Mimetus dentatus, Liu & Xu & Hormiga & Yin, 2021

Liu, Jinxin, Xu, Xiang, Hormiga, Gustavo & Yin, Haiqiang, 2021, New species of the pirate spider genus Mimetus Hentz, 1832 from China with a cladistic hypothesis on their phylogenetic placement (Araneae, Mimetidae), Zootaxa 5020 (1), pp. 1-30 : 14-18

Mimetus dentatus new species

http://zoobank.org/ EDB94DE9-FA01-4D16-9A1D-924FF6C48691

Figs 11–15

Type material. Holotype ♂ (Mime-0129- HNU): China, Guangxi Zhuang Autonomous Region: Nanning City , Shanglin County, Damingshan National Nature Reserve , 23°28.07'N, 108°30.49'E, 810 m, 8.XI.2018, Ailan He, Keke Liu, Jihe Liu, Jinxin Liu and Zongguang Huang leg. ; Paratype: 1♀ (Mime-0128- HNU), same data as holo- type .

Etymology. The specific name is derived from the Latin adjective “dentatus”, in reference to the dentate subtegular apophysis.

Diagnosis. The males of M. dentatus n. sp. differ from those of all other Mimetus species by the beak-shaped subtegular apophysis with dentiform projections and by the digitiform cymbial apex ( Figs 11F–H , 14B–D ). The females of M. dentatus n. sp. differ from those of M. subulatus n. sp. and M. niveosignatus n. sp. by having the medial spermathecal chambers separated from each other ( Figs 13B–D , 15B ).

Description. Male (Holotype). Habitus as in Fig. 11A . Total length 2.02. Carapace 0.90 long, 0.75 wide. Opisthosoma 0.96 long, 1.01 wide. Sternum 0.51 long and 0.47 wide. Labium wider than long. Clypeus height 0.10. Eye sizes and interdistances: AME 0.09, ALE 0.07, PME 0.07, PLE 0.08, AME–AME 0.05, ALE–AME 0.05, PME–PME 0.03, PME–PLE 0.05. MOA 0.07 long, anterior width 0.04, posterior width 0.03. Leg measurements in Table 4.

Cephalothorax ( Fig. 11A–C ): Carapace yellowish, long oval, widest at coxae II and III; with a large deep yellow pattern (both lateral margins of pattern are wavelike lines) between ocular area and fovea, with three longitudinal rows of setae; a pair of brown patches on the lateral margins of carapace near Coxa I; fovea inconspicuous. Sternum yellowish. Labium yellow. Chelicerae ( Fig. 15C, D ) deep yellow, with six promarginal peg teeth and two retromarginal teeth. Endites deep yellow, longer than wide. Leg color similar to carapace, with irregular dark brown blotches.

Abdomen ( Fig. 11A, C, D ): Grey, nearly tetrahedral, as long as wide, especially wide in the medial region, covered with many whitish patches, a few dark brown patches and many short setae dorsally.

Pedipalp ( Figs 11E–H , 14A–D ): Tibia long and thin, approximately twice as long as cymbium, covered with some macrosetae, slightly swollen distally; cymbium subtriangular, with many especially long setae dorsally, apically digitiform. Paracymbium broad and triangular, with a translucent base. Subtegular apophysis extremely developed, beak-shaped, denticulate. Conductor sclerotized area complex, whorled and rolled up, forming several apophyses including one protecting the apical end of embolus. Conductor membranous area with pilose cuticular projections. Embolus tubular, strongly curved around the membranous area of conductor and forming ca. 3/4 circle, proximally swollen.

Female (Paratype, Mime-0128-HNU). Similar to male in general features, deeper coloration than male ( Fig. 12A ). Total length 2.11. Carapace 0.92 long, 0.83 wide. Opisthosoma 1.10 long, 1.33 wide. Sternum 0.55 long and 0.44 wide. Labium wider than long. Clypeus height 0.11. Eye sizes and interdistances: AME 0.09, ALE 0.08, PME 0.09, PLE 0.08, AME–AME 0.04, ALE–AME 0.04, PME–PME 0.03, PME–PLE 0.05. MOA 0.10 long, anterior width 0.04, posterior width 0.03. Leg measurements see Table 5.

Cephalothorax ( Fig. 12A–C ): Carapace yellowish, with a broad yellow-brown pattern medially. Sternum yellowish. Labium brown. Chelicerae ( Fig. 15E, F ) brown, with six promarginal peg teeth and two retromarginal teeth.

Abdomen ( Fig. 12A, B ): Light brown, but brown patches darker than male.

Epigynum ( Figs 13A–D , 15A, B ): atrium small, arc-shaped. Basal plate squared, twice as wide as long, with straight posterior margin. Copulatory openings and copulatory ducts not to be seen. Medial spermathecal chamber pair separated from each other ca. 0.7 times a medial spermathecal diameter, and lateral spermathecal chambers broadly connected to medial chambers. Fertilization ducts small.

Distribution. China (Guangxi) ( Fig. 23 )

Figures

FIGURE 11. Mimetus dentatus n. sp., male holotype. A, habitus, dorsal view; B, cephalothorax, frontal view; C, ditto, lateral view; D, abdomen, lateral view; E, left palp, prolateral view; F, right palp, ventral view; G, left palp, frontolateral view; H, ditto, retrolateral view; I, femur of left leg I, retrolateral view; J, left legs I and II, retrolateral view; K, left legs III and IV, retrolateral view. Scale bars: A, J, K, 0.5mm; B–D, 0.2mm; E–H, 0.05mm; I, 0.1mm.

FIGURE 12. Mimetus dentatus n. sp., female paratype. A, habitus, dorsal view; B, ditto, lateral view; C, cephalothorax, frontal view; D, left legs I and II, retrolateral view; E, left legs III and IV, retrolateral view; F, femur of left leg I, retrolateral view. Scale bars: A, 0.3mm; B, 0.5mm; C, 0.2mm; D, E, 1mm; F, 0.1mm.

FIGURE 13. Mimetus dentatus n. sp., epigynum of paratype. A, ventral view; B, D, dorsal view; C, ventral view (slight slant). Abbreviations: FD = fertilization ducts. Scale bars: A–D, 0.05mm.

FIGURE 14. Mimetus dentatus n. sp., male holotype. A, left palp, prolateral view; B, ditto, frontolateral view; C, right palp, ventral view; D, left palp, retrolateral view. Abbreviations: CA = cymbial apex, Cy = cymbium, E = embolus, MCO = membranous conductor, PC = paracymbium, PCP = pilose cuticular projections, SCO = sclerotized conductor, ST = subtegulum, STA = subtegular apophysis, T = tegulum. Scale bars: A–D, 0.1mm.

FIGURE 15. Mimetus dentatus n. sp., female paratype and chelicera of male holotype. A, epigynum, ventral view; B, ditto, dorsal view; C, right chelicera of male holotype, retrolateral view; D, ditto, prolateral view; E, chelicera of female paratype, prolateral view; F, ditto, retrolateral view.Abbreviations: A = atrium, BP = basal plate, FD = fertilization ducts, Sp = spermathecae. Scale bars: A–F, 0.05mm.

FIGURE 23. Localities of Mimetus spp. found in the area covered in the map.