Monographic revision of the genus Aegidinus Arrow (1904) and generic phylogeny of the world Orphninae (Coleoptera: Scarabaeidae: Orphninae).
Author
Colby, Julia
text
Insecta Mundi
2009
2009-05-08
2009
76
1
41
journal article
10.5281/zenodo.5352584
1942-1354
5352584
Aegidinus tricornis
Colby
,
new species
Fig. 75
, 93
Type Material.
Holotype
female at
HAHC
labeled: a) “Ven:
Bolivar
//
10 km
N
Corocito
// 18. VI-3. VIII. 87 // S& J Peck,
FIT
//
R
. Caura rainforest”(printed, rectangular label)/ b) “
Aegidinus
//
guianensis
// (Westw.)
Det H.F. Howden
88”(handwritten and printed rectangular label with a black border)/ c)
my handwritten
holotype
label.
Paratypes
: Two
paratype
females at
CMNC
with same label data as
holotype
, but with my printed
paratype
label. One
paratype
female at
HAHC
labeled: a) same as
holotype
/ b) H. & A.
Howden Collection Ottawa,
Canada
” (printed, rectangular label with a black border). One
paratype
female at
CNMC
labeled: a) same as
holotype
/b)
as (b) above /c) “
Aegidinus
// nr.
guianensis
//
(West.) DET H. F. Howden 98” (handwritten and printed rectangular label with black border).
Type locality.
Venezuela
,
Bolivar
, Corocito (10
km N).
Description.
Holotype
female
. Length
9.8 mm
,
Figure 93.
Distributional map for
A. tricornus
,
A. unicus
, width
5.8 mm
.
Color
: Head, pronotum, elytra, and
A. venezuelensis
.
legs, and venter piceous to reddish brown.
Head
:
Frons punctate; punctures moderately dense, moderate in size. Frontoclypeal suture present. Clypeus moderately densely punctate, punctures moderate in size. Anterior margin of clypeus with marginal bead.
Pronotum
: Surface punctate; punctures sparse to dense, large. Basal margin of pronotum with bead and row of punctures, punctures obsolete medially. Short, longitudinal, shallow sulcus present just anterior of basal margin. Anterior margin with small, median boss.
Scutellum
: One
moderate sized puncture at base.
Elytra
: Punctures of striae elongate, vermiform, or V-shaped (at base). Stria 1 obsolete at base. Lateral margin adjacent to humerus with 7 setose crenulations.
Genitalia
:
Fig. 75
.
Paratypes
.
Four females. Length: 8.0-
9.8 mm
; width
4.5-5.1 mm
.
Paratypes
differ from
holotype
in the following respects:
Head
: Frontoclypeal suture present or not.
Pronotum:
Punctures on basal margin sometimes contiguous, forming a line. Sulcus anterior of basal margin expressed as a sulcus, a depression, or absent. Median boss on anterior margin present or not.
Scutellum
: Surface
with a median puncture or not.
Elytra
: Stria 2 variably obsolete. Lateral margin adjacent to humerus with 5-7 setose crenulations.
Diagnosis.
This species is best diagnosed using the female genital sclerites. The superior and inferior plates are fused, and the accessory sclerite projects from the face of the fused sclerites (
Fig. 75
). No males are known for this species.
Etymology.
From the Latin “
tri
” meaning three and “
cornus
” meaning crowned, in reference to the appearance of a crown with three points given by the lobes on each mandible and the shape of the labrum.
Distribution (
Fig. 93). Venezuela. Five specimens examined from CMNC and HAHC.
VENEZUELA
(5):
Bolivar
: Corocito (
10 km
N) (5).
Temporal Distribution.
June-August (5).
Natural History.
Nothing is known about the natural history of this species.