Anisandrus

Type species

Anisandrus dispar (Fabricius)

Adapted from Huclr 2007, Rabaglia 2009 and Wood 1982, pages 793-796.

Diagnosis

These species have a visible pronotal mycangial tuft of setaesetae:
a hollow, often slender and hair-like cuticular projection
just in front of the scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
. They are similar to Cnestus Sampson and Xylosandrus Reitter in having a proportionally large, slightly convex declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
with a posterolateral carinacarina:
a ridge or elevation of the cuticle
, but different form Cnestus in having two suturessutures:
a seam or seam-like line of contact between two sclerites or hardened body parts immovably connected
on the anterior side of the antennal clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
instead of three and from both genera by having contiguouscontiguous:
sharing an edge or boundary; touching
procoxae.

Description

Species in this genus range from 1.8 to 3.7 mm in length and range from 2.0 to 2.3 times as long as wide. Their color ranges from dark brown to black. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is wider than long, with semi-circular rows of asperitiesasperities:
pertaining to surface roughenings or dot-like elevations that are not pointed
on the anterior half and a serrate anterior margin with 6 to 8 teeth, the middle 2 usually larger. There is a tuft of hair-like setaehair-like setae:
setae that are thin and similar to a hair
at the basebase:
part of any appendage that is nearest the body
in front of the scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
. The scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
is relatively large and flushed with the elytraelytra:
the two external and hardened or sclerotized forewings of adult Coleoptera, often appearing leather-like in texture
. The elytral anterior margin has no asperitiesasperities:
pertaining to surface roughenings or dot-like elevations that are not pointed
.The declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
is convex to concave and varies from unarmedunarmed:
having no granules, teeth, tubercles, spines, or other protective structures
to bearing small granulesgranules:
a small grain-like elevation
. The anterior margin of the compound eye is emarginateemarginate:
notched or indented
. The scapescape:
the first and basal segment of the insect's antennae
is proportionally longer than the 5-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
. The clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
is obliquely truncateobliquely truncate:
pertaining to a structure abruptly and concavely cut
, with two recurvedrecurved:
bent backward or downward as a smiley face
sutures on its anterior face. They have a depresseddepressed:
a structure that is flattened or impressed
pregular region. The anterior coxaecoxae:
the basal or proximal segment of the insect leg to its body
are contiguouscontiguous:
sharing an edge or boundary; touching
.

Distribution

Europe, Eastern Asia, Canada, Northern and temperate areas of the USA

World fauna

Number of species: 10, Native species: 2, Introduced species: 2

Established exotic species

Anisandrus dispar is present in Washington, Oregon, Idaho, Utah, California, Illinois, Michigan, Ohio, Maine, Massachusetts, Rhode Island, New York, New Jersey, Pennsylvania, Maryland, West Virginia, Virginia, and North Carolina.

Anisandrus maiche is present in Pennsylvania, Ohio, and West Virginia.

Hosts

Acer, Betula, Castanea, Cornus, Fagus, Juglans, Kalmia, Lindera, Malus, Nyssa, Populus, Prunus, Quercus, Sassafras, Vitis