Jacaena peculiaris Dankittipakul, Tavano &amp; Singtripop, 2013, sp. nov.
Creators: name: Dankittipakul, Pakawin
name: Tavano, Maria
name: Singtripop, Tippawan
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Liocranidae
Jacaena
Jacaena peculiaris

description: <i>Jacaena peculiaris</i> sp. nov. (Figures 2 H, 6 D, 7 F, 14 D – E) <i>Type material</i> Holotype: &amp;female;, Thailand: Nan Province: Tha Wang Pha District, Nanthaburi NP, Doi Wao, evergreen hill forest near the summit, 1300–1550 m, extraction of leaf litter samples, 7 December 2005, P. Dankittipakul leg. (MHNG, PDC 4640). Paratypes: Same data as holotype, 2&amp;female; (THNM, PDC 4654). <i>Diagnosis</i> Unlike most females of <i>Jacaena</i>, <i>J. peculiaris</i> sp. nov. can be readily distinguished by the very enlarged spermathecae (Figures 7 F, 14 E), a character that is shared among the females of <i>Teutamus</i> species. However, females of <i>Jacaena</i> can be separated from those of <i>Teutamus</i> in the lack of the dorsal scutum and their epigastric scutum is not protruding and forming an elongated collar; the spination of legs and other somatic characters are also different from <i>Teutamus</i>. <i>Etymology</i> The specific epithet refers to the peculiar shape of the spermathecae, which are the largest among <i>Jacaena</i> females (Latin, <i>pecularis</i> = belonging exclusively to one person). <i>Description</i> <i>Female</i> (holotype). Total length 6.1. Carapace 2.8 long, 2.2 wide. Opisthosoma 3.3 long, 1.7 wide. Eye sizes and interdistances: AME 0.13; ALE 0.13; PME 0.11; PLE 0.15; AME – AME 0.08; AME –ALE 0.05; PME–PME 0.11; PME–PLE 0.15. MOQ 0.33 long; front width 0.31; back width 0.33. Leg formula 4123. Spination. Leg I: femur 1–1pl; tibia 8pl 7rl; metatarsus 5pl 5rl. Leg II: tibia 7pl 6rl; metatarsus 4pl 4rl. Leg III: tibia 1–1– 1v 1pl 1rl; metatarsus 1– 1v 1rl. Leg IV: tibia 1–1–1–1– 2v 1–1rl; metatarsus 1–1–1–1– 1v 1pl 1rl. Leg measurements: Leg I 7.5 (2.2, 0.8, 2.0, 1.6, 0.9); II 6.8 (2.0, 0.9, 1.5, 1.5, 0.9); III 5.6 (1.6, 0.7, 1.2, 1.3, 2.8); IV 8.8 (2.3, 0.9, 2.0, 2.5, 1.1). Colouration and pattern (Figure 2 H): Carapace dark reddish-brown; integument finely granulated. Fovea obsolete. Chelicerae, sternum, labium and gnathocoxae dark reddish-brown. Legs I–II dark brown, femora darkest, tibiae yellow distally; legs III–IV orange-brown, femora brown. Opisthosoma elongate-ovoid; dorsum grey, with paired, enlarged pale patches, followed by broad pale band and pale area above spinnerets. Copulatory organ (Figures 6 D, 7 F, 14 D – E): Copulatory orifices (Figure 14 D) circular, anterior margin poorly defined, posterior margin represented by elevated ridge, connected to bell-shaped, semi-transparent chamber (Figure 6 D). Insemination ducts tubular, elongated, slender, opening to mesolateral surface of enlarged spermathecae (Figure 14 E). Spermathecae more or less reniform, with large glandular pore situated anteriorly (Figures 6 D, 14 E). Secretory ampullae attached to apex of semi-transparent chamber (Figure 6 D). <i>Male</i>. Unknown. <i>Natural history</i> Types of <i>J. peculiaris</i> sp. nov. were collected from evergreen hill forests near the summit of Doi Wao where the humidity is constantly high (<i>&gt;</i> 85% relatively humidity), even during summer. <i>Distribution</i> Known only from the type locality, Nan Province, northern Thailand.
description: Published as part of <i>Dankittipakul, Pakawin, Tavano, Maria &amp; Singtripop, Tippawan, 2013, Revision of the spider genus Jacaena Thorell, 1897, with descriptions of four new species from Thailand (Araneae: Corinnidae), pp. 1539-1567 in Journal of Natural History 47 (23)</i> on pages 1565-1566, DOI: 10.1080/00222933.2012.763059, http://zenodo.org/record/556127