Cnemonyx

Type species

Cnemonyx galeritus Eichhoff

Adapted from Wood 1982, p. 393-411

Diagnosis

Cnemonyx is distinguished from Scolytus Geoffroy by its clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
which usually has up to three visible suturessutures:
a seam or seam-like line of contact between two sclerites or hardened body parts immovably connected
, by having long setaesetae:
a hollow, often slender and hair-like cuticular projection
on the scapescape:
the first and basal segment of the insect's antennae
, and the presence of a convex declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
.

Description

Species in this genus range from 1.0 to 3.9 mm in length and are approximately 2.0 to 2.7 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 similar to that of Scolytus Geoffroy which is large and broad proportionally to the rest of the body. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
appears to be as long as wide but is usually slightly wider than long, with a few species having it longer than wide; it is unarmedunarmed:
having no granules, teeth, tubercles, spines, or other protective structures
and with a crenulated marginalmarginal:
pertaining to the more or less narrow part of a surface within the edge
line around it. The scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
is small 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 a line, like in the pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
. The declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
is convex but the slope is reduced. The abdomen ascends to meet the elytral apex. 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
with a vestiturevestiture:
a surface covering of scales or setae on the body, wing, or other appendage
that varies from none to an elaborate brush of long hair-like setaehair-like setae:
setae that are thin and similar to a hair
, usually longer in males. The anterior margin of the compound eye is entire. The scapescape:
the first and basal segment of the insect's antennae
is usually as long as the 7-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
, which has characteristic long hair-like setaehair-like setae:
setae that are thin and similar to a hair
, which is more prominentprominent:
raised, elevated, or produced beyond the horizontal plane of a structure
on males. 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 oval-shaped and has two to three procurvedprocurved:
pertaining to structure (antennae, setae) which is basally perpendicular to the body and whose apical part is curved anteriorly
sutures, the first sometimes partially septateseptate:
having a septum or septa
. The procoxaeprocoxae:
extra segment occasionally preceding coxa (hip joint) of the first or anterior pair of legs of arthropods
are subcontiguoussubcontiguous:
pertaining to adjacent structures, margins, or surfaces that are in contact but are not united or fused
. The protibia has a single apicalapical:
situated at the apex or extreme outer edge of a structure or appendage
spine.

Distribution

Florida, Baja California to Argentina

World fauna

Number of species: 49, Native species: 2, Introduced species: 0

Hosts

Hippomane, Ficus, Prunus, Pyrus, Rhus