Research Article |
Corresponding author: Feng Zhang ( dudu06042001@163.com ) Academic editor: Shuqiang Li
© 2018 Bao-Shi Zhang, Feng Zhang.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Zhang B-S, Zhang F (2018) Three new species of the spider genus Asceua from Malaysia (Araneae, Zodariidae). ZooKeys 789: 37-49. https://doi.org/10.3897/zookeys.789.24261
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Three new species of the genus Asceua Thorell, 1887, from the natural forests of Malaysia, are described as Asceua bifurca sp. n. (♂♀), A. curva sp. n. (♂), and A. trimaculata sp. n. (♀). The genus Asceua is reported from Malaysia for the first time.
description, distribution, Southeast Asia, taxonomy, Zodariid
Members of the ant spider family Zodariidae Thorell, 1881 are small to medium-sized. It contains 85 genera and 1141 known species worldwide (
At present, the genus includes 26 species worldwide (
During the examination of spider collections from Malaysia, three new Asceua species were recognized and are described here as Asceua bifurca sp. n., A. curva sp. n., and A. trimaculata sp. n.
All specimens have been kept in 75% ethanol and were examined, drawn, and measured under a Tech XTL-II stereomicroscope equipped with an Abbe drawing device. Photos were taken with a Leica M205A stereomicroscope fitted with a Leica DFC550 Camera and LAS software (Ver. 4.6). Carapace length was measured medially from the anterior margin to the rear margin of the carapace. Eye sizes were measured as the maximum diameter of the lens in dorsal or frontal view. The measurements of legs are shown as total length (femur, patella, tibia, metatarsus, tarsus). Only one specimen of paratypes was measured. The epigynes were cleared in a warm solution of potassium hydroxide, and transferred to 75% ethanol for drawing. All measurements are in millimeters. All specimens studied are deposited in the Museum of Hebei University (MHBU), Baoding, China.
The following abbreviations are used:
ALE anterior lateral eyes;
AME anterior median eyes;
C conductor;
CD copulatory ducts;
dRTA dorsal apophysis of retrolateral tibial apophysis;
E embolus;
MA median apophysis;
MOA median ocular area;
PLE posterior lateral eyes;
PME posterior median eyes;
RTA retrolateral tibial apophysis;
S spermatheca;
T tegulum;
vRTA ventral apophysis of retrolateral tibial apophysis.
Holotype ♂, Malaysia, Sabah, Jalan Tambunan, Penampang, 05°48.739'N, 116°20.522'E, elev. 1583 m, 16 October 2015, Z.Z. Gao leg. Paratypes: 1 ♂ and 2 ♀, same data as holotype.
The males of A. bifurca are very similar to those of A. radiosa Jocqué, 1986 (from the Comoro Islands) in having a large concavity on the basal embolus and a short conductor. The two species can be easily distinguished by the conductor being bifurcated in the new species, while it is not bifurcated in A. radiosa. The posterior part of the dorsal abdomen has three white median bands in the new species that are absent in A. radiosa (Figs
The specific name is taken from the Latin word bifurca, in reference to the bifurcated tip of the conductor; adjective.
Male total length 2.11–2.18. Holotype total length 2.18; carapace 1.13 long, 0.86 wide; opisthosoma 1.00 long, 0.74 wide. Habitus shown as in Fig.
Palp (Figs
Female total length 2.21–2.34. One of the paratypes total length 2.34; carapace 1.10 long, 0.84 wide; opisthosoma 1.25 long, 0.92 wide. Habitus as in Fig.
Epigyne (Figs
Malaysia (Sabah).
Holotype ♂, Malaysia, Sabah, Pitas, 06°29.598'N, 117°18.499'E, elev. 45 m, 20 October 2015, Z.Z. Gao leg.
