Patu nagarat S. Li & Lin, 2021

Li, Ya, Li, Shuqiang & Lin, Yucheng, 2021, Taxonomic study on fourteen symphytognathid species from Asia (Araneae, Symphytognathidae), ZooKeys 1072, pp. 1-47 : 1

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Patu nagarat S. Li & Lin

sp. nov.

Patu nagarat S. Li & Lin sp. nov.

Figures 8 View Figure 8 , 9 View Figure 9 , 23 View Figure 23

Type material.

Holotype ♂ (IZCAS-Ar 41039) and paratypes 5♀ (IZCAS-Ar 41040~41044) Thailand: Khon Kaen Province, Chum Phae District, Nanoog Toom Subdistrict, Nagarat Cave (16.81402°N, 101.95663°E; 531 m alt.), 30.IX.2016, H. Zhao et al. leg.; 1♂ 3♀ (NHMSU-HA087), same data as holotype; 1♂ (NHMSU-HA087) and 1♀ (NHMSU-HA087) used for sequencing, GenBank: MW970240 and MW970239, same data as for preceding.


The specific epithet derives from the type locality; noun in apposition.


The male of P. nagarat sp. nov. can be distinguished from that of other congeners by having a bifurcate, sclerotised median apophysis and a pyramidal tegular process and lacking a conductor (Fig. 9A View Figure 9 and B View Figure 9 ) vs. lacking a median apophysis (or if present, it is not furcate) and/or having a conductor (Figs 1D View Figure 1 , 4D View Figure 4 , 7A View Figure 7 and 14A View Figure 14 ). The female is similar to that of P. jidanweishi in the configuration of the vulva, but it differs by having a triangular parmula and the spermathecae are closer together, rather than a finger-like scape and more widely separated spermathecae (cf. Figs 9C-F View Figure 9 and 7C-F View Figure 7 ).


Male (IZCAS-Ar 41039). Total length 0.60. Carapace 0.24 long, 0.28 wide, 0.32 high. Clypeus 0.14 high. Sternum 0.20 long, 0.20 wide. Abdomen 0.44 long, 0.44 wide, 0.48 high. Length of legs: I 1.06 (0.32, 0.12, 0.22, 0.16, 0.24); II 0.92 (0.26, 0.12, 0.18, 0.14, 0.22); III 0.70 (0.22, 0.10, 0.12, 0.12, 0.14); IV 0.80 (0.26, 0.10, 0.16, 0.12, 0.16).

Somatic characters (Fig. 8A-C View Figure 8 ). Colouration: body pale yellow, opisthosoma darker than prosoma, slightly grey on abdominal ventre and posterior. Leg colour a gradient, pale from femora and patella, darkening distally to dark greyish. Prosoma: carapace wider than long, dorsally oval. Eyes subequal in size. ALE protruded, PER straight, PME separated by ~ ⅓ their diameter. Cephalic part with 2 setae apically, vertical anteriorly, sloped posteriorly. Chelicerae anterior surface flat. Labium semi-circular. Sternum slightly plump, smooth, with a few setae. Legs: patella with 1 long disto-dorsal seta, tibia with 1 proximal and 1 mesal long dorsal seta. Tibia II with 2 ventral clasping spines subdistally, 1 thick and 1 thin (Fig. 8C View Figure 8 ). Opisthosoma: globular cuticle with sparse, long, black setae. Spinnerets grey.

Palp (Fig. 9A View Figure 9 and B View Figure 9 ): relatively large, ~ ½ of carapace size. Femur swollen, nearly as wide as long. Patella short, narrower than femur. Tibia flat and lamellar, length equal to ~ 2 × patella. Cymbium wrapping around bulb prolaterally and ventrally, its distal extension forming triangular lamina, with 2 long setae distally. Tegulum broad, rugose, with pyramidal process. Median apophysis strongly sclerotised, bifurcate distally. Sperm duct thin, faintly visible. Embolus long, slender, with a circuitous course in basal haematodocha and tegulum. Embolus filiform, protrudes from under cymbial extension, snaking to apex of tegulum.

Female (IZCAS-Ar 41040). Total length 0.64. Carapace 0.32 long, 0.28 wide, 0.28 high. Clypeus 0.10 high. Sternum 0.20 long, 0.20 wide. Abdomen 0.44 long, 0.44 wide, 0.44 high. Length of legs: I 0.90 (0.28, 0.12, 0.18, 0.14, 0.18); II 0.86 (0.26, 0.12, 0.16, 0.12, 0.20); III 0.66 (0.18, 0.10, 0.10, 0.10, 0.18); IV 0.82 (0.28, 0.12, 0.14, 0.10, 0.18).

Somatic characters (Fig. 8D-F View Figure 8 ). Colouration: same as in male. Prosoma: carapace ovate dorsally. Ocular area slightly more anterior than in male. Cephalic part slightly lower than in male. Legs: colour of tibia, metatarsi and tarsi darker than in male. Opisthosoma: same as in male.

Epigyne (Fig. 9C-F View Figure 9 ): weakly sclerotised, with a few setae medially, internal structures of vulva faintly visible via the cuticle. Parmula large, triangular, protruded ventrally. Copulatory openings located on the bilateral corners of parmula base. Spermathecae oval, distally tilted slightly downwards. Copulatory ducts mostly membranous and rugose. Proximal portion of copulatory ducts weakly sclerotised, originating at ventrolateral corners of parmula base, distal portion connected to the posterolateral margin of spermathecae. Fertilisation ducts short, starting at the anterolateral margin of spermathecae.


Thailand (Fig. 23 View Figure 23 ).