Euryeidon dian Lu & Li, 2023
|
publication ID |
https://dx.doi.org/10.3897/zookeys.1175.107644 |
|
publication LSID |
lsid:zoobank.org:pub:9AB50C92-3182-4A64-A5EE-0973A81ED422 |
|
persistent identifier |
https://treatment.plazi.org/id/A1E6F861-99C9-5F3B-9AE3-6A2B80F88702 |
|
treatment provided by |
|
|
scientific name |
Euryeidon dian Lu & Li |
| status |
sp. nov. |
Euryeidon dian Lu & Li sp. nov.
Figs 1 View Figure 1 , 2 View Figure 2
Type material.
Holotype: 1♂ (IZCAS-Ar 44604), China, Yunnan, Xishuangbanna, Mengla County, Menglun Town, XTBG, Secondary tropical seasonal rain forest, 21°55.428′N, 101°16.441′E, 598 m, 16-31 June 2007, G. Zheng leg. Paratypes: 1♂ (IZCAS-Ar 44605), 2♀ (IZCAS-Ar 44606, Ar 44607), same data as holotype, but secondary tropical seasonal moist forest, 21°54.54′N, 101°17.202′E, 713 m, 1-15 July 2007.
Etymology.
The specific name refers to the type locality (Dian is a short name for Yunnan) and is a noun in apposition.
Diagnosis.
Euryeidon dian sp. nov. resembles E. sonthichaiae Dankittipakul & Jocqué, 2004 (cf. Figs 1 View Figure 1 , 2 View Figure 2 and Dankittipakul and Jocqué 2004: 763, figs 35-37) in that the males have a similar tegular apophysis (Fig. 2A, B View Figure 2 ). Males can be distinguished by the anterior part of the retrolateral tibial apophysis semi-transparent, and nearly round in ventral view (Fig. 2B, C View Figure 2 ; vs. retrolateral tibial apophysis strongly sclerotized, bifurcated, with sharply pointed apex), by the dorsal tibial apophysis bifurcated, with two curved and pointed apophyses (Fig. 2B, C View Figure 2 ; vs. dorsal tibial apophysis absent), by the longer filiform embolus (Fig. 2A, C View Figure 2 ; vs. embolus shorter), by the conductor being hook-shaped apically (Fig. 2A View Figure 2 ; vs. prolateral side of conductor greatly excavated to accommodate the embolic tip). Females can be easily distinguished from all known congeners by the bud-shaped copulatory openings (Fig. 1E View Figure 1 ), by the single-lobed spermathecae lying beneath the copulatory ducts (Fig. 1E View Figure 1 ), and by the copulatory ducts large, wing-shaped, and occupying the entire vulva (Fig. 1F View Figure 1 ).
Description.
Male (holotype; Fig. 1A, B View Figure 1 ). Total length 4.33; prosoma 2.05 long, 1.34 wide; opisthosoma 2.28 long, 1.07 wide. Eye sizes and interdistances: AME 0.04, ALE 0.08, PME 0.08, PLE 0.08, AME-AME 0.03, AME-ALE 0.12, PME-PME 0.05, PME-PLE 0.15; MOQ: 0.19 long, 0.11 anterior width, 0.19 posterior width. Leg measurements: I * (1.28, 0.55, 1.10, 0.89, *), II 4.02 (1.16, 0.55, 0.87, 0.72, 0.72), III 3.87 (1.06, 0.53, 0.72, 0.90, 0.66), IV * (1.28, 0.55, 1.06, 1.32, *). Spination: femora IV d100; tibiae I v122, II r11, v112, III p11, d010, r11, v222, IV p201, d110, r211, v222; metatarsi I p010, v222, II r010, v222, III p122, r122, v222, IV p112, d010, r112, v2222.
Pattern and colouration (Fig. 1A, B View Figure 1 ). Carapace elongate oval, in profile flat, light brown, with distinct dark fovea, covered with pits. Chelicerae brown. Labium triangular, yellowish, apically with narrow membranous area and anteromedian scopula, basal and lateral margins slightly darker. Endites light brown, nearly triangular. Sternum light brown, shield-shaped, precoxal triangles and intercoxal sclerites present, anterior margin straight, with two small indentations at level of labium corner, posterior margin protruding. Legs yellowish, but brown on tarsus. Opisthosoma elongate oval. Dorsum of opisthosoma yellowish, with narrow band covering half of abdominal length. Venter yellowish. Spinnerets yellowish.
Palp (Fig. 2A-C View Figure 2 ). Tibia with weakly sclerotized retrolateral tibial apophysis, anterior part semi-transparent, nearly round in ventral view; dorsal tibial apophysis strongly sclerotized, bifurcated, with two apophyses curved and sharply pointed. Cymbium with sclerotized prolateral extension and baso-retrolateral flange; cymbial fold approximately total length of cymbium. Tegular apophysis strip-shaped in ventral view, hooked in retrolateral view, sclerotized, situated on membranous base. Conductor sclerotized apically, hook-shaped, with small sub-apical tooth, posterior part membranous. Embolic base oval, originating posteriorly at 180°, attached to tegulum with membranous area anteriorly. Embolus filiform, long, curved and tapered apically.
Female (paratype; Fig. 1C, D View Figure 1 ). Total length 5.44; prosoma 1.92 long, 1.26 wide; opisthosoma 3.52 long, 1.86 wide. Eye sizes and interdistances: AME 0.03, ALE 0.07, PME 0.07, PLE 0.08, AME-AME 0.02, AME-ALE 0.13, PME-PME 0.05, PME-PLE 0.16; MOQ: 0.19 long, 0.07 anterior width, 0.17 posterior width. Leg measurements: I 3.98 (1.15, 0.54, 0.93, 0.70, 0.66), II 3.59 (1.00, 0.51, 0.75, 0.69, 0.64), III 3.36 (0.92, 0.49, 0.59, 0.80, 0.56), IV 4.75 (1.21, 0.52, 1.01, 1.15, 0.86). Spination: femora I-III d100, IV d11; patellae III-IV 101; tibiae I v122, II v11, III p11, d010, r11, v222, IV p11, d010, r111, v222; metatarsi I-II v222, III p112, r022, v222, IV p112, r112, v222.
Pattern and colouration (Fig. 1C, D View Figure 1 ). Colour and somatic morphology as in male, except as noted. Dorsum of opisthosoma pale, without dorsal scutum and with light brown band centrally. Venter pale. Spinnerets pale.
Genitalia (Fig. 1E, F View Figure 1 ). Epigynal plate fan-shaped and sclerotized. Copulatory openings bud-shaped, situated in the middle of epigynal plate. Vulva with round spermathecae, single lobed beneath the copulatory ducts, widely separate from each other, and with pair of fertilization ducts posteriorly, originating underneath the spermathecae. Copulatory ducts large, wing-shaped, occupying entire vulva.
Natural history.
The species was found in leaf litter.
Variation.
Male: total body length 4.14. Female: total body length 4.86.
Distribution.
China (Yunnan, type locality).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.