Arachnids of North Carolina
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Tmarus rubromaculatus - a crab spider     Thomisidae Members: NC Records BugGuide Account Public View
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Distribution Records
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Vetting Levels
Adult phenology:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

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synonym
taxonomic_comments
species_comment
id_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
structural_features A forward-projecting clypeus gives the members of this genus a distinctive look.
silk_web
fld_guide_descriptions "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)
online_photos None on BugGuide or iNaturalist. At this writing, there is one at https://www.pbase.com/dydmd/image/160563910
prey
predators
behavior These spiders often rest on twigs, with legs extended and well camouflaged such that they are very difficult to see.
distribution_reference Rose, 2022, Gertsch, 1939.
technical_reference

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.

adult_id 1 identifiable by photo 2 identifiable by photo of specific features and/or supplementary info 3 identifiable from specimen only
abundance
distribution_comments Found in SE US, north to CT, West to TX, and extending north into the western provinces of Canada.
checklist_mt_high
>=4,000 ft.
Regular
Frequent
Infrequent
Occasional
Seldom
 Frequency
checklist_mt_low
<4,000 ft.
Regular
Frequent
Infrequent
Occasional
Seldom
checklist_pd
Piedmont
Regular
Frequent
Infrequent
Occasional
Seldom
checklist_cp
Coastal Plain
Regular
Frequent
Infrequent
Occasional
Seldom
habitat SC; near lake shore
observation_methods
state_protection
NHP_ranks
NHP_status
status_comments

Photo Gallery for Tmarus rubromaculatus a crab spider

Recorded by: Mark BASINGER & Donald ZEPP
Harnett Co.
Comment: Beaten from low tree branches as SAM, molted to adult 20 Mar '24. Green hue on clypeus & lateral edges of prosoma is _not_ an artifact, but an accurate representation of the living spider. Pinkish blob on posterior right side of the opisthosoma is apparently schmutz from an injury, and not a parasite, as first suspected.		Recorded by: Mark BASINGER & Donald ZEPP
Harnett Co.
Comment: Beaten from low tree branches as SAM, molted to adult 20 Mar '24. Green hue on clypeus & lateral edges of prosoma is _not_ an artifact, but an accurate representation of the living spider. Pinkish blob on posterior right side of the opisthosoma is apparently schmutz from an injury, and not a parasite, as first suspected.
Recorded by: Donald Zepp
Johnston Co.
Comment: I had assumed my Tmarus population to be angulatus, but I captured an adult male, the palpus of which (and the LI femur:carapace ratio) are clearly rubromaculatus. I suspect there may be other "hot spots" where the species present has simply been assumed to be angulatus