Otacilia baimashan Shi, Wang & Mu, 2025

Shi, Zijian, Wang, Luyu, Shu, Ziyun, Wang, Hua & Mu, Yannan, 2025, Two new species of Otacilia Thorell, 1897 (Phrurolithidae) from Baima Mountain Nature Reserve, Chongqing, China, Biodiversity Data Journal 13, pp. e 176953-e 176953 : e176953-

Otacilia baimashan Shi, Wang & Mu sp. nov.

Materials

Type status: Holotype. Occurrence: individualCount: 1; sex: male; lifeStage: adult; occurrenceID: D413F489-A16C-52ED-814D-6D01EDA0CFDE; Taxon: scientificName: Otacilia baimashan Shi, Wang & Mu , sp. nov.; order: Araneae ; family: Phrurolithidae ; genus: Otacilia ; Location: country: China; municipality: Chongqing; locality: Baima Mountain Nature Reserve, Baima Town, Hongmiao ; verbatimElevation: 1478; verbatimLatitude: 29°14′58″N; verbatimLongitude: 107°33′47″E; Event: year: 2025; month: 9; day: 16; habitat: leaf litter; Record Level: institutionID: the Collection of Spiders, Southwest University; institutionCode: SWUC

Type status: Paratype. Occurrence: individualCount: 40; sex: 22 male, 18 female; lifeStage: adult; occurrenceID: 1149A4D8-354F-556B-A7C3-9C827E289867; Taxon: scientificName: Otacilia baimashan Shi, Wang & Mu , sp. nov.; order: Araneae ; family: Phrurolithidae ; genus: Otacilia ; Location: country: China; municipality: Chongqing; locality: Baima Mountain Nature Reserve, Baima Town, Hongmiao ; verbatimElevation: 1478; verbatimLatitude: 29°14′58″N; verbatimLongitude: 107°33′47″E; Event: year: 2025; month: 9; day: 16; habitat: leaf litter; Record Level: institutionID: the Collection of Spiders, Southwest University; institutionCode: SWUC

Type status: Paratype. Occurrence: individualCount: 8; sex: 6 male, 2 female; lifeStage: adult; occurrenceID: 575C960C-1ED7-5BC7-9676-164EC3331F2F; Taxon: scientificName: Otacilia baimashan Shi, Wang & Mu , sp. nov.; order: Araneae ; family: Phrurolithidae ; genus: Otacilia ; Location: country: China; municipality: Chongqing; locality: Baima Mountain Nature Reserve, Baima Mountain ; verbatimElevation: 1478; verbatimLatitude: 29°14′37″N; verbatimLongitude: 107°33′52″E; Event: year: 2025; month: 9; day: 16; habitat: leaf litter; Record Level: institutionID: the Collection of Spiders, Southwest University; institutionCode: SWUC

Type status: Paratype. Occurrence: individualCount: 1; sex: female; lifeStage: adult; occurrenceID: D7315F8A-1580-5016-9C2D-E2E9F1733863; Taxon: scientificName: Otacilia baimashan Shi, Wang & Mu , sp. nov.; order: Araneae ; family: Phrurolithidae ; genus: Otacilia ; Location: country: China; municipality: Chongqing; locality: Baima Mountain Nature Reserve, Waiba Yakou ; verbatimElevation: 1478; verbatimLatitude: 29°14′37″N; verbatimLongitude: 107°33′52″E; Event: year: 2025; month: 9; day: 16; habitat: leaf litter; Record Level: institutionID: the Collection of Spiders, Southwest University; institutionCode: SWUC

Description

Male ( holotype) total length 2.83 (Fig. 1 A and Fig. 4 A): carapace 1.50 long, 1.28 wide; opisthosoma 1.29 long, 1.02 wide. Eye sizes and interdistances: AME 0.08, ALE 0.11, PME 0.06, PLE 0.09; AME – AME 0.03, AME – ALE 0.01, PME – PME 0.08, PME – PLE 0.08, ALE – PLE 0.07. MOA 0.21 long, anterior width 0.18, posterior width 0.20. Clypeal height 0.11, CH / AME 1.38. Leg measurements: I 4.88 (1.26, 1.82, 1.17, 0.63); II 4.17 (1.19, 1.42, 0.96, 0.60); III 3.80 (1.01, 1.19, 1.00, 0.60); IV 5.38 (1.38, 1.66, 1.48, 0.86). Leg formula: 4123. Leg spination: femur I d 2 pl 3, femur II d 1 pl 1, femora III – IV d 1; tibia I v 6, tibia II pv 6 rv 5; metatarsus I – II pv 4 rv 3.

