Jacaena angoonae, Dankittipakul, Pakawin, Tavano, Maria & Singtripop, Tippawan, 2013

Dankittipakul, Pakawin, Tavano, Maria & Singtripop, Tippawan, 2013, Revision of the spider genus Jacaena Thorell, 1897, with descriptions of four new species from Thailand (Araneae: Corinnidae), Journal of Natural History 47 (23), pp. 1539-1567 : 1562-1565

publication ID	https://doi.org/ 10.1080/00222933.2012.763059
DOI	https://doi.org/10.5281/zenodo.5576096
persistent identifier	https://treatment.plazi.org/id/EC2A175A-FFA2-FF9F-AFCC-D375FBC59980
treatment provided by	Jeremy
scientific name	Jacaena angoonae
status	sp. nov.

Treatment

Jacaena angoonae View in CoL sp. nov.

( Figures 2 View Figure 2 D, 7 E, 8 E, 14 A–C)

Type material

Holotype: ♀, Thailand: Huay Nam Dang NP, joint border between Mae Taeng District of Chiang Mai Province and Pai District of Mae Hong Son Province, Doi Chang , evergreen hill forest, 1930 m, extraction of soil sample, 4 June 1983, P.J. Schwendinger leg. ( MHNG, PDC 4650 ) .

Paratypes: Same data as holotype, 3♀ ( NHML & THNM, PDC 4651 ) .

Diagnosis

Females of this new species bear very close resemblance to those of J. schwendingeri comb. nov. in having large, medially situated copulatory orifices, and similar shape of spermathecae. However, in J. angoonae sp. nov. the copulatory orifices are teardrop-shaped ( Figure 7 View Figure 7 E) and the insemination ducts are tubular without any modification ( Figure 8 View Figure 8 E) whereas in J. schwendingeri comb. nov. the orifices are subcircular ( Figure 7 View Figure 7 A) and the median part of the ducts is greatly enlarged ( Figure 8 View Figure 8 F).

Etymology

The specific epithet is an eponymous patronym (genitive form of a noun) dedicated to Dr Angoon Lewvanich, a prolific Thai taxonomist.

Description

Female (holotype). Total length 7.5. Carapace 3.0 long, 2.4 wide. Opisthosoma 4.5 long, 2.6 wide. Eye sizes and interdistances: AME 0.10; ALE 0.13; PME 0.08; PLE 0.11; AME–AME 0.06; AME–ALE 0.05; PME–PME 0.13; PME–PLE 0.16. MOQ 0.36 long; front width 0.28; back width 0.33. Leg formula 4123. Spination. Leg I: femur 1–1pl; tibia 8pl 8rl; metatarsus 4pl 4rl. Leg II: tibia 7pl 6rl; metatarsus 4pl 4rl. Leg III: tibia 1–1– 1v 1pl; metatarsus 1– 1v 1pl. Leg IV: tibia 1–1–1–1– 2v 1–1rl; metatarsus 1–1– 1v 1pl 1rl. Leg measurements: Leg I 8.6 (2.5, 1.0, 2.3, 1.85, 1.0); II 7.7 (2.2, 0.9, 1.9, 1.7, 1.0); III 6.1 (1.7, 0.8, 1.4, 0.85); IV 9.2 (2.5, 1.0, 2.1, 2.4, 1.2).

Colouration and pattern ( Figure 2 View Figure 2 D): Carapace dark chestnut-brown; integument coarsely granulated. Chelicerae, sternum, labium and gnathocoxae dark reddishbrown; coxae, trochanters and femora dark brown; patellae and tibiae brown, tibiae orange distally; metatarsi and tarsi I–II light brown, III–IV orange. Opisthosoma ovoid; dorsum with pattern consisting of paired, oblique patches, followed by three chevrons on dark grey background.

Copulatory organ ( Figures 7 View Figure 7 E, 8 E, 14 A–C): Copulatory orifices teardrop-shaped ( Figure 14 View Figure 14 A). Insemination ducts elongated, loosely coiled ( Figure 14 View Figure 14 B); proximal duct connected to copulatory orifice semi-transparent ( Figure 8 View Figure 8 E), forming sigmoid arch; secretory ampullae situated on posterior surface of proximal ducts; distal half of duct ascending anteriorly then descending posteriorly to connect with spermathecae. Spermathecae elliptical, anterior part distinctly enlarged, more or less spherical with glandular pore ( Figure 14 View Figure 14 B).

Male. Unknown.

Jacaena angoonae sp. nov. inhabits evergreen hill forest of Doi Chang (1930 m). This new species marks the highest altitudinal record among members of the genus Jacaena .

Distribution

Known only from the type locality, Mae Hongson Province, northern Thailand.