Trypodendron

Type species

Dermestes domesticus Linnaeus

Adapted from Wood 1982, p. 746-753

Diagnosis

Trypodendron is distinguished from Xyloterinus Swaine by the basalbasal:
situated at the base or inner edge and proximal to the main body
area of the clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
which is chitinizedchitinized:
an integument hardened by chitin, the primary substance which hardens the exoskeleton of insects; a hardened area of the exoskeleton
and procurvedprocurved:
pertaining to structure (antennae, setae) which is basally perpendicular to the body and whose apical part is curved anteriorly
into a thin arrow. In addition, the elytraelytra:
the two external and hardened or sclerotized forewings of adult Coleoptera, often appearing leather-like in texture
coloration usually consists of longitudinal dark and light stripes.

Description

Species in this genus range from 2.7 to 4.6 mm in length and are approximately 2.5 to 2.6 times as long as wide. Their color ranges from brown to black and they are often striped. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is wider than long, and its anterior margin may be armedarmed:
having a sclerotized surface structure, giving a rough texture; may serve as defense
or not. 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, usually 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 sparsesparse:
scattered, spread irregularly and some distance apart
, fine, short hair-like setaehair-like setae:
setae that are thin and similar to a hair
. The eye is completely divided. The scapescape:
the first and basal segment of the insect's antennae
is longer than the 4-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
. The obovateobovate:
inversely egg shaped (ovate), with the narrow end basal
club’s corneous basalbasal:
situated at the base or inner edge and proximal to the main body
area is strongly procurvedprocurved:
pertaining to structure (antennae, setae) which is basally perpendicular to the body and whose apical part is curved anteriorly
. 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

North America north of Mexico, Asia, and Europe

World fauna

Number of species: 14, Native species: 5, Introduced species: 0

Hosts

Abies, Acer, Alnus, Betitla, Betula, Carya, Castanea, Fagus, Fraxinus, Larix, Quercus, Picea, Pinus, Populus, Pseudotsuga, Thuja, Tsuga, and Ulmus