Biogeographical and evolutionary aspects of a Guineo-Congolian bushcricket tribe: Revision of the genera Cestromoecha Karsch, 1893 and Poreuomena Brunner von Wattenwyl, 1878, with the description of new species (Orthoptera, Tettigoniidae, Phaneropterinae)
Author
Hemp, Claudia
https://orcid.org/0000-0001-9170-7113
Dept Plant Systematics, Univ. of Bayreuth, Germany
claudia.hemp@uni-bayreuth.de
Author
Massa, Bruno
https://orcid.org/0000-0003-2127-0715
Dept of Agriculture, Food and Forest Sciences, University of Palermo, Italy
text
Deutsche Entomologische Zeitschrift
2021
2021-01-05
68
1
45
79
http://dx.doi.org/10.3897/dez.68.60193
journal article
http://dx.doi.org/10.3897/dez.68.60193
1860-1324-1-45
227B739469C5447FB984250DF1ADFBE1
EE57E5591FE3500892459D0CF4FBB496
4435456
Poreuomena crassipes Karsch, 1890
stat. rev.
Figs 36-40
Poreuomena crassipes
Karsch, 1890. Entom. Nachricht. 16: 364; Type locality: Cameroon (MfN).
Material examined.
Central African Republic
,
Dzanga-Ndoki National Park
, Ndoki, Lake 1,
UV trap
1,
31.I.-2.II.2012
(
♂
)
;
11-12.II.2012
(
♂
)
;
20-23.II.2012
(
♂
);
Central African Republic
,
Dzanga-Ndoki NP
, Lake 1, camp 1,
15-16.II.2012
(
♂
)
;
Central African Republic
,
Dzanga-Ndoki NP
, Lake 1,
UV trap
2,
15-16.II.2012
(
♂
)
;
Central African Republic
,
Dzanga-Ndoki NP
, Lake 1,
11-12.II.2012
(light) (
3♂
)
; Lake 3,
25-26.II.2012
(light) (
1♂
) (BMPC);
Central African Republic
,
Dzanga-Ndoki NP
, Lake 1,
29-30.XI.2010
(
1♂
,
1♀
)
;
30.XI-1.XII. 2010
(light) (
1♂
)
(PAPC).
Diagnosis.
Morphologically closely related to
P. biaculeata
sp. nov. and
P. wilverthi
. All three species share a similar 10th abdominal tergite that is flap-like, deeply divided into two lobes in
P. biaculeata
sp. nov. (Figs
33
,
34
), with an indentation only at its posterior margin and a central furrow in
P. wilverthi
(Fig.
107
) and with only a shallow groove medially in
P. crassipes
(Fig.
40
). The cerci of the three species are also similar, stout at their bases, narrowed halfway into a sclerotised tip in
P. biaculeata
sp. nov. (Figs
33
,
34
), evenly tapering into a tiny sclerotised tip in
P. wilverthi
(Figs
104
,
106
) and stout in
P. crassipes
with two sclerotised dents at their apices (Figs
39
,
40
).
Description.
Karsch (1890
, p. 364, note 1) described very briefly only the female of
C. crassipes
from Cameroon.
Massa (2013)
described the male. The 10th tergite is apically rounded with a clear bilobate incision (Fig.
40
); the cerci are robust, up- and incurved, their apex is sharply narrowed and pointed (Figs
39
,
40
). The subgenital plate is not long, but clearly bilobate (Fig.
40
). The stridulatory area of the left tegmen is black, short and straight (Fig.
37
) and the stridulatory file has ca. 40 teeth, apically upcurved (Fig.
38
).
Measurements
(mm).
Males. Body length: 17.3-19.6; pronotum length: 3.8-4.1; pronotum height: 3.3-3.6; length of hind femora: 19.3-20.2; length of tegmina: 27.3-30.6.
Distribution.
P. crassipes
is known from Cameroon (
Karsch 1890
;
Ragge 1968
), the Central African Republic (
Massa 2013
;
Massa et al. 2020
), the Democratic Republic of the Congo and the Ivory Coast (
Ragge 1967
;
1968
).
Figures 36-40.
Morphological details of male
Poreuomena crassipes
. Habitus (
36
), stridulatory area (
37
), stridulatory file on the underside of the left tegminal flap (
38
), lateral (
39
) and rear view (
40
) on apex.