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.
absent. Eyes large, well-developed, finely faceted. Antennal segment 3 distinctly elongate (at least twice as long as 4). 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, simple. Lateral pronotal margins widest at middle, distinctly denticulatedenticulate:
set with little teeth or notches.
. Procoxal cavitiesprocoxal cavities:
external closure: Externally closed when the postcoxal processes of the hypomera meet the prosternal process or meet one another.
open. Metacoxaemetacoxae:
the coxae of the metathorax.
narrowly separated, separation less than metacoxal length. Tarsal formulatarsal formula:
the number of tarsomeres on the fore, mid, and hind tarsi, respectively.
4–4–4. Dorsal surface consisting of thin, fine, hair-like 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.
.
The genus Endeitoma is similar in general appearance to the other genera with 10-segmented antennaeantennae:
paired, segmental appendages, borne one on each side of head, functioning as sense organs and bearing a large number of sensilla.
and a 1-segmented club that lack a subantennal groovesubantennal 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.
, including Synchita and Paha. The genus Synchita differs in antennal segment 3 not distinctly elongate and the dorsal surface with short, bristle-like 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.
or with strongly curved, flattened, multi-colored elytral 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.
. Paha differs in antennal segment 3 not distinctly elongate, 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 two parallel, longitudinal carinaecarina:
an elevated ridge or keel, not necessarily high or acute.
, the lateral margins widest anteriorly and distinctly explanateexplanate:
spread out and flattened; applied to a margin.
, and the dorsal pubescencepubescence:
short, fine, soft, erect hair or down.
is minute or lacking. In Endeitoma, the third antennal segment is distinctly elongate (at least twice as long as segment 4), the lateral pronotal margins are distinctly denticulatedenticulate:
set with little teeth or notches.
, and a dorsal pubescencepubescence:
short, fine, soft, erect hair or down.
consists of thin, fine, hair-like 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.
.
Endeitoma dentata (Horn, 1885Horn, 1885:
Horn, G.H. 1885. Contributions to the coleopterology of the United States. No.4. Transactions of the American Entomological Society, 12: 128-162, illus.), E. granulata (Say, 1826Say, 1826:
Say, T. 1826. Descriptions of new species of coleopterous insects inhabiting the United States. Journal of the Academy of Natural Sciences of Philadelphia, 5(2): 237-284.)
Northeast (DE, MD, PA, WV), North Central (IN, MO), Southeast (AL, FL, GA, MS, NC), South Central (OK, TX) USA.
Endeitoma has been collected from under the bark of dead hardwoods and pines.
Abundance: Moderately common.
Endeitoma dentata: Pronotal lateral margin not explanateexplanate:
spread out and flattened; applied to a margin.
, unicolored. Length of 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.
equal to or longer than diameter of eye. Distribution: Florida, Georgia, Mississippi, Oklahoma, USA.
Endeitoma granulata: Pronotal lateral margin weakly explanateexplanate:
spread out and flattened; applied to a margin.
and moderately translucent, appearing bi-colored. Length of 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.
shorter than diameter of eye. Distribution: Alabama, Delaware, Florida, Georgia, Indiana, Maryland, Mississippi, Missouri, North Carolina, Oklahoma, Pennsylvania, Texas, West Virginia, USA.
Horn (1885)Horn (1885):
Horn, G.H. 1885. Contributions to the coleopterology of the United States. No.4. Transactions of the American Entomological Society, 12: 128-162, illus., 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., Say (1826)Say (1826):
Say, T. 1826. Descriptions of new species of coleopterous insects inhabiting the United States. Journal of the Academy of Natural Sciences of Philadelphia, 5(2): 237-284., Stephan (1989)Stephan (1989):
Stephan, K.H. 1989. The Bothrideridae and Colydiidae of America north of Mexico (Coleoptera: Clavicornia and Heteromera). Occasional Papers of the Florida State Collection of Arthropods, 6: xii + 65 pp.
Authors: Lord NP, Nearns EH, Miller KB. 2011–2015.
Content updated Apr 2015; taxonomy updated Feb 2026
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