Chinja scharffi, 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: 552-559

publication ID

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

publication LSID

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

persistent identifier

http://treatment.plazi.org/id/0D171D6C-177B-1D37-FF79-F8B067B13080

treatment provided by

Plazi

scientific name

Chinja scharffi
status

sp. nov.

Chinja scