A taxonomic revision of the genus Scybalocanthon Martínez, 1948 (Coleoptera Scarabaeidae: Scarabaeinae: Deltochilini)
Author
Silva, Fernando A. B.
Universidade Federal do Pará, Instituto de Ciências Biológicas, setor de Zoologia, Campus Belém. Rua Augusto Corrêa, 01. Guamá. Belém PA 66075 - 110, Brazil. E-mail: fernandoabsilva @ yahoo. com. br
Author
Valois, Marcely
Programa de Pós-graduação em Zoologia, Universidade Federal do Pará / Museu Paraense Emílio Goeldi. Rua Augusto Corrêa, 01. Guamá. Belém PA 66075 - 110, Brazil.
text
Zootaxa
2019
2019-07-08
4629
3
301
341
journal article
21174
10.11646/zootaxa.4629.3.1
9419bc9b-dbe4-426c-a34e-f0034848ff99
1175-5326
3995508
1D47B452-0A40-4BC5-9BBA-C06DEB298C9A
Scybalocanthon adisi
Silva & Valois
,
new species
(
Figs. 1B
,
4B
,
5B
,
6A
)
Etymology.
Named in honor of Dr. Joachim Adis, who collected some of the
type
specimens.
Diagnosis
. Specimens of
S. adisi
(
Fig. 1B
) are similar to those of
S. aereus
(
Fig. 1C
) in body coloration; aedeagus with parameres elongate, subrectangular, not excavated ventrally (
Figs. 4
B–C); and endophallus lacking bristles or microbristles close to the FLP sclerite (
Figs. 5
B–C). However,
S. adisi
can be easily distinguished by the lack of a carina at the anterior portion of the eighth elytral stria.
Description. Body.
Oval, lateral edges rounded. Surface opaque, completely microgranulate.
Color
. Pronotum, hypomera (except internal margin), metaventrite, abdominal ventrites, pygidium, middle of femora, and tibiae yellow or light brown. Head, internal margin of hypomera, prosternum, mesoventrite, mesoepisternae, metaepisternae, elytra, trochanters, and proximal and distal portions of femora dark brown.
Length.
6.0–
8.9 mm
.
Thorax
. Anterior angles of pronotum acute (approximately 85°). Lateral margin regularly curved outward, not forming an angle at the middle portion.
Elytra
. Striae thin and opaque, weakly impressed, punctures inconspicuous. Interstrial surface with ocellar punctures, microgranulate. Eighth stria effaced at the basal third, lacking carina at the anterior portion.
Aedeagus.
Parameres symmetrical and elongate, with subrectangular shape, truncate apically (
Fig. 4B
). Dorsal and ventral margins of parameres substraight. SRP circular, with substraight handle-shaped extension (
Fig. 5B
). FLP I-shaped (
Fig. 5B
). A+SA with two superposed and elongate sclerites (
Fig. 5B
).
AS
as in
Fig. 5B
.
Type material.
Holotype
.
BRAZIL
:
AMAZONAS
:
Rio Taruma Mirim
NW Manaus
,
24.xi.1976
, J. Adis—
1♂
(
CEMT
)
.
Paratypes
.
BRAZIL
: AMAZONAS,
Ega
[=
Tefé
] (
3°22’S
,
64°42’W
), [no date], [anonymous]—
1♂
(
CMNC
)
;
Rio Tarumã Mirim
,
NW Manaus
(
3°0’58’’S
,
60°10’30’’W
),
13.i.1977
, J. Adis—
1♂
(
CMNC
)
;
Rio
Ta- rumã
Mirim
,
NW Manaus
(
3°0’58’’S
,
60°10’30’’W
),
16.ii.1977
, J. Adis—
1♂
(
CMNC
)
;
Rio Tarumã Mirim
,
NW Manaus
(
3°0’58’’S
,
60°10’30’’W
),
27.iv.1977
, J. Adis—
1♂
(
CMNC
)
;
Rio Tarumã Mirim
,
NW Manaus
(
3°0’58’’S
,
60°10’30’’W
),
11.v.1977
, J. Adis—
1♀
(
CMNC
)
;
Rio Tarumã Mirim
,
NW Manaus
(
3°0’58’’S
,
60°10’30’’W
),
8.ii.1977
—
1♀
(
CEMT
)
.
ECUADOR
:
PASTAZA
:
Lorocachi
,
220 m
,
16–27.ii.1996
,
Mayala C.
Carpio—
1♀
(
CEMT
)
.
Distribution.
Known from
Brazil
(Amazonas) and
Ecuador
(
Fig. 6A
).
Endemism areas
:
Brazilian sub-region
: Boreal Brazilian dominion:
Napo
and Imerí provinces (see
Morrone 2014
; fig. 12).