Scolytogenes

Type species

Scolytogenes darwinii Eichhoff

Adapted from Wood 1982, p. 861-866

Diagnosis

North American Scolytogenes are distinguished from other related Cryphalina by having only one angulate septumseptum:
a wall, partition, or internal projection within a cavity or hollow organ
on their near-circular to slightly obovateobovate:
inversely egg shaped (ovate), with the narrow end basal
clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
.

Description

Species in this genus range from 0.8 to 1.9 mm in length and are 2.3 to 2.7 times as long as wide. Their color varies from brown to black. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is as long as wide, with a fine raised line on the lateral and basalbasal:
situated at the base or inner edge and proximal to the main body
margins, and armedarmed:
having a sclerotized surface structure, giving a rough texture; may serve as defense
in the 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 with or without 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 and light colored hair- and scale-like setaescale-like setae:
setae that are wider than hair
, which is erect in some species. The anterior margin of the compound eye varies from entire to emarginateemarginate:
notched or indented
. The scapescape:
the first and basal segment of the insect's antennae
is usually longer than the 4-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
. The oval to ovateovate:
egg shaped, with the narrow end apically
clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
is large relative to its eye, and without suturessutures:
a seam or seam-like line of contact between two sclerites or hardened body parts immovably connected
except for a septumseptum:
a wall, partition, or internal projection within a cavity or hollow organ
that extends to the middle at an angle. 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

Florida, and Mexico to Venezuela

World fauna

Number of species: 100, Native species: 1, Introduced species: 0

Hosts

Calonyction, Candiosperma, Ipomoea, Serjania (for the only occurring species in the USA)