Systaria acuminata , Dankittipakul, Pakawin & Singtripop, Tippawan, 2011

Dankittipakul, Pakawin & Singtripop, Tippawan, 2011, Seven new species of Systaria Simon, 1897 from Southeast Asia (Araneae, Clubionidae, Systariinae), Zootaxa 2905, pp. 16-32: 28-29

publication ID

10.5281/zenodo.207104

persistent identifier

http://treatment.plazi.org/id/038287A8-FFFB-FFE9-DCAD-FC86B566FE28

treatment provided by

Plazi

scientific name

Systaria acuminata
status

sp. nov.

Systaria acuminata  sp. nov.

Figs 32–37View FIGURES 32 – 37

Type material. Holotype: 3, THAILAND: Krabi Province: Aao Luk District, outside Waree-Rin Cave, 60 m, oil palm plantation, 13 September 2006, leg. P.J. Schwendinger ( MHNGAbout MHNG, Sys- 13).

Paratypes: 13, same data as holotype, ( TNHMAbout TNHM). INDONESIA: Mapur Island: 23, disturbed rainforest ca. 5 km northwest of Mapur Niang, 10-50 m, 21 June 2001, leg. P.J. Schwendinger ( MHNGAbout MHNG, SIM- 01/05, Sys- 14). Sumatra: 1 Ƥ, Jambi Province: Mt. Tujuh, footpath to Lake Mt. Tujuh, 1,500-2,000 m, evergreen hill forest, 20 February 2000, leg. P.J. Schwendinger ( MHNGAbout MHNG, Sys- 17).

Diagnosis. Males of S. acuminata  sp. nov. can be recognized by the shape of RTA, and by the abruptly bent apex of embolus. Females closely resemble those of S. dentata  sp. nov. and S. cervina  in the shape of their internal genitalia but can be distinguished by the more elongate anterior bursae.

Etymology. The specific epithet is a Latin adjective (acuminatus, -a, -um), referring to a gradually tapering embolus on the male palp.

Description. Male (holotype): Total length 8.80. Prosoma 3.68 long, 2.56 wide. Opisthosoma 4.40 long, 2.20 wide. Leg formula: 4123; I 11.88 (3.04, 1.68, 2.96, 2.68, 1.52); II 10.18 (2.88, 1.46, 2.70, 1.96, 1.18); III 8.78 (2.38, 0.98, 1.98, 2.46, 0.98); IV 12.70 (3.52, 1.24, 3.28, 3.38, 1.28). Spination. Femora I d 1 - 1 - 1, p 1 - 1 - 1, r 0-1 - 1; II d 1 - 1 - 1, p 1 - 1 - 1, r 0-1 - 1; III d 1 - 1 - 1, p 1 - 1 -0, r 1 - 1 - 1; IV d 1 - 1 - 1, p 0-1 - 1, r 1 - 1 - 1. Tibiae: I v 2 - 2 - 2; II v 2 - 2 - 2; III d 0-1 - 1, p 1 - 1 -0, r 2 - 2 - 2, v 2 - 2 - 2; IV d 0-1 -0, p 1 - 1 -0, r 1 - 1 -0, v 2 - 2 - 2. Metatarsi: I v 1 -0-0; II v 1 - 1 - 1; III p 1 - 1-2, r 1 - 1-2, v 1 - 0-1; IV p 1 - 1 - 1, r 2 - 2 - 2, v 1 - 1 - 1. Eye size and interdistances: AME 0.14, ALE 0.10, PME 0.08, PLE 0.08; AME–AME 0.18, AME–ALE 0.16, PME–PME 0.24, PME–PLE 0.16, ALE–PLE 0.12; MOA 0.30 long, anterior width 0.30, posterior width 0.28.

Palp ( Figs 32–34View FIGURES 32 – 37). Ventral surface of tibia protruding retrolaterally ( Figs 32, 34View FIGURES 32 – 37). RTA provided with sharply pointed ventral process and flange-like dorsal one. Cymbial fold partially membranous. Cymbial tubercle sharply pointed. Embolus rostrated; embolic base membranous; apex of embolus elongated, abruptly bent subapically. Conductor spoon-shaped, with broad basal flange.

Variation. The dorsal process on the RTA of the male palp is dorsally notched in a male paratype collected from Sumatra ( Fig. 35View FIGURES 32 – 37).

Female (paratype, MHNGAbout MHNG, Sys- 17): Total length 10.44. Prosoma 4.78 long, 3.44 wide. Opisthosoma 5.66 long, 3.08 wide. Leg formula: 4123; I 9.26 (2.68, 1.40 2.58, 1.66, 0.94); II 8.70 (2.64, 1.28, 2.26, 1.64, 0.88); III 8.38 (2.90, 0.88, 1.78, 1.94, 0.88); IV 12.58 (3.56, 1.34, 2.82, 3.28, 1.58). Spination. Femora: I d 1 - 1 - 1, p 1 - 1 -0, r 1 - 1 -0; II d 1 - 1 - 1, p 0-1 - 1, r 1 - 1 - 1; III d 1 - 1 - 1, p 1 - 0-1, r 1 - 1 - 1; IV d 1 - 1 - 1, p 1 - 1 - 1, r 1 -0-0. Tibiae: I v 2 - 2 -0; II v 1 - 1 -0; III p 1 - 1 -0, r 1 - 0-1, v 2 - 2 - 2; IV p 1 - 1 -0, r 1 - 1 -0, v 2 - 2 - 2. Metatarsi: II v 1 - 1 -0; III p 1 - 1 - 1, r 1 - 1-2, v 2 - 0-2; IV p 1 - 1-2, r 1 - 1-2, v 2 - 2 - 2.

Eye size and interdistances: AME 0.14, ALE 0.12, PME 0.10, PLE 0.10; AME–AME 0.16, AME–ALE 0.14, PME–PME 0.22, PME–PLE 0.16, ALE–PLE 0.14; MOA 0.26 long, anterior width 0.36, posterior width 0.34.

Genitalia ( Figs 36–37View FIGURES 32 – 37). Epigynal atrium deep, situated posteriorly. Copulatory orifices oval, situated on anterior margin of epigynal atrium. Anterior bursae sclerotized, elongated, widest posteriorly, distinctly narrowed anteriorly. Spermathecae enlarged, more or less spherical. Fertilization ducts acuminated.

Natural history. Types of S. acuminata  sp. nov. were collected from plantation and forests not far from the coast.

Distribution. Southern Thailand and Indonesia (Fig. 43).

MHNG

Museum d'Histoire Naturelle

TNHM

University of Texas

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Miturgidae

Genus

Systaria