Colouration and pattern (Fig. 1 A). Carapace yellow, smooth; fovea short, longitudinal; cervical and radial grooves indistinct. Legs yellow, without annulations. Abdomen dorsally yellow, with a small anterior dorsal scutum flanked by two triangular black patches; posterior part with seven transverse, arcuate black bands.

Palp (Fig. 2 A – D). Femoral apophysis distinct, located at middle part of femur (Fig. 2 A and C). RTA base broad, with a ventral tubercle in ventral view (Fig. 2 B); distally with a small lamellar branch on prolateral side (Fig. 2 C and D), retrolateral branch claw-like and curved towards cymbium (Fig. 2 B and D). Dorsal tibial apophysis tapering from base to tip, with tip curving prolaterally in dorsal view (Fig. 2 D). Tegular apophysis laminar, arc-shaped (Fig. 2 B and C). Sperm duct U – shaped, tapering from retrolateral of tegelum to embolus. Embolus thick at base, curving at 90 ° at middle part and tapering to tip in ventral view (Fig. 2 B). Conductor membranous, translucent (Fig. 2 B).

Female ( paratype): total length 3.20 (Fig. 1 B and Fig. 4 B): carapace 1.57 long, 1.34 wide; abdomen 1.72 long, 1.23 wide. Eye sizes and interdistances: AME 0.09, ALE 0.12, PME 0.06, PLE 0.09; AME – AME 0.03, AME – ALE 0.01, PME – PME 0.08, PME – PLE 0.09, ALE – PLE 0.07. MOA 0.22 long, anterior width 0.19, posterior width 0.20. Clypeus height 0.10, CH / AME 1.11. Leg measurements: Ⅰ 5.08 (1.31, 1.94, 1.27, 0.56), Ⅱ 4.50 (1.24, 1.56, 1.07, 0.63), Ⅲ 3.97 (1.09, 1.16, 1.03, 0.69), Ⅳ 5.77 (1.50, 1.76, 1.56, 0.95). Leg formula: 4123. Leg spination: femur I d 2 pl 3, femur II d 1 pl 2, femora III – IV d 1; tibia I v 6 pairs, tibia II pv 6 rv 5; metatarsus I – II pv 4 rv 3.

Colouration and pattern (Fig. 1 B). Carapace yellow, smooth, fovea longitudinal, cervical and radial grooves indistinct; with several markings resembling flowing water droplets beside fovea. Other abdomen characters as in male, except without a dorsal scutum.

Epigyne (Fig. 2 E and F). Epigynal plate weakly sclerotised. Median septum wide at base. Copulatory openings situated at posterior margin of atrium. Copulatory ducts thick, short; connecting tubes shorter than copulatory ducts. Glandular appendages absent. Bursae balloon – shaped, somewhat translucent. Spermathecae oval, widely separated. Fertilisation ducts located at posterior of spermathecae.

Diagnosis

This new species resembles Otacilia hamata (Wang, F. Zhang & Z. S. Zhang, 2012) ( Wang et al. 2012) in having similar short embolus, membranous conductor and the absence of glandular appendages, but can be recognised by: 1) RTA broad (vs. relatively narrow in O. hamata ); 2) median septum wide (vs. thin in O. hamata ); 3) spermathecae oval, separated by about three times their diameter (vs. nearly spherical, separated by their diameter in O. hamata ).

Etymology

The specific name is derived from the type locality; noun in apposition.

Distribution

Known only from the type locality, China ( Chongqing).

Figures

Figure 1. Habitus of Otacilia baimashan Shi, Wang & Mu, sp. nov.: A Male habitus, dorsal view; B Female habitus, dorsal view. Habitus of Otacilia wulong Shi, Wang & Mu, sp. nov.: C Male habitus, dorsal view; D Female habitus, dorsal view.

Figure 2. Copulatory organs of Otacilia baimashan Shi, Wang & Mu, sp. nov.: A Male left male palp, prolateral view; B Same, ventral view; C Same, retrolateral view; D Same, dorsal view; E Epigyne, ventral view; F Vulva, dorsal view.

Figure 4. Living photos of Otacilia baimashan Shi, Wang & Mu, sp. nov.: A Male; B Female. Living photos of Otacilia wulong Shi, Wang & Mu, sp. nov.: C Male; D Female. (photographs by Qianle Lu).