Pityotrichus

Type species

Pityophilus barbatus Blackman

Adapted from Wood 1982, p. 1140-1142

Diagnosis

Pityotrychus is similar to Pityophthorus Eichhoff except in having the pregulapregula:
a ventral sclerite immediately posterior to the mouth parts, impressed in the subtribe Xyleborina
more enlarged and ornamentedornamented:
having markings or structures on the esclerotized regions of the integument, such as setae, tubercles, or granules
by a few long hairs in the male or a dense tuft of hair in the female.

Description

The species in this genus range from 1.4 to 1.8 mm in length and are approximately 2.5 times as long as wide. Their color varies from light yellowish brown to dark brown in North American species. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is approximately as long as wide. 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 to bisulcatebisulcate:
a structure that is grooved in two places, often contiguous at both sides of a central line
(in the Asian species) and has granulesgranules:
a small grain-like elevation
. The vestiturevestiture:
a surface covering of scales or setae on the body, wing, or other appendage
consists of short hair-like setaehair-like setae:
setae that are thin and similar to a hair
. The metepisternummetepisternum:
the sclerite between the first and second lateral thoracic sutures
is only visible anteriorly. The anterior margin of the compound eye is emarginated. The scapescape:
the first and basal segment of the insect's antennae
is usually longer than its 5-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
. 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 three procurvedprocurved:
pertaining to structure (antennae, setae) which is basally perpendicular to the body and whose apical part is curved anteriorly
sutures, the first two being at least partially septateseptate:
having a septum or septa
. The pregulapregula:
a ventral sclerite immediately posterior to the mouth parts, impressed in the subtribe Xyleborina
is enlarged in both sexes and is ornamentedornamented:
having markings or structures on the esclerotized regions of the integument, such as setae, tubercles, or granules
by a tuft of long setaesetae:
a hollow, often slender and hair-like cuticular projection
in the females and a few long setaesetae:
a hollow, often slender and hair-like cuticular projection
in the males. The procoxaeprocoxae:
extra segment occasionally preceding coxa (hip joint) of the first or anterior pair of legs of arthropods
are contiguouscontiguous:
sharing an edge or boundary; touching
.

Distribution

Arizona, New Mexico, and Turkmenistan in Central Asia

World fauna

Number of species: 3, Native species: 2, Introduced species: 0

Hosts

Pinus