On the adult female of Oiclus nanus Teruel et Chazal, 2010 (Scorpiones: Scorpionidae: Diplocentrinae)
Author
Teruel, Rolando
Author
Chazal, Léonard
text
Euscorpius
2010
2010-12-31
106
106
1
6
https://mds.marshall.edu/euscorpius/vol2010/iss106/1/
journal article
10.18590/euscorpius.2010.vol2010.iss106.1
1536-9307
12782452
Oiclus nanus
Teruel et Chazal, 2010
Figures 1–4
;
Table 1
Oiclus nanus
Teruel & Chazal, 2010: 1–9
, figs 1–5, tab. 1.
Diagnosis
(emended): species of small size (males
20–23 mm
, female
22 mm
) for the genus. Body light brown, diffusely patterned with dark brown; legs yellowish; pedipalps and metasoma with carinae and fingers faintly infuscate. Entire body conspicuously hirsute in males (especially on pedipalps, mesosoma and metasoma), less densely hirsute in females and juveniles. Carapace polished in both sexes, in males with very finely and densely granulose areas symmetrically scattered, in females entirely smooth; tergites in males finely and densely granulose, in females with very subtle vestiges of coarse granules scattered over posterior region. Punctate tegument restricted to pedipalp patella and chela in adults, absent in juveniles. Pedipalp chela robust and with dorsoexternal surfaces granulose and strongly reticulate in males, slender and with dorsoexternal surfaces smooth in females. Metasoma moderately to weakly carinated in dorsal and lateral surfaces, intercarinal tegument smooth and polished. Pectines with fulcra variable from moderately well developed to essentially absent; tooth count 7/
7 in
males, 6/
6 in
females. Modal tarsal spine formula 3/3: 4/4: 5/5: 5/5.
Adult Female
: it differs from the
holotype
and
paratype
males by the following characters:
(1)
genital operculum completely fused by a membranous connection (
Fig. 2d
);
(2)
genital papillae absent (
Fig. 2d
);
(3)
pectines comparatively smaller, with 6/6 teeth (
Fig. 2d
);
(4)
pedipalp chela much more slender and with longer fingers (
Fig. 2c
;
Tab. 1
);
(5)
metasoma less densely hirsute, with all segments comparatively shorter and wider, and with a much more enlarged telson (
Figs. 1a– b
,
2e–j
,
Tab. 1
);
(6)
carapace and tergites polished, at most with subtle vestiges of large granules (
Figs. 2a–b
);
(7)
mesosoma comparatively larger and wider (
Figs. 1a– b
,
2b
,
Tab. 1
).
Figure 1:
Adult female topotype of
Oiclus nanus
:
a)
entire dorsal view;
b)
entire ventral view.
Figure 2:
Adult female topotype of
Oiclus nanus
:
a)
carapace and tergite I;
b)
tergites II–VI;
c)
pedipalp, dorsal view;
d)
sternopectinal region;
e)
metasomal segments I–III, dorsal view;
f)
metasomal segments I–III, lateral view;
g)
metasomal segments I–III, ventral view;
h)
metasomal segments IV–V and telson, dorsal view;
i)
metasomal segments IV–V and telson, lateral view;
j)
metasomal segments IV–V and telson, ventral view.
4
Euscorpius
— 2010, No. 106
Figure 3:
Live specimens of
Oiclus nanus
:
a)
adult female topotype;
b)
adult female from Anse-Bertrand;
c)
juvenile topotype.
|
Dimensions
|
♀
topotype
|
♂
holotype
|
♂
paratype
|
| Carapace |
L / Wp |
3.05 / 2.90 |
2.70 / 2.70 |
3.20 / 3.10 |
| Mesosoma |
L |
7.00 |
5.80 |
6.50 |
| Tergite VII |
L |
1.50 / 2.70 |
1.20 / 2.30 |
1.50 / 2.80 |
| Metasoma |
L |
11.65 |
11.60 |
13.50 |
| Segment I |
L / W |
1.30 / 1.85 |
1.40 / 1.70 |
1.60 / 1.90 |
| Segment II |
L / W |
1.50 / 1.70 |
1.60 / 1.55 |
1.80 / 1.75 |
| Segment III |
L / W |
1.65 / 1.65 |
1.70 / 1.50 |
2.00 / 1.70 |
| Segment IV |
L / W |
2.00 / 1.60 |
2.00 / 1.40 |
2.30 / 1.60 |
| Segment V |
L / W / H |
2.55 / 1.45 |
2.50 / 1.35 |
2.90 / 1.55 |
| Telson |
L |
2.65 |
2.40 |
2.90 |
| Vesicle |
L / W / H |
1.90 / 1.50 / 1.10 |
1.70 / 1.20 / 1.00 |
2.10 / 1.40 / 1.10 |
| Aculeus |
L |
0.75 |
0.70 |
0.80 |
| Pedipalp |
L |
8.50 |
7.30 |
8.90 |
| Femur |
L / W |
2.00 / 0.95 |
1.80 / 0.90 |
2.10 / 1.00 |
| Patella |
L / W |
2.35 / 1.00 |
2.00 / 0.95 |
2.50 / 1.10 |
| Chela |
L |
4.15 |
3.50 |
4.30 |
| Hand |
L / W / H |
1.75 / 1.70 / 1.75 |
1.50 / 1.70 / 1.60 |
1.80 / 2.00 / 2.30 |
| Movable finger |
L |
2.40 |
2.00 |
2.50 |
| Total |
L |
21.70 |
20.10 |
23.20 |
Table 1:
Measurements of
Oiclus nanus
adult female; those of two adult male types have been included for comparison. Abbreviations: length (L), width (W), posterior width (Wp), depth (H).
Figure 4:
Mainland Guadeloupe, showing both confirmed (1–2) and putative (3–4) records for
Oiclus nanus
:
1)
Pointe des Châteaux;
2)
Anse-Bertrand;
3)
Terre-de-Haut;
4)
Bouillante. See details of putative records in Teruel & Chazal (2010: 8–9).
New Records:
Guadeloupe
,
Grande-Terre
,
Saint François
,
Pointe des Châteaux
(type locality); under rock in coastal forest,
16 February 2010
, leg.
L. Chazal
,
1♀
topotype
(RTO: Sco-0412),
5 juvenile
topotypes
.
AnseBertrand
(new record), under rock in coastal forest,
18 May 2010
, leg.
L. Chazal
,
1 ♀
(kept alive in captivity by
L. Chazal
)
.
Remarks:
the adult females now available allow improving the comparison of
O. nanus
to its morphologically closest relative
Oiclus questeli
Teruel, 2008
, from
Saint Barthélemy
. Apart from adult male differences, already discussed in the original description (Teruel & Chazal, 2010), adult females of
O. nanus
can be easily separated by having a greatly reduced granulation on tergites (essentially absent on carapace), presence of pectinal fulcra, weaker metasomal carinae (especially on segments III–IV) and metasomal segment III as long as wide. As opposite, adult females of
O. questeli
are characterized by having carapace and tergites moderately covered by coarse granules, absence of pectinal fulcra, somewhat stronger metasomal carinae, and metasomal segment III wider than long (
Teruel, 2008
).