Zamilia shwayi Jiang & Li, 2022

Xin, Yafei, Jiang, Tongyao, Yao, Zhiyuan & Li, Shuqiang, 2022, Twenty new spider species (Arachnida: Araneae) from Late Cretaceous Kachin amber (Myanmar), Zoological Systematics 47 (1), pp. 1-65 : 12

Zamilia shwayi Jiang & Li , sp. nov. ( Figs 10–12 )

Holotype. Male (IZCAS-Ar42686Fo). Late Cretaceous amber from Hukawng Valley. No biotic syninclusions.

Etymology. The species name is a popular Burmese boy’s name and means “gold”; noun in apposition.

Diagnosis. Zamilia shwayi Jiang & Li , sp. nov. resembles Z. quattuormammillae Wunderlich, 2015 (see Wunderlich, 2015: 296, figs 300–309, photo 147) by the general shape of the median apophysis but can be distinguished from the latter by the lack of another tegular apophysis in addition to the embolus and conductor.

Description. Male. Total length 2.21; carapace 0.87 long, 0.79 wide; opisthosoma 1.34 long, 0.67 wide. Left palp: - (0.37 + - + 0.22), left leg I: - (0.88 + - + - + 0.70 + 0.36), leg II: - (0.93 + - + - + 0.68 + 0.38), leg III: - (0.92 + - + - + 0.67 + 0.34), leg IV: 2.89 (0.99 + 0.20 + 0.53 + 0.80 + 0.37); right palp: - (0.33 + - + 0.24), right leg I: - (- + - + - + 0.75 + 0.36), leg II: 2.68 (0.78 + 0.22 + 0.60 + 0.73 + 0.35), leg III: 2.53 (0.72 + 0.19 + 0.50 + 0.77 + 0.35), leg IV: 2.89 (0.91 + 0.23 + 0.54 + 0.81 + 0.40). Eye sizes and interdistances: ALE 0.04, AME 0.06, PLE 0.04, PME 0.06; AME–AME 0.05, AME–ALE 0.03, PME–PLE 0.01, PME–PME 0.07. Habitus as in Figs 11A–B . Carapace almost round, brown, short, with black-brown setae. Sternum yellowish and round, with dense brown setae. Labium not visible. Legs have two spines distally on metatarsus and tarsus, three claws. Opisthosoma elongate, black-brown. Spinnerets not visible; anal tubercle fringed with long setae.

Palp ( Figs 10A–D , 12 ). Ratio of femur length to cymbial length 1.23, femur width 0.10, cymbium oval, longer than wide; embolus sclerotized. Conductor membranous, with a tip that looks like a rhomboid ribbon distally. Median apophysis near base of conductor, slightly flattened, with crimping distally.

Figures

Figure 10. Zamilia shwayi Jiang & Li, sp. nov., holotype male (IZCAS-Ar42686Fo).A–B. Left palp (A. Ventral view; B. Dorsal view); C–D. Right palp (C. Retrolateral view; D. Prolateral view). Scale bars=0.10mm.

Figure 11. Zamilia shwayi Jiang & Li, sp. nov., holotype male (IZCAS-Ar42686Fo).A–B. Habitus (A. Dorsal view; B. Ventral view); C. Ocular area, dorsal view; D. Tarsus and claw, lateral view. Scale bars:A–B=0.50mm; C–D=0.05mm.

Figure 12. Zamilia shwayi Jiang & Li, sp. nov., holotype male (IZCAS-Ar42686Fo), right palp, retrolateral view. Scale bar=0.10mm.