiders often rest on twigs, with legs extended and well camouflaged such that they are very difficult to see.
Status in North Carolina
Natural Heritage Program Status:
Natural Heritage Program Ranks:
State Protection:
Comments:

 Photo Gallery for Tmarus rubromaculatus - a crab spider

Photos: 3

Recorded by: Mark BASINGER & Donald ZEPP on 2024-03-14
Harnett Co.
Comment: 		Recorded by: Mark BASINGER & Donald ZEPP on 2024-03-14
Harnett Co.
Comment:
Recorded by: Donald Zepp on 2023-05-04
Johnston Co.
Comment: See palp detail in "Structural photos," above.