Bicornoculus wunnai 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 : 46-48

publication ID

https://doi.org/ 10.11865/zs.2022101

publication LSID

lsid:zoobank.org:pub:1C62670D-1CEB-4A0C-8A12-D8824F6B61DA

persistent identifier

https://treatment.plazi.org/id/743FB854-090B-BC4A-B1F1-CD59FD0FFE9A

treatment provided by

Felipe (2022-10-09 06:16:45, last updated by Plazi 2023-11-07 18:26:35)

scientific name

Bicornoculus wunnai Jiang & Li
status

sp. nov.

Bicornoculus wunnai Jiang & Li , sp. nov. ( Figs 40–42 View Figure 40 View Figure 41 View Figure 42 )

Holotype. Male (IZCAS-Ar42698Fo). 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. This species resembles B. granulan s (see Wunderlich, 2020: 88, figs 78–79) by the apophysis of the bulb but can be distinguished by the shape of the embolus ( Fig. 40B View Figure 40 ). In B. wunnai Jiang & Li , sp. nov., the distal part of the embolus is strongly hooked, but the embolus of B. granulan s is straight.

Description. Male. Total length 1.92; carapace 0.91 long, 0.62 wide; opisthosoma 1.01 long, 0.56 wide. Left palp: - (0.24 + - + -), left leg I: - (0.85 + - + - + - + -), leg II: - (0.58 + - + - + - + -), leg III: - (0.55 + - + - + - + -), leg IV: - (0.69 + - + - + - + -); right palp: - (0.23 + - + -), right leg I: - (0.75 + - + - + - + -), leg II: - (0.62 + - + - + - + -), leg III: - (0.57 + - + - + - + -), leg IV: - (0.61 + - + - + - + -). Eye sizes: ALE 0.05, PLE 0.06, PME 0.06, eyes interdistances not visible. Habitus as in Figs 41A–B View Figure 41 . Carapace ( Figs 41A–B View Figure 41 ) reticulated, brown; clypeus brown; six eyes ( Fig. 41C View Figure 41 ) almost ovoid, ALE <PLE = PME; sternum reticulated, rugose. Opisthosoma ( Figs 41A–D View Figure 41 ): Scutum long, oval, covered with long setae, reticulated, center granulated; ventral scutum reticulated, margin rugose.

Palp ( Figs 40A–B View Figure 40 , 42 View Figure 42 ). Bulb long, deformed, S-shaped in dorsal view, bent twice; embolus sclerotized, slender; distal part of embolus fishhook shaped, tip slightly hooked.

Wunderlich, J., 2020. New and already described fossil spiders (Araneae) of 20 families in Mid Cretaceous Burmese amber with notes on spider phylogeny, evolution and classification. In: Wunderlich, J. (ed.), Beitrage zur Araneologie, Vol. 13. Hirschberg, Germany. pp. 22 - 164.

Gallery Image

Figure 40. Bicornoculus wunnai Jiang & Li, sp. nov., holotype male (IZCAS-Ar42698Fo). A. Right palp, dorsal view; B. Left palp, dorsal view. Scale bars=0.05mm.

Gallery Image

Figure 41. Bicornoculus wunnai Jiang & Li, sp. nov., holotype male (IZCAS-Ar42698Fo). A–B. Habitus (A. Dorsal view; B. Ventral view); C. Ocular area, dorsal view; D. Claw, ventral view. Scale bars:A–B=0.50mm; C–D=0.10mm.

Gallery Image

Figure 42. Bicornoculus wunnai Jiang & Li, sp. nov., holotype male (IZCAS-Ar42698Fo), left palp, dorsal view. Scale bar=0.10mm.