Apochinomma medog, Zhang & Zhang, 2023

Zhang, Lu & Zhang, Feng, 2023, First report of the genus Apochinomma Pavesi, 1881 from China, with description of a new species (Araneae, Corinnidae, Castianeirinae), Zootaxa 5323 (3), pp. 446-450 : 446-449

publication ID

https://doi.org/ 10.11646/zootaxa.5323.3.11

DOI

https://doi.org/10.5281/zenodo.8221501

persistent identifier

https://treatment.plazi.org/id/A31187F6-E65B-FFF1-FF1D-F906FD779995

treatment provided by

Plazi

scientific name

Apochinomma medog
status

sp. nov.

Apochinomma medog sp. nov. (MffiȐĦ)

Figs 1‒2 View FIGURE 1 View FIGURE 2

Type material. Holotype ♁ (HBUARA#2022-018), CHINA: Tibet, Motuo County, Motuo Town (29.296265°N, 95.280296°E, Alt. 800.44m), 30.V.2022, leg. Bo Liu, MHBU GoogleMaps . Paratypes: 1♀, same data as holotype GoogleMaps ; 1♀ (XZMT-18- 72), CHINA: Tibet, Motuo County, Yarang Village (29°17.758′N, 95°16.827′E, Alt. 761m), 28.VI.2018, leg. Luyu Wang, MHBU GoogleMaps .

Etymology. The specific name refers to the type locality.

Diagnosis. The new species morphologically resembles A. formicaeformis Pavesi, 1881 in genital characteristics, but can be distinguished from the latter by: 1) the straight embolus tip (vs the curved embolus tip in A. formicaeformis ) (cf. Fig. 2B–C View FIGURE 2 with fig. 10A–B in Haddad 2013); 2) middle spermathecae separated (vs middle spermathecae contiguous in A. formicaeformis ) (cf. Fig. 2D–E View FIGURE 2 with fig. 10C–D in Haddad 2013). In addition, this new species morphologically resembles A. nitidum , but can be distinguished from the latter by: 1) the short embolus with thick tip (vs long embolus with slender and cambered tip in A. nitidum ) (cf. Fig. 2A–C View FIGURE 2 with fig. 483 in Deeleman-Reinhold, 2001); 2) copulatory ducts transverse, curved (vs middle with loop in A. nitidum ) (cf. Fig. 2E View FIGURE 2 with fig. 486 in Deeleman-Reinhold, 2001).

Description. Male (holotype) ( Fig. 1A–D View FIGURE 1 ): TL 6.55; CL 3.55, CW 2.03; AL 3.89, AW 2.14. Eye sizes and interdistances: AME 0.53, ALE 0.32, PME 0.35, PLE 0.30; AME–AME 0.83, AME–ALE 0.68, ALE–ALE 2.15, PME– PME 1.33, PME–PLE 1.41, PLE–PLE 3.25, ALE–PLE 1.22; CW: AERW = 2.60: 1; CW: PERW = 1.61: 1; MOA 0.18 long; anterior width 0.23, posterior width 0.33. Clypeal height 0.20. Measurements of legs: I 5.71 (1.55, 0.44, 1.47, 1.34, 0.91), II 5.12 (1.37, 0.37, 1.37, 1.21, 0.80), III 5.11 (1.34, 0.50, 1.24, 1.31, 0.72), IV 7.38 (2.06, 0.61, 1.76, 2.04, 0.91). Carapace black, elongate oval, with short and narrow fovea. Sternum black, shield-shaped and surface with white, sparse plumose hair. Abdomen oval, laterally constricted, posteriorly gradually widened; dorsum black, anteriorly with short and cylindrical collar. Dorsal scutum large, nearly covered abdomen. Venter with deep red-brown rectangular ventral sclerite; inframamillary sclerite red-brown, subtriangular.

Palp ( Fig. 2A–C View FIGURE 2 ). Tibia with an apophysis in ventral surface. Tegulum pear-shaped, yellow-brown, with black insemination. Embolus short, with single coil, basal section broad; embolus tip obviously tapering and weakly curved, directed prolaterally.

Female (paratype) ( Fig. 1E, F View FIGURE 1 ): TL 6.74; CL 3.31, CW 1.90; AL 3.43, AW 2.74. Eye sizes and interdistances: AME 0.41, ALE 0.32, PME 0.27, PLE 0. 22; AME–AME 0.68, AME–ALE 0.46, ALE–ALE 1.55, PME–PME 0.98, PME–PLE 0. 94, PLE–PLE 2.69, ALE–PLE 1.03; CW: AERW = 2.57: 1; CW: PERW = 1.65: 1; MOA 0.16 long; anterior width 0.40, posterior width 0.52. Clypeal height 0.20. Measurements of legs: I 7.43 (1.99, 0.57, 2.00, 1.68, 1.19), II 6.96 (1.91, 0.55, 1.86, 1.60, 1.04), III 6.29 (1.70, 0.54, 1.60, 1.54, 0.91), IV 9.18 (2.60, 0.74, 2.27, 2.54, 1.03). Other characteristics as in the male, except dorsal scutum extending about half the length of abdomen and without ventral sclerite.

Epigyne ( Fig. 2D, E View FIGURE 2 ). Copulatory openings oblique and situated laterally in posterior of epigastric plate. Copulatory ducts transverse, curved and extended into spermathecae. Fertilization duct thin, short, lying the secondary spermathecae. Anterior spermatheca globular, adjacent; posterior spermathecae slender, tubular, separated.

Distribution. China (Xizang Autonomous Region).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Corinnidae

Genus

Apochinomma

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