Thysanoes

Type species

Thysanoes fimbricornis LeConte

Adapted from Wood 1982, p. 557-569

Diagnosis

Thysanoes can be distinguished from Pseudothysanoes Blackman by the longer than wide pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
and by the presence of antennal suturessutures:
a seam or seam-like line of contact between two sclerites or hardened body parts immovably connected
in all species.

Description

Species in this genus range from 1.2 to 2.3 mm in length and from 2.3 to 3.0 times as long as wide. Their color varies from yellowish brown to black. The usually longer than wide pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is asperateasperate:
of a surface or texture which is rough
on its anterior half. The scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
is small. The declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
is convex, and it has granulesgranules:
a small grain-like elevation
on some species. The vestiturevestiture:
a surface covering of scales or setae on the body, wing, or other appendage
consists of erect scale-like setaescale-like setae:
setae that are wider than hair
, is wider apically, and more abundant on the declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
and at the anterior half of the pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
. The anterior margin of the compound eye is entire. The scapescape:
the first and basal segment of the insect's antennae
is longer than the 6-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
and is ornamentedornamented:
having markings or structures on the esclerotized regions of the integument, such as setae, tubercles, or granules
by long hair. The oval clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
has two procurvedprocurved:
pertaining to structure (antennae, setae) which is basally perpendicular to the body and whose apical part is curved anteriorly
sutures and can bear long hair as well. The procoxaeprocoxae:
extra segment occasionally preceding coxa (hip joint) of the first or anterior pair of legs of arthropods
are separated.

Distribution

Canada to Costa Rica

World fauna

Number of species: 15, Native species: 7, Introduced species: 0

Hosts

Acacia, Acer, Berberus, Berchemia, Carya, Castanea, Celtis, Gleditsia, Quercus, Mimosa, Morusrubra, Prosopis, Rhizophora, Ulmus