Liparthrum

Type species

Leiparthrum bituberculatum Wollaston

Adapted from Wood 1982, p. 363-368

Diagnosis

Liparthrum is similar to Chaetophloeus LeConte. It can be distinguished by the 4-segmented antennal funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
, the unsutured clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
, and the lack of Chaetophloeus’ highly developed anterior margin crenulationscrenulations:
structures on the surface of the integument an having irregular, wavy, or serrate outline
.

Description

Species in this genus range in length from 0.75 to 1.30 mm and from 2.0 to 2.2 times as long as wide. Their color ranges from light to very dark brown. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is wider than long with an asperateasperate:
of a surface or texture which is rough
surface, and the male’s anterior margin is armedarmed:
having a sclerotized surface structure, giving a rough texture; may serve as defense
by a pair of teeth. The scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
is not visible. The elytra’s anterior margin is armedarmed:
having a sclerotized surface structure, giving a rough texture; may serve as defense
with five to six pairs of equally sized crenulationscrenulations:
structures on the surface of the integument an having irregular, wavy, or serrate outline
from suture to striaestriae:
longitudinally arranged lines often impressed or marked by punctures that are located between the interstriae on the Coleopteran elytron
five. The declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
is convex and unarmedunarmed:
having no granules, teeth, tubercles, spines, or other protective structures
. The vestiturevestiture:
a surface covering of scales or setae on the body, wing, or other appendage
consists of rows of interstrial scale-like setaescale-like setae:
setae that are wider than hair
and recumbentrecumbent:
applied to setae which lay in the surface of the body
strial bristle-like setaebristle-like setae:
setae that appear stiff, based on an impression conveyed by size and shape
. The fronsfrons:
the upper anterior portion of the head capsule
is sexually dimorphicdimorphic:
a structure that occurs in two different forms, such as color, shape, or size
, ornamentedornamented:
having markings or structures on the esclerotized regions of the integument, such as setae, tubercles, or granules
by setaesetae:
a hollow, often slender and hair-like cuticular projection
in females. The anterior margin of the compound eye is entire. The scapescape:
the first and basal segment of the insect's antennae
is usually shorter than the 4-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 no suturessutures:
a seam or seam-like line of contact between two sclerites or hardened body parts immovably connected
. 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

United States to Venezuela, Europe to Asia, and Micronesia

World fauna

Number of species: 35, Native species: 3, Introduced species: 0

Hosts

Arbutus, Madura