The male of this species resembles A. wallacei Bosmans & Hillyard, 1990 (from Sulawesi, Indonesia) in having the very complicated copulatory organ. The two species can be easily distinguished by: the thinner and longer retrolateral pointed processes of the distal conductor in the new species, which is shorter and bifurcated in A. wallacei; the longer posterior projection of the cymbium in the new species, which is shorter in A. wallacei; and the hook-like median apophysis which is almost straight in A. wallacei (Figs
The specific name is from the Latin word curvus, in reference to the shape of the posterior projection of the cymbium; adjective.
Male (holotype): Total length 3.15; carapace 1.39 long, 1.12 wide; opisthosoma 1.49 long, 1.17 wide. Habitus as in Fig.
Palp (Figs
Female unknown.
Malaysia (Sabah).
Eight described Asceua species from nearby countries are only based on female specimens: A. amabilis Thorell, 1897 (from Myanmar), A. anding Zhang, Zhang & Jia, 2012 (from China), A. daoxian Yin, 2012 (from China), A. elegans Thorell, 1887 (from Myanmar), A. kunming Song & Kim, 1997 (from China), A. longji Barrion et al. 2013 (from China), A. piperata Ono, 2004 (from Vietnam), and A. quinquestrigata (Simon, 1905) (from Java). The patterns of the dorsal opisthosoma of these species are different by comparisons of illustrations and descriptions. The first pair of transversal chevrons are reniform in the new species, but are oval or long ovoid in all the other species, except for A. quinquestrigata. However, the new species can be distinguished from A. quinquestrigata by the broad bands on its posterior opisthosoma, which are only small in A. quinquestrigata. Also, the other white patches and transversal stripes on the opisthosoma of the new species contrasts with the lack of stripes in the other seven species except for A. piperata. However, the new species can be distinguished from A. piperata by its immaculate carapace. This new species is thus less likely to be conspecific with any of these 8 species that are only known from female specimens.
Holotype ♀, Malaysia, Pahang, Cameron Highlands, Tanah Rata, 04°27.791'N, 101°22.091'E, elev. 1380 m, 22 October 2015, Z.Z. Gao leg. Paratype: 1 ♀, same data as holotype.
The females of this new species resemble those of A. lejeunei Jocqué, 1991 (from Congo) in having widely spaced copulatory openings, but can be distinguished by the absence of the paired patches of dorsal opisthosoma which are present in A. lejeunei (Fig.
The specific name is from the Latin words tri- and maculata, in reference to the three patches on the dorsal opisthosoma.
Female total length 2.33–2.48. Holotype total length 2.48; carapace 1.21 long, 0.91 wide; opisthosoma 1.24 long, 0.95 wide. Habitus as in Figs
Epigyne (Fig.
Male unknown.
Malaysia (Pahang).
Asceua septemmaculata (Simon, 1893a) was described based only on a male specimen from Cambodia. The patterning of the dorsal opisthosoma differ, in that the pairs of white patches present in A. septemmaculata are absent in the new species, and it is unlikely that the latter is conspecific with A. septemmaculata.
There are five Asceua species in the adjacent region that are lacking illustrations: A. bimaculata (Simon, 1904) (from Vietnam), A. heliophila (Simon, 1893b) (from Philippines), A. septemmaculata, A. amabilis and A. quinquestrigata. The descriptions of the sexual organs were very simple. The three new species described here have to be distinguished by different patterns of the dorsal opisthosoma. Asceua trimaculata sp. n. lacks pairs of white patches that all the five known species above possess. Asceua bifurca sp. n. differs from the five species by the rectangular white bands on its dorsal opisthosoma. Asceua curva sp. n. differs from them by possessing the chevron patterning.
We are grateful to Dr. Shuqiang Li, Dr. Yuri Marusik and Zhisheng Zhang for valuable suggestions, and to the linguistic editor for improving the English. We are also grateful to Zhizhong Gao for the collection of specimens. This study was supported by funding from the National Natural Science Foundation of China (31471969) and by the Natural Science Foundation of Hebei Province (C2017104011) to Bao-Shi Zhang.