Zamilia sheini 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 : 3-12

Zamilia sheini Jiang & Li , sp. nov. ( Figs 7–9 )

Holotype. Male (IZCAS-Ar42685Fo). Late Cretaceous amber from Hukawng Valley. Syninclusions include one mite and two dipterans.

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

Diagnosis. Zamilia sheini Jiang & Li , sp. nov. can be distinguished from its congeners by a flake-shaped median apophysis and a membranous conductor. It can be distinguished from Z. quattuormammillae Wunderlich, 2015 (see Wunderlich, 2015: 296, figs 300–309, photo 147) by the triangular median apophysis and the smooth clypeal margin, while Z. quattuormammillae has a nose-shaped apophysis on the clypeus and a curved median apophysis.

Description. Male. Total length 1.97; carapace 0.74 long, 0.91 wide; opisthosoma 1.23 long, 1.01 wide. Left palp: - (- + 0.21 + -), left leg I: - (- + - + - + 0.89 + 0.45), leg II: - (- + - + - + 0.84 + 0.40), leg III: - (- + - + - + 0.76 + 0.40), leg IV: - (- + - + - + 0.83 + 0.47); right palp: - (0.67 + - + -), right leg I: - (- + - + - + 0.83 + 0.36), leg II: - (0.79 + - + - + 0.81 +0.40), leg III: - (0.81 + - + - + 0.77 + 0.38), leg IV: - (- + - + - + 0.75 + 0.44). Eye sizes and interdistances: ALE 0.05, AME 0.07, PLE 0.07, PME 0.06; AME–AME 0.04, AME–ALE 0.02, ALE–PLE 0.05, PME–PLE 0.01, PME–PME 0.05. Habitus as in Figs 8A–B . Carapace almost round, yellowish. Sternum round, yellowish with dense brown setae. Legs have two spines distally on metatarsus and tarsus, 3 claws. Opisthosoma round. Anterior lateral spinnerets ( Fig. 8D ) short, posterior spinnerets with terminal segment long, ca. 0.26, basal segment short, ca. 0.06; anal tubercle fringed with long setae.

Palp ( Figs 7A–D , 9 ). Ratio of femur length to cymbial length 2.57, femur width 0.09, cymbium round, length equal to width; embolus slightly flattened, flake-shaped; median apophysis triangular.

Figures

Figure 7. Zamilia sheini Jiang & Li, sp. nov., holotype male (IZCAS-Ar42685Fo). A. Right palp, ventral view; B. Left palp, ventral view; C–D. Right palp (C. Retrolateral view; D. Apical view). Scale bars:A, C=0.10mm; B, D =0.05mm.

Figure 8. Zamilia sheini Jiang & Li, sp. nov., holotype male (IZCAS-Ar42685Fo). A–B. Habitus (A. Dorsal view; B. Ventral view); C. Ocular area, dorsal view; D. Spinnerets, ventral view. Scale bars:A–B=0.50mm; C–D=0.10mm.

Figure 9. Zamilia sheini Jiang & Li, sp. nov., holotype male (IZCAS-Ar42685Fo), left palp, ventral view. Scale bar=0.05mm.