A review of Peruvian diving beetles of the genus Hydaticus Leach, 1817, with description of Hydaticus (Prodaticus) panguana sp. nov. and notes on other Neotropical species (Coleoptera: Dytiscidae)
Author
Megna, Yoandri S.
SNSB-Zoologische Staatssammlung München, Münchhausenstrasse 21, 81247 München, Germany & Present address: Departamento de Biología, Universidad de Oriente. Patricio Lumumba s / n, Santiago, Santiago de Cuba, Cuba. Emil-Überall-Str. 29, 01159 Dresden, Germany
Author
Balke, Michael
SNSB-Zoologische Staatssammlung München, Münchhausenstrasse 21, 81247 München, Germany
Author
Apenborn, Rico
Author
Hendrich, Lars
SNSB-Zoologische Staatssammlung München, Münchhausenstrasse 21, 81247 München, Germany
text
Zootaxa
2019
2019-06-12
4615
1
113
130
journal article
21179
10.11646/zootaxa.4615.1.5
5cad0e06-2a49-4dc6-bfac-9f00391b5d9b
1175-5326
3995398
2A000D68-CA54-4077-AA8C-50B4455E6A23
Hydaticus xanthomelas
(
Brullé, 1837
)
(
Figs. 2D
,
7
)
Dytiscus xanthomelas
Brullé, 1837: 47
.
Hydaticus xanthomelas
(
Brullé, 1837
)
;
Aubé 1838:181
;
Trémouilles 1996:18
;
Benetti & Hamada 2003: 704
; Ferreira (Jr.) &
Braga 2009: 324
;
Miller & Bergsten 2014: 74
;
Miller & Bergsten 2016: 119
;
Nilsson & Hájek 2019: 97
.
Hydaticus rectus
Sharp 1882a: 655
; synonymy by
Trémouilles 1996: 18
.
Type
locality.
Argentina
,
Paraná river
,
Corrientes
.
Material examined.
PERU
: “Peru,
Huánuco
Department
,
Yuyapichis
,
Panguana Stat.
, 2.-
18.10.2009
, -
9.616667S
, -
74.9333W
,
Burmeister
leg.”,
1 ex.
, (
ZSM
)
;
“
Peru
,
Huánuco
Department
,
Panguana
,
Yuyapichis river
,
25.vii.2013
, -
9.616667S
, -
74.9333W
, at light,
R. Apenborn
leg.”,
2 exs.
, (
ZSM
)
.
PARAGUAY
: “Paraguay,
Dept. Central
,
Asuncion
,
2.X.1992
, leg.
Drechsel
”,
8 exs.
, (
CGW
)
;
“
Paraguay
,
Dept.
Guaira
,
Garay
,
13.-15.X.1992
, leg.
Drechsel
”,
1 ex.
, (
CGW
)
;
“
Paraguay
,
Chaco Department
Hayes,
Montelindo
,
2.xi.1991
,
U. Drechsel
leg.”,
15 exs.
, (
CLH
,
ZSM
)
;
“
Paraguay
, Amanbay P. N.,
Cerro Cora
,
10.ii.1997
,
Drechsel
leg.”,
3 exs.
(
CLH
)
;
“
Paraguay
,
Chaco Department
Hayes,
Pozo Colorado
,
Drechsel
leg.”,
2 exs.
, (
CLH
)
;
“
Paraguay
,
Central Department
,
Capiatá
,
ii.1995
”,
5 exs.
, (
NMW
)
;
“
Paraguay
,
Central Department
,
Cerro Lambaré
,
1-xi.1992
,
Drechsel
leg.”,
17 exs.
, (
NMW
)
;
“
Paraguay
,
Guairá Department
,
Garay
,
6-x.1992
,
Drechsel
leg.”,
7 exs.
, (
NMW
)
.
BRAZIL
: “Brasilien,
São Paulo
,
Sammlung A. Zimmermann
”,
1 ex.
, (
ZSM
)
;
“
Brasilien
,
São Paulo
,
Tiete Floresta
,
17.x. 1900
, Sammlung A. Zimmermann”,
1 ex.
, (
ZSM
)
;
“
Brasilien
,
Sammlung
A. Zimmermann”,
1 ex.
, (
ZSM
)
.
FIGURE 2.
Dorsal habitus of
H. panguana
sp. nov.
(A),
H. lateralis
(B),
H. subfasciatus
(C) and
H. xanthomelas
(D). All specimens collected in Panguana, Peru. Scale bar = 5 mm.
FIGURE 3.
Dorsal habitus of
H. fractivittis
(A) and
H.
palliatus
(B), both from Paraguay, and
H. rimosus
(C) from Guatemala. Scale bar = 5 mm.
FIGURES 4–7.
Median lobe of aedeagus in dorsal (A) and lateral view (B):
H. panguana
sp. nov.
(4),
H. lateralis
(5),
H. subfasciatus
(6), and
H. xanthomelas
(7). Scale bar = 1 mm.
Diagnosis.
TL=
9.6–10.4 mm
; TL-H =
8.9–9.7 mm
; MW
4.9–5.4 mm
; pronotum testaceous with a black band on the anterior and posterior margin; elytron with basal fasciae not confluent with subbasal, longitudinal and yellowish stripe (
Fig. 2D
); elytron with sublateral and lateral yellow stripes together or separate, forming a lateral and broad longitudinal band. Protarsomere I without a series of spines across the dorsal surface; metatibia with bifid setae parallel to dorsal margin on posterior surface; median lobe of aedeagus with apex rounded in lateral view, and sinuate on preapical dorsal margin (
Fig. 7
).
Differential diagnosis.
Hydaticus xanthomelas
is the smallest Neotropical species of the genus, which can easily be used to separate it from the other species with basal fasciae on elytra, such as
H. devexus
,
H. lateralis
and
H. subfasciatus
.
Distribution.
Hydaticus xanthomelas
has been recorded for
Brazil
,
Bolivia
,
Paraguay
and
Argentina
(
Trémouilles 1996
;
Benetti & Hamada 2003
; Ferreira (Jr.) &
Braga 2009
;
Miller & Bergsten 2014
). Its range of distribution has extended now northwards to
Peru
.
Ecology.
Hydaticus xanthomelas
was collected in lowland rivers and smaller streams, rich in submerged and emerged vegetation (
Trémouilles 1996
). The two specimens from Panguana were collected at light, not far away from an open cattle farming area near the research station.