Episinus implicatus Liang, Liu, Yin & Xu, 2025, sp. nov.
Year: 2025
Type: other
Abstract: Episinus implicatus sp. nov. Materials Type status: Holotype. Occurrence: recordedBy: Jinxin Liu, Zongguang Huang, Yun Liang, Jinnan Liu and Yecheng Wu; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: E935EA98-5895-5F02-9626-ACC410D4A575; Taxon: scientificName: Episinus implicatus; Location: country: China; stateProvince: Yunnan; county: Mengla; verbatimLocality: Xishuangbanna Tropical Botanical Garden; verbatimElevation: 577 m; verbatimCoordinates: 21°55'0.67''N, 101°16'14.32''E; Event: year: 2023; month: 9; day: 30; Record Level: institutionID: HNU 869 Description Female (Holotype): Total length 5.01, carapace 1.79 long, 1.47 wide, abdomen 3.22 long, 2.67 wide. Eye sizes and inter-distances: AME 0.14, ALE 0.14, PME 0.12, PLE 0.12; AME-AME 0.09, AME-ALE 0.03, PME-PME 0.08, PME-PLE 0.08. Clypeus height 0.28. STL 1.05, STW 0.88. Legs measurements: I 8.78 (2.37, 0.81, 1.89, 2.80, 0.91); II 5.65 (1.66, 0.74, 1.08, 1.55 0.62); III 4.42 (1.29, 0.58, 0.79, 1.15, 0.61); IV 9.12 (2.64, 0.94, 1.84, 2.80, 0.91). Leg formula IV-I-II-III. Colouration (Fig. 3 A – C): Carapace pear-shaped, yellow-brown. Fovea and radial furrow brown, deep (Fig. 3 A). Eyes area slightly elevated. Chelicerae light brown, without teeth. Pedipalp brown. Endite longer than wide. Labium extending, nearly rectangular. Sternum longer than wide, lateral margins sinuous and brown (Fig. 3 B). Legs brown, except for pale trochanters III-IV, femur III and basal half of femur IV. Abdomen brown, dorsum with two white arcuate stripes anteriorly (Fig. 3 A), venter brown, except the pale posterolateral region and a slightly arched white line before spinnerets Fig. 3 B); pentagonal-shaped, with widest part at three quarters of abdominal length (Fig. 3 A) and with short hump on each side as seen in lateral view (Fig. 3 C). Epigyne (Fig. 3 D and Fig. 4 A): with deep and relatively large atria (A) separated by a sclerotised median septum. Vulva (Fig. 3 E – F and 4 B): copulatory ducts (CD) extremely long, coiling around spermathecae for approximately six loops and with two additional loops as seen in posterior view (Fig. 3 F). Spermathecae (S) longitudinally elongated, with contracted middle portions. Fertilisation ducts (FD) originating from inside side of basal spermathecae. Male. Unknown. Diagnosis This new species can be easily distinguished from those of all known Episinus species by extremely long copulatory ducts circling around spermathecae for approximately six loops (Fig. 3 E-F and Fig. 4 B). Etymology The specific epithet is derived from the Latin word “ implicatus ”, meaning “ coiled ” and referring to the shape of copulatory ducts (coiling around spermathecae for approximately six loops) and is an adjective, masculine. Distribution Known only from the type locality, China (Yunnan) (Fig. 9).
Authors: Liang, Yun, Liu, Jinnan, Yin, Haiqiang, Xu, Xiang
Institution: Hunan Normal University
Language: English
Subfield: Genetics
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W6949678109
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