Antilissus

Diagnostic Features

Description

Body cylindrical. Antennaeantennae:
paired, segmental appendages, borne one on each side of head, functioning as sense organs and bearing a large number of sensilla.
10-segmented with a distinct, 1-segmented club. Antennal setation sparse. Subantennal groovessubantennal groove:
groove or concavity lying below the antennal insertion and housing the base of the antenna. Placed between the eye (if present) and the mandibular articulation, and sometimes extends below or behind the eye.
present, extending behind eyes. Eyes small coarsely faceted, with scale-like interfacetal setaeseta:
a sclerotized, hairlike (or scalelike) projection of cuticula arising from a single trichogen cell and surrounded at the base by a small cuticular ring.
. Head with small, distinct templestemple:
the lateral portion of the head between the posterior edge of the eye and an abrupt narrowing of the head to form a posterior neck.
behind eyes. Pronotal discpronotal disc:
the area of the pronotum which is visible dorsally and usually delimited laterally by the two lateral carinae. Contrasted with the paired pronotal hypomera, which extend onto the ventral surface.
convex, lateral margins and pronotal discpronotal disc:
the area of the pronotum which is visible dorsally and usually delimited laterally by the two lateral carinae. Contrasted with the paired pronotal hypomera, which extend onto the ventral surface.
with distinct network of pits, grooves and channels, raised areas with short, flattened, pale setaeseta:
a sclerotized, hairlike (or scalelike) projection of cuticula arising from a single trichogen cell and surrounded at the base by a small cuticular ring.
. Procoxal cavitiesprocoxal cavities:
external closure: Externally closed when the postcoxal processes of the hypomera meet the prosternal process or meet one another.
closed. Metacoxaemetacoxae:
the coxae of the metathorax.
narrowly separated, separation less than metacoxal length. Elytraelytron:
the fore wing in Coleoptera, which is more or less uniformly sclerotized and in resting position is longitudinally oriented, usually meeting the opposite elytron along the midline.
with distinct striae composed of coarse puncturespuncture:
a small impression on the cuticle, like that made by a needle.
. Abdominal ventritesabdominal ventrite:
visible ventral abdominal sclerite. Ventrite number does not correspond to true sternite number except in rare cases where sternite 1 is visible. Also called ventrite.
1–3 connateconnate:
united at base, or along the entire length; fused.
, ventrite 5 with a deep preapical groove. Tarsal formulatarsal formula:
the number of tarsomeres on the fore, mid, and hind tarsi, respectively.
apparently 3–3–3 (actually 4–4–4, tarsomerestarsomere:
one of the divisions of the tarsus.
1 and 2 partially fused). Dorsal surface with short, flattened, pale setaeseta:
a sclerotized, hairlike (or scalelike) projection of cuticula arising from a single trichogen cell and surrounded at the base by a small cuticular ring.
.

Similar Genera

The genus Antilissus is similar to the genus Lobogestoria in having an apparently 3–3–3 tarsal formulatarsal formula:
the number of tarsomeres on the fore, mid, and hind tarsi, respectively.
and grooved pronotumpronotum:
dorsal portion of the pronotum, lying above the lateral pronotal carinae when these are present.
, but Lobogestoria is easily distinguished by the large, horn-like projections of the pronotumpronotum:
dorsal portion of the pronotum, lying above the lateral pronotal carinae when these are present.
extending well over the head. Superficially, Antilissus resembles the genus Neotrichus, but the 1-segmented antennal clubantennal club:
an enlarged portion of the antennal apex, consisting of a variable number of antennomeres (often 3). In an incrassate, antenna the antennomeres gradually enlarge towards to apex, but if there is an abrupt change in length or width at some point, then the antennomeres beyond this are considered to be part of the club.
and distinctive network of pits, grooves and channels of the pronotumpronotum:
dorsal portion of the pronotum, lying above the lateral pronotal carinae when these are present.
serve to distinguish Antilissus.

North American species

Antilissus aper Sharp, 1879

Known Distribution

Known only from Hawaiʻi, USA.

Biology

Antilissus aper have been collected off of Sideroxylon (Sapotaceae).

Abundance: Rarely encountered.

Selected References

Ivie (2002a)Ivie (2002a):
Ivie, M.A. 2002a. 127. Colydiidae, pp. 445-453 In: R. H. Arnett, Jr., Jr. and M. C. Thomas (eds.), American Beetles. CRC Press, Gainesville, Florida.
, Sharp (1879)Sharp (1879):
Sharp, D. 1879. On some Coleoptera from the Hawaiian Islands. Transactions of the Entomological Society of London, 1879(1): 77-105.
, Ślipiński and Lawrence (1997)Ślipiński and Lawrence (1997):
Ślipiński, S.A. and J.F. Lawrence. 1997. Genera of Colydiinae (Coleoptera: Zopheridae) of the Australo-Pacific region. Annales Zoologici (Warszawa), 47: 341-440.

 Antilissus aper  Sharp, 1879
Antilissus aper Sharp, 1879