Gorditus rotundus, a new genus and species of Pentodontini from Cuba (Coleoptera: Scarabaeidae: Dynastinae)
Author
Ratcliffe, Brett C.
text
Zootaxa
2010
2683
56
60
journal article
10.5281/zenodo.199376
ddf9fa0d-d20a-48d0-bb63-713f1d9a37f6
1175-5326
199376
Gorditus rotundus
Ratcliffe
,
new species
(
Figs. 1–5
)
Type
material.
Holotype
male, labeled “
Mina Carlota
/
Trinidad
Mts/VII. ’39
CUBA
/Parsons” and with my red
holotype
label.
Holotype
deposited at the
U. S.
National Collection (Smithsonian Institution, Washington, D. C.,
USA
).
Holotype
.
Male. Length 21.9 mm; width 12.4 mm. Form rotund, highly vaulted in lateral view. Color dark reddish brown.
Head
:
Frons on anterior half with large, confluent punctures, posterior half with only a few sparse punctures. Frontoclypeal region at center with low, transverse swelling. Clypeus with surface similar to that of anterior half of frons, lateral margin constricted before ocular canthus; apex attenuate, narrowly truncate, weakly reflexed. Interocular width equals 6.0 transverse eye diameters. Antenna with 10 antennomeres, club short, subequal in length to antennomeres 2–7. Mandibles exposed, subtriangular.
Pronotum
:
Surface punctate; punctures large, deep, moderately dense in anterior two thirds, sparse in posterior third, becoming denser in anterior angles. Disc lacking tubercle or fovea. Base with marginal bead, bead obsolete at center. Lateral margins with sparse, very long, reddish brown setae.
Elytra
:
Sutural stria impressed. Surface nearly smooth, with minute, sparse punctures on sides in posterior half.
Pygidium
:
Surface
densely, completely rugulopunctate, with traces of a few long setae basolaterally on one side. In lateral view, surface regularly convex.
Legs
:
Protibia vaguely quadridentate, teeth subequally spaced from one another, basal tooth greatly reduced. Metatibia at apex truncate, with 12 bristles on left leg (some broken off), 19 on right leg. Protarsomeres 3–5 on right leg missing. Metatarsomeres 4–5 on left leg missing.
Ve n te r
:
Metasternum densely, setigerously punctate in anterior half, nearly smooth on posterior half; setae long, dense, reddish brown. Prosternal process small, laminate, narrowly subtriangular, hidden by long setae. Abdominal spiracles large, directed posteriorly.
Parameres
:
Figs. 3–4
. Form simple, slightly tapering to apices.
Etymology.
The specific epithet is from the Latin
rotundus
, meaning round; used here in reference to the distinctly globular body form.
Distribution.
Gorditus rotundus
is known only from the
Trinidad
Mountains in Cienfuegos Province in south central
Cuba
(
Fig. 5
).
FIGURE 5.
Topographic map of Cuba showing highland areas (shaded) and distribution of
Gorditus rotundus
. Map courtesy of Sadalmelik, Wikimedia Commons.
Locality records.
1 specimen
examined.
CUBA
(1):
CIENFUEGOS (1):
Mina Carlota
(
Trinidad
Mountains).
Temporal distribution.
July (1).
Diagnosis.
The generic diagnosis above will suffice, since there is only this single species known. Females of
G. rotundus
remain unknown.
Natural history.
Nothing is known of the life history of this species. The
type
locality is approximately
450 m
in elevation.