Chinja chinja, Polotow & Griswold, 2018

Polotow, Daniele & Griswold, Charles, 2018, Chinja, a new genus of spider from the Eastern Arc Mountains of Tanzania (Araneae, Zoropsidae), Zootaxa 4472 (3), pp. 545-562: 548-552

publication ID

https://doi.org/10.11646/zootaxa.4472.3.7

publication LSID

lsid:zoobank.org:pub:2D7783CA-C651-4C7C-8611-4662F5E1CAB2

DOI

http://doi.org/10.5281/zenodo.5977084

persistent identifier

http://treatment.plazi.org/id/0D171D6C-177F-1D3E-FF79-F8CF67E3311C

treatment provided by

Plazi

scientific name

Chinja chinja
status

sp. nov.

Chinja chinja   sp. nov.

Figures 1 View FIGURE 1 , 2B–C View FIGURE 2 , 3 View FIGURE 3 , 5 View FIGURE 5 , 6 View FIGURE 6 , 7 View FIGURE 7 , 10 View FIGURE 10

Type material. Holotype male from East Usambara Mountains at Amani, 5°5.7'S, 38°38'E, elev. 950 m, lringa GoogleMaps  

Region , Tanzania, collected 1–10 November 1995 by C. Griswold, D. Ubick, and N. Scharff, CASENT9006127, deposited in CAS.  

Etymology. The species epithet is an arbitrary combination of letters.

Diagnosis. Males of C. chinja   can be distinguished from those of C. scharffi   by having the apex of the embolus jagged or irregular in outline ( Figs 3B View FIGURE 3 , 7F View FIGURE 7 ), with the proximal margin of the embolus entire ( Figs 3A View FIGURE 3 , 7A, E View FIGURE 7 ), in having a retrodorsal projection middorsally on the palpal tibia ( Fig. 3C View FIGURE 3 ), and the RTA with the ventral branch broad and the retrobasal branch pointed ( Fig. 3C View FIGURE 3 ). The females of C. chinja   can be distinguished from those of C. scharffi   by having the epigynum lateral teeth narrower ( Fig. 3D View FIGURE 3 ) and the median plate not extending as far posteriad ( Figs 3D View FIGURE 3 , 6A View FIGURE 6 ) as in C. scharffi   ( Fig. 4D View FIGURE 4 ).

Description. Male (holotype): Total length 3.40. Markings as in Fig. 1A View FIGURE 1 . Carapace 2.05 long, 1.30 wide, 0.75 high; clypeus 0.90 high. Eye diameters: AME 0.06, ALE 0.10, PME 0.09, PLE 0.10. Chelicerae 0.70 long; sternum 0.95 long, 0.90 wide; labium 0.30 long, 0.30 wide; palpal coxae 0.55 long, 0.25 wide. Spination: palp: d0-0-1, p0- 0-1, r0-0-1; leg I: femur d1-1-1, p0-0-2, tibia p0-1-1-0, v2-2 -2-2, metatarsus p0-1-0, v2-2 -2; leg II: femur d1-1-1, p0-0-1, tibia p0-1-1-0, r0-1-0-0, v2-2 -2-2 [retroventral spines much stouter than proventral], metatarsus p0-1-2-0, r0-1-1-0, v2-2 -2; leg III: femur d0-1-1-1, p0-1-1-0, r0-0-2, tibia d0-1-1-0, p0-1-1-0, r0-1-1-0, v2-2 -2, metatarsus d1-0-0-0, r0-1-2-0, v2-2 -2; leg IV: femur d0-1-1-1, p0-0-1-2, r0-0-1-1, tibia d0-1-1-0, p0-0-1-1, r0-0-1-1, v2-2 -2, metatarsus p1-1-1, r0-1-1, v2-2 -2. Leg measurements (Femur + Patella + Tibia + Metatarsus + Tarsus = [Total]): I: 1.80 + 0.80 + 1.70 + 1.30 + 0.90 = [6.50]; II: 1.60 + 0.80 + 1.30 + 1.15 + 0.80 = [5.65]; III: 1.50 + 0.65 + 1.10 + 1.30 + 0.75 = [5.30]; IV: 1.95 + 0.80 + 1.65 + 1.95 +1.15 = [7.50]; palpus: 0.80 + 0.30 + 0.40 + NA + 0.70 = [2.20]. Palp: palpal cymbium 0.88 femur length, tibia with a retrodorsal projection middorsally ( Fig. 3C View FIGURE 3 ), and RTA with ventral branch broad and the retrobasal branch pointed ( Fig. 3C View FIGURE 3 ); tegulum with large prolateral projection ( Fig. 3A View FIGURE 3 ); MA short, less than ½ length of tegulum, with an apical hook ( Figs 3A, C View FIGURE 3 , 7D–G View FIGURE 7 ); apex of embolus jagged or irregular in outline ( Figs 3B View FIGURE 3 , 7F View FIGURE 7 ), with proximal margin of the embolus entire ( Figs 3A View FIGURE 3 , 7A, E View FIGURE 7 ); prolateral locking lobe present ( Fig. 3B View FIGURE 3 ). Female (Amani, CASENT9006132): Total length 3.70. Markings as in male and as in Figs 1B View FIGURE 1 , 2B–C View FIGURE 2 . Carapace 1.75 long, 1.35 wide, 0.56 high; clypeus 0.03 high. Eye diameters: AME 0.05, ALE 0.10, PME 0.09, PLE 0.11. Chelicerae 0.84 long; sternum 0.95 long, 0.85 wide; labium 0.30 long and wide; palpal coxae 0.60 long, 0.25 wide. Spination: palp: femur d0-0-1-1, tibia d0-1-0, p0-1-0, tarsus d0-1-0, p0-2-1-0; leg I: femur d0-0-0-1, tibia v2-2 -2, metatarsus v2-2 -2; leg II: femur d10-0-0, tibia v2-2 -2-2 [retroventral spines much stouter than proventral], metatarsus v2-2 -2; leg III: femur d1-1-1, tibia d0-1-0, p1-0-1-0, r1-0-1-0, v1 [pv.]-2-2, metatarsus p0-1-0-2, r0-1-0-0, v2-2 -2; leg IV: femur d1-0-0-0, r0-0-0-1, tibia d0-1-1-0, p1-0-0-1, r0-1-0-1, v1 [pv.]-2-2, metatarsus d1-0-0-0, p1-0-0-2, r0-1-0-2, v0-2-2-2. Leg measurements (Femur + Patella + Tibia + Metatarsus + Tarsus = [Total]): I: 1.50 + 0.70 + 1.25 + 1.00 + 0.75 = [5.20]; II: 1.20 + 0.70 + 1.00 + 0.95 + 0.90 = [4.75]; III: 1.20 + 0.55 + 0.85 + 1.00 + 0.70 = [4.30]; IV: 1.55 + 0.65 + 1.40 + 1.60 + 0.90 = [6.10]; palpus: 0.65 + 0.35 + 0.35 + NA + 0.60 = [1.95]. Epigynum lateral teeth narrow ( Fig. 3D View FIGURE 3 ) and median lobe not extending as far posteriad ( Figs 3D View FIGURE 3 , 6A View FIGURE 6 ) as in C. scharffi   ( Fig. 4D View FIGURE 4 ); vulva as in Fig. 3E View FIGURE 3 .

