New crickets of the subfamilies Phaloriinae and Pteroplistinae (Orthoptera: Gryllidae) from Singapore
Author
Gorochov, Andrej V.
Author
Tan, Ming Kai
text
Zootaxa
2012
3525
18
34
journal article
10.5281/zenodo.214470
36bfe153-09d4-48c1-be84-9ce1765005c6
1175-5326
214470
Phaloria
?
jerelynae
Gorochov et Tan,
new species
(
Figs 11, 12
,
19, 20
,
35–43
)
Material examined.
Holotype
(male):
Singapore
, Bukit
Timah
Nature Reserve, along main road Hindhede Drive, near Simpang Hut, secondary forest,
19 May 2011
, coll. M.K. Tan & L.F. Cheong.
Paratypes
:
Singapore
:
1 male
, same locality as for
holotype
,
24 October 2011
, M.K. Tan, R.W.J. Ngiam & L.F. Cheong;
1 male
, same locality,
8 January 2012
, coll. M.K. Tan & J.J.Y. Chan;
1 male
, same locality,
22 February 2012
, coll. M.K. Tan.
Diagnosis.
This species differs from representatives of the subgenera
Phaloria
and
Papuloria
Gorochov (Gorochov, 1996)
in the absence of additional lobes, lobules and hooks between posterolateral processes of epiphallus and on their inner sides. It differs from a single species of the subgenus
Sulaweloria
Gorochov (Gorochov, 2011)
in the guiding rod completely sclerotized and not fused with endoparameres as well as posterolateral epiphallic processes much longer and median (anterior) part of epiphallus distinctly longer (not in shape of transverse ribbon). These differences of the new species do not allow us to understand its systematic position; it may be a specialized representative of
Phaloria
s. str.
or of
Papuloria
, but also it may belong to a new subgenus of
Phaloria
s. l.
or to a new genus of
Phaloriini
.
Description.
Male
holotype
. General appearance more or less similar to that of
Tremellia timah
(as in
Figs 35–37
), but distinguished by following characters of coloration and external body structure: pronotum purple with lateral lobes having two distinct yellowish spots (these spots occupying about half of lateral lobes; as in
Fig. 36
); abdominal tergites yellowish but irregularly marbled greyish purple; abdominal sternites and subgenital plate greyish purple; fore tibia with inner tympanum slightly smaller than in
Tremellia timah
(
Fig. 11
) and with outer tympanum almost equal to inner one in size; length of longest inner distal spine
1.5 mm
; length of longest inner dorsal spur
2.9 mm
.
Tegmina with 7 oblique veins in dorsal field (2 proximal oblique veins small), with mirror slightly less transverse than in
Tremellia timah
and having distal dividing vein sinuous, with apical area very short, with lateral field having about 24 branches of Sc and 7 crossveins between R and M (as in
Fig. 38
); stridulatory vein of right tegmen weakly arcuate and with 18–19 stridulatory teeth per mm at median region of this vein (
Fig. 42
); anal plate with dorsolateral ridges, with shallow concavity near middle and with distal part obtusely truncate and emarginate; subgenital plate with proximal half wide and with distal half narrowed; apex of this plate almost truncate but with small posteromedian notch (
Fig. 12
).
FIGURES 25–27.
Tremellia timah
sp. n.
(
Phaloriinae
), general view: 25, 26, male (holotype) from above (25) and from side (26); 27, female from above. Scale bars 5 mm.
Genitalia: epiphallus moderately long in median (anterior) part and with a pair of very long posterolateral processes having weak subapical widening and apical part directed partly aside; ectoparameres moderately large, elongate, lobe-like, and with distal part somewhat twisted; endoparameres large, with posterolateral arms strong but not long, with apodemes rather long, and with medial projections comparatively short and not fused with each other; guiding rod in shape of rather small and elongate plate not fused with mold of spermatophore attachment plate; this mold moderately long and not wide, with deep posteromedian notch (as in
Figs. 19, 20
,
39–41
); rami gently convex with short ends pointing inwards.
Variations. Right tegmina of some
paratypes
with 8 oblique veins in dorsal field.
Female. Unknown.
Measurements. See
Table 3
.
TABLE 3.
Measurements of
Phaloria
? jerelynae
(in mm, mean values in brackets).
|
BL
|
BWL
|
PL
|
PW
|
TL
|
TW
|
HFL
|
HTL
|
| Male holotype |
15.0 |
17.0 |
2.9 |
3.8 |
13.0 |
7.1 |
13.5 |
13.6 |
| Male paratype 24 Oct.2011 |
14.6 |
16.8 |
2.8 |
3.6 |
12.8 |
7.5 |
12.4 |
13.1 |
| Male paratype 8 Jan.2012 |
14.0 |
16.0 |
2.7 |
3.5 |
13.0 |
7.0 |
12.2 |
12.5 |
| Male paratype 22 Feb.2012 |
14.0 |
16.5 |
2.9 |
3.7 |
13.1 |
7.0 |
12.0 |
12.4 |
| Males (n = 4) |
14.0–15.0 (14.4) |
16.0–17.0 (16.6) |
2.7–2.9 (2.8) |
3.5–3.8 (3.7) |
12.8–13.1 (13.0) |
7.0–7.5 (7.2) |
12.0–13.5 (12.5) |
12.4–13.6 (12.9) |
Etymology.
The species is named in honour of Chan Jia Yee Jerelyn, a friend of the junior author.
Remarks.
Calling song was recorded in-situ on
24 October 2011
at about 2015 hours. The calling song is a series of repeated double chirps with frequency of 4.0–4.5 kHz (
Fig. 43
). Each chirp lasts 0.12–
0.13
s (mean =
0.12 s
) and consists of 7–8 peaks (mean = 7). Pauses between each chirp last 0.16–
0.20
s (mean =
0.17 s
). Pauses between each series last 0.86–
1.38
s (mean =
1.11 s
). The southern part of
Malacca
is here indicated as a possible most western locality for the genus
Phaloria
Stål
, excepting only very widely distributed (from Java to
Seychelles
)
Phaloria insularis
.