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Genus Psyrassa

narrow reddish longhorn - Psyrassa unicolor Unknown Longhorn Beetle - Psyrassa unicolor 18june2012-col1 - Psyrassa unicolor Psyrassa pertenuis? - Psyrassa pertenuis Psyrassa pertenuis? - Psyrassa pertenuis orange longhorn - Psyrassa unicolor Branch Pruner - Psyrassa pertenuis Branch Pruner or Spined Twig Girdler - Psyrassa unicolor
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Long-horned and Leaf Beetles)
Family Cerambycidae (Long-horned Beetles)
Subfamily Cerambycinae
Tribe Elaphidiini
Genus Psyrassa
Other Common Names
P. unicolor is called Branch Pruner
5 spp. in our area, ~40 spp. total(1); one in Canada(2)
10-12 mm
2 eastern species (unicolor, pertenuis) have uniformly orange to reddish-brown body, legs, and antennae; eyes black; body long, slender, and cylindrical; pronotum same width as head but almost twice as long; elytra nearly parallel-sided, slightly wider than pronotum and 3-5 times longer
so. Canada to n. Brazil, most diverse in Mexico; in our area, 3 spp. are restricted to TX and 2 spp. widespread in e. US(1)
adults found in summer; come to lights
larvae feed on the branches of hickory and pecan trees (damage), girdling the branches deeply enough to cause them to break before leafout in spring