Variation. Male (N=10): total length 2.40–3.80; ratios of carapace length/width1.30–1.38, carapace width/ height 2.07–2.90, PER /AER 1.21–1.34, OAL/OQL 1.07–1.33, cheliceral length/clypeal height 18.67–30.00, sternum length/width 1.06–1.40, length femur I/carapace length 0.80–0.93, palpal tarsus/femur 0.85–1.20. Female (N=10): total length 3.70–5.00; ratios of carapace length/width 1.30–1.57, carapace width/height 1.91–2.88, PER / AER 1.20–1.37, OAL/OQL 1.00–1.27, cheliceral length/clypeal height 25.00–36.67, sternum length/width 1.06– 1.22, length femur I/carapace length 0.74–0.89, palpal tarsus/femur 0.87–1.00.

Material examined. TANZANIA: lringa Region: East Usambara Mts. , Amani, 5°5.7'S, 38°38'E, elev. 950 m, [palpus drawn] 1–10 November 1995, C. Griswold, D. Ubick, and N. Scharff leg., holotype ♂, CASENT9006127 ( CAS); 1♂, 2♀, CASENT9006126 ( CAS); 1♂, 1♀, CASENT9065520 ( CAS); collected by sifting leaf litter from tree buttress, [measured], 1♀, CASENT9006132 ( CAS); pitfall traps, 1–10 November 1995, C. Griswold, D. Ubick, and N. Scharff leg., 1♂, CASENT9006130 ( CAS); Amani, East Usambara Mts. , elev. 1000m, [SEM preparation 16-8], 15 June 1980, M. Stoltze & N. Scharff leg., 1♂, CASENT9006135 ( ZMUC); Sangarawe Forest , 5°6.5'S, 38°35.7'E, elev. 990 m, 5–6 November 1995, C. Griswold , D. Ubick, and N. Scharff leg., 1♀, CASENT9006133 ( CAS); 1♂, CASENT9006123 ( CAS); 12 km SE Amani, Kihuhwi-Zigi Forest Reserve, 5°6.3'S, 38°40.6'E GoogleMaps   , 400–450 m elev., [female habitus drawn, JS], 2–4 November 1995, C. Griswold, D. Ubick, and N. Scharff leg., 1♀, CASENT9006139 ( CAS); 1♀, CASENT9006138 ( CAS), [SEM preparation, ♀ opisthosoma, stub 19-1], 1♀, CASENT9006140 ( CAS); 2♀, 3 juveniles, CASENT9006124 ( CAS); 2♀, 2 juveniles, CASENT9006125 ( CAS); sifting leaf litter, 4 November 1995, D. Ubick, 1♀, CASENT9006134 ( CAS); Tanga Region: Muheza District , Marimba Forest Reserve , 5°01'S, 38°41'E, 1995, Frontier Tanzania Expeditions leg., 1♂, CASENT9065521 ( ZMUC); Kambai Forest Reserve, 4°59'S, 38°41'E, 1995, pitfall traps in vegetation plot #27, Frontier Tanzania Expeditions leg., 4♂, CASENT9006137 ( ZMUC); pitfall traps in vegetation plot #30, Frontier Tanzania Expeditions leg., 2♂, CASENT9006136 ( ZMUC). GoogleMaps  

Natural history. This species occurs in the leaf litter and on the soil surface of closed-canopy, moist forest.

Distribution. Eastern Usambara Mountains, Tanzania ( Fig. 10 View FIGURE 10 ).

CAS

California Academy of Sciences

PER

City Museum

ZMUC

Zoological Museum, University of Copenhagen

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Zoropsidae

Genus

Chinja