Dendrosinus

Type species

Hylesinus globosus Eichhoff

Adapted from Wood 1982, p. 282-285

Diagnosis

This peculiar genus has species with a reduced to absent declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
and a pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
that is groovedgrooved:
having a long, narrow furrow or channel
for the reception of the strongly procurvedprocurved:
pertaining to structure (antennae, setae) which is basally perpendicular to the body and whose apical part is curved anteriorly
elytraelytra:
the two external and hardened or sclerotized forewings of adult Coleoptera, often appearing leather-like in texture
.

Description

This genus ranges in length from 3.3 to 4.3 mm and approximately 1.5 to 1.6 times as long as wide. Their color is matte black. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is unarmedunarmed:
having no granules, teeth, tubercles, spines, or other protective structures
, groovedgrooved:
having a long, narrow furrow or channel
behind for reception of elytraelytra:
the two external and hardened or sclerotized forewings of adult Coleoptera, often appearing leather-like in texture
. The scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
is small. The crenulationscrenulations:
structures on the surface of the integument an having irregular, wavy, or serrate outline
of the anterior margin of the elytraelytra:
the two external and hardened or sclerotized forewings of adult Coleoptera, often appearing leather-like in texture
are not well developed. The declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
is slightly convex and unarmedunarmed:
having no granules, teeth, tubercles, spines, or other protective structures
; the abdomen ascends to meet the apex of the elytraelytra:
the two external and hardened or sclerotized forewings of adult Coleoptera, often appearing leather-like in texture
. The vestiturevestiture:
a surface covering of scales or setae on the body, wing, or other appendage
consists of recumbentrecumbent:
applied to setae which lay in the surface of the body
and light-colored hair-like setaehair-like setae:
setae that are thin and similar to a hair
. The fronsfrons:
the upper anterior portion of the head capsule
is ornamentedornamented:
having markings or structures on the esclerotized regions of the integument, such as setae, tubercles, or granules
by hair, which appear as curly tufts on females. The anterior margin of the compound eye is entire in species north of Mexico. The scapescape:
the first and basal segment of the insect's antennae
is shorter than the 7-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
. The symmetricalsymmetrical:
identical on both sides of a central line
spatulatespatulate:
shaped like a spatual, typically broad at the apex and tapered at the base
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 procoxaeprocoxae:
extra segment occasionally preceding coxa (hip joint) of the first or anterior pair of legs of arthropods
are widely separated and the prothoracic precoxal ridgeprothoracic precoxal ridge:
an elevated, sclerotized ridge extending from the anterior coxae ventrally towards the head
is not enlarged, but present.

Distribution

Eight Neotropical species occur from Florida to Argentina

World fauna

Number of species: 8, Native species: 1, Introduced species: 0

Hosts

Bourreria, Bursera, Eugenia, Jatropha, Torrubia