Otacilia horizon, Mu, Yannan & Zhang, Feng, 2023

Mu, Yannan & Zhang, Feng, 2023, Further additions to the guardstone spider fauna from China (Araneae: Phrurolithidae), Zootaxa 5338 (1), pp. 1-104 : 34-38

publication ID

https://doi.org/ 10.11646/zootaxa.5338.1.1

publication LSID

lsid:zoobank.org:pub:CAA37212-3008-43F4-98DE-94D7A3FFD3B6

DOI

https://doi.org/10.5281/zenodo.8283841

persistent identifier

https://treatment.plazi.org/id/364E87DE-8652-FFAC-5AA6-FB25DAC1215B

treatment provided by

Plazi

scientific name

Otacilia horizon
status

sp. nov.

Otacilia horizon View in CoL sp. nov. (MŴṚff)

Figs 25–27 View FIGURE 25 View FIGURE 26 View FIGURE 27

Type material. Holotype ♁, CHINA: Yunnan Province: Baoshan City, Longyang District, Lujiang Town (24.928124°N, 98.797474°E, 1927 m a.s.l.), 23 Nov. 2017, leg. Yannan Mu. GoogleMaps

Paratypes: 2 ♁ 5 ♀, with same data as holotype; 7 GoogleMaps 6 ♀, Taibaoshan Forest Park (25.118748°N, 99.149809°E, 1787 m a.s.l.), 21 Nov. 2017, leg. Yannan Mu GoogleMaps ; 2 ♁ 4 ♀, Taibaoshan Forest Park (25.116509°N, 99.153918°E, 1759 m a.s.l.), 20 Nov. 2017, leg. Yannan Mu GoogleMaps ; 1 ♁ 1 ♀, Longling County, Xiaoheishan Nature Reserve (24.556765°N, 98.821807°E, 1840 m a.s.l.), 28 Nov. 2017, leg. Yannan Mu. GoogleMaps

Etymology. This specific name is derived from the Latin word “ horizon ”, referring to the transverse embolus; noun in apposition.

Diagnosis. This new species resembles O. yangi Zhang, Fu & Zhu, 2009 in having a similar position and shape of the copulatory openings, but can be recognized by: 1) presence of a triangular apophysis prolaterally at the base of the retrolateral tibial apophysis (vs absent, cf. Fig. 26B View FIGURE 26 and fig. 4 in Zhang et al. [2009]), 2) the transverse embolus (vs upwards, cf. Fig. 26C View FIGURE 26 and fig. 3 in Zhang et al. [2009]), 3) the thicker copulatory ducts (vs thin, cf. Fig. 26E View FIGURE 26 and fig. 7 in Zhang et al. [2009]), and 4) the absence of glandular appendages (vs clavate-shaped, cf. Fig. 26F View FIGURE 26 and fig. 8 in Zhang et al. [2009]).

Description. Male (Holotype): total length 4.10, carapace 2.01 long, 1.78 wide; abdomen 2.09 long, 1.29 wide. Eye sizes and interdistances:AME 0.15, ALE 0.15, PME 0.12, PLE 0.15; AME–AME 0.05, AME–ALE 0.01, ALE– ALE 0.34, PME–PME 0.14, PME–PLE 0.08, PLE–PLE 0.54, ALE–PLE 0.10. EAW 0.72, CRW 0.93, EAW/CRW 0.77, CRW/CW 0.52. MOA 0.36 long, anterior width 0.32, posterior width 0.39. CH 0.16, CH /AME 1.07. Labium 0.21 long, 0.29 wide. Sternum 1.12 long, 0.98 wide. Leg measurements: Ⅰ 8.16 (2.01, 0.71, 2.45, 1.87, 1.12), II 7.18 (1.98, 0.76, 1.89, 1.53, 1.02), III 5.91 (1.63, 0.67, 1.35, 1.40, 0.89), IV 9.39 (2.64, 0.87, 2.22, 2.48, 1.18). Spination: femur I d 2 pl 4, femur II d 1 pl 2, femur IV d 1, tibia Ⅰ pv 8 rv 8, tibia II pv 7 rv 7, metatarsus Ⅰ pv 4 rv 4, metatarsus II pv 4 rv 3.

Coloration. Carapace yellow, with several shapes resembling flowing water droplets beside fovea. Abdomen gray, with yellow dorsal scutum and black pattern besides dorsal scutum anteriorly and three black transverse stripes posteriorly ( Fig. 25A, B View FIGURE 25 ). Legs yellow.

Palp as in Figs 26A–D View FIGURE 26 , 27A–C View FIGURE 27 . Femoral apophysis well-developed, located near middle of femur. Prolateral tibial apophysis distinct, semicircular. Retrolateral tibial apophysis base wide, digitiform tip, with small triangular apophysis prolaterally at base and large triangular apophysis retrolaterally at base. Tegulum pyriform; tegular apophysis absent. Sperm duct distinct, tapering from retrolateral side of tegulum to embolus. Embolus long, transverse, extending to retrolateral margin of cymbium. Conductor absent.

Female (Paratype): total length 5.58, carapace 2.21 long, 1.94 wide; abdomen 3.37 long, 2.08 wide. Eye sizes and interdistances: AME 0.15, ALE 0.16, PME 0.13, PLE 0.15; AME–AME 0.05, AME–ALE 0.01, ALE–ALE 0.35, PME–PME 0.14, PME–PLE 0.09, PLE–PLE 0.58, ALE–PLE 0. 11. EAW 0.76, CRW 1.03, EAW/CRW 0.74, CRW/CW 0.53. MOA 0.38 long, anterior width 0.34, posterior width 0.41. CH 0.14, CH /AME 0.93. Labium 0.18 long, 0.34 wide. Sternum 1.29 long, 1.15 wide. Leg measurements: Ⅰ 9.35 (2.50, 0.77, 2.81, 2.08, 1.19), II 7.53 (2.04, 0.74, 2.02, 1.66, 1.07), III 6.27 (1.63, 0.71, 1.38, 1.60, 0.95), IV 9.28 (2.64, 0.82, 2.23, 2.58, 1.01). Spination: femur I d 2 pl 5, femur II d 1 pl 2, femora III–IV d 1, tibia Ⅰ pv 9 rv 9, tibia II pv 8 rv 7, metatarsus Ⅰ pv 4 rv 4, metatarsus II pv 4 rv 3. Other characters as for male, except with three black chevron stripes and two transverse black stripes, and dorsal scutum absent ( Fig. 25C, D View FIGURE 25 ).

Epigyne as in Figs 26E–F View FIGURE 26 , 27D–E View FIGURE 27 . Epigynal plate sclerotized. Median septum V-shaped. Copulatory openings round, located at middle parts of plate, separated by about 3 times diameter of spermathecae. Copulatory ducts extremely thick, curved and connecting with bursa. Connecting tubes thinner than copulatory ducts, straight, close to each other. Bursa oval, transparent. Spermathecae oval, separated by less than their diameter. Fertilization ducts located on anterior margin of spermathecae.

Distribution. China (Yunnan Province).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Phrurolithidae

Genus

Otacilia

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