Araeoncus longispineus, Song & Li, 2010

Song, Yanjing & Li, Shuqiang, 2010, The spider genera Araeoncus Simon, 1884 and Diplocephalus Bertkau, 1883 (Arachnida, Araneae, Linyphiidae) of China, Zoosystema 32 (1), pp. 117-137 : 125-128

publication ID	https://doi.org/ 10.5252/z2010n1a6
DOI	https://doi.org/10.5281/zenodo.4549316
persistent identifier	https://treatment.plazi.org/id/EA079A4C-FFC5-F922-FF27-7B440A6BFC0E
treatment provided by	Felipe
scientific name	Araeoncus longispineus
status	sp. nov.

Treatment

Araeoncus longispineus View in CoL n. sp.

( Figs 4 View FIG ; 5 View FIG )

TYPE MATERIAL. — Holotype: China, Sichuan Province, Jiulong County, Wuxuhai Lake, 29.05°N, 101.55°E, 26.VII.2006, coll. Y. Song & Y. Tong, ♂ ( MNHN). Paratype: same data as for holotype, 1 ♀ ( MNHN).

ETYMOLOGY. — Specific name from Latin adjective spineus = spiny, combined with prefix longi, in reference to a long spine on the cymbial retrobasal process of the male palp.

DISTRIBUTION. — Only known from Wuxuhai Lake in Sichuan Province, China ( Fig. 12 View FIG ).

DESCRIPTION

Male

Total length 1.69. Carapace 0.74 long, 0.54 wide, dark brown, highly raised to form a large lobe carrying posterior median eyes, as well as several hairs scattered in the ocular area; a sulcus running back from each posterior lateral eye ( Fig. 5A View FIG ). Abdomen dark grey. Clypeus 0.14 high. AME diameter 0.04, ALE 0.05, PME 0.04, PLE 0.03, AME interdistance0.67 times their diameter, AME-ALE interdistance 1.50 times ALE diameter, PME interdistance 2.43 times their diameter, PME-PLE interdistance 4.00 times PLE diameter. Sternum 0.38 long, 0.39 wide. Coxa IV interdistance 1.22 times their width. Chelicerae with 5 promarginal teeth, 5 retromarginal teeth ( Fig. 5C View FIG ). Tibia I 5.50times longer than deep.Tm I 0.43,Tm IV absent.Dorsal spines on tibia of leg IV:2-2-1-1; dorsal spine on patella of leg IV:1-1-1-1. Leg measurements: I: 1.79 (0.53, 0.18, 0.41, 0.39, 0.29); II: 1.70 (0.48, 0.18, 0.38, 0.36, 0.31); III: 1.43 (0.41, 0.18, 0.30, 0.30, 0.25); IV: 1.88 (0.55, 0.18, 0.44, 0.43, 0.28). Palp: tibia with 1 claviform prolateral apophysis, membranous near its junction with tibia; with 1 prolateral and 1 retrolateral trichobothrium ( Fig. 4D View FIG ). Cymbial retrobasal process ( Fig. 4C View FIG ) with a strong obliquely upwards spine ( Fig. 4D View FIG ). Paracymbium spiral, with terminal part hooked ( Fig.4C View FIG ).Tegulum distal to subtegulum in unexpanded palp ( Fig. 4C View FIG ). Protegulum vestigial ( Fig.4A View FIG ). Suprategulum with a dentiform marginal apophysis and a bifurcate distal apophysis ( Fig. 5B View FIG ). Embolic division ( Fig. 5D, E View FIG ): anterior radical process relatively long and narrow compared with A. hyalinus n. sp., with an extra tooth behind; mesal tooth long claviform, pointed distally; posterior radical process broad at the base, strongly narrowed and pointed distally, accompanied by a strongly sclerotized long embolus which is evenly elongate at first but expanded abruptly near the end; embolic membrane wide with almost parallel margins; tailpiece slightly upwards, with distal end extended downwards to hold suprategulum ( Figs 4A View FIG ; 5E View FIG ).

Female

Total length 1.69. Carapace 0.70 long, 0.53 wide, similar to male in general appearance and coloration, but without cephalic lobe and sulci. Clypeus 0.09 high.AME diameter 0.03, ALE 0.06, PME 0.05, PLE 0.05, AME interdistance 0.45 times their diameter, AME-ALE interdistance 0.78 times ALE diameter, PME interdistance 0.76 times their diameter, PME-PLE interdistance 0.76 times PLE diameter.Sternum 0.38 long, 0.39 wide. Coxa IV interdistance 1.30 times their width. Chelicerae with 6 promarginal teeth, 5 retromarginal teeth.Tibia I 5.08 times longer than deep. Tm I 0.39, Tm IV absent. Dorsal spines on tibia of leg IV: 2-2-1-1; dorsal spine on patella of leg IV: 1-1-1-1. Leg measurements:I: 1.78 (0.51, 0.18, 0.38, 0.38, 0.33); II: 1.68 (0.49, 0.17, 0.37, 0.34, 0.30); III: 1.49 (0.43, 0.17, 0.31, 0.32, 0.26); IV: 1.93 (0.58, 0.18, 0.48, 0.40, 0.29).

Epigynum with similar postero-median triangular prolongations as those of A. hyalinus n. sp. ( Fig. 5G View FIG ). Dorsal plate rectangular ( Fig. 5F View FIG ). Spermathecae U-shaped; the short arm longer than half of the long arm ( Fig. 5H View FIG ). Copulatory ducts enclosed in a slightly sclerotized capsule, with almost the same path as A. hyalinus n. sp., but narrower than the former ( Fig. 5F, H View FIG ). Fertilizaiton ducts short, mesally oriented ( Fig. 5F View FIG ). The path of copulatory duct is shown in Figure 5F. View FIG

REMARKS

Araeoncus longispineus n. sp. is closely related to A. hyalinus n. sp. See the remarks under A. hyalinus n. sp. for details. Specimens of A. longispineus n. sp. were found among the roots of moss in a mountain, at an altitude of 3500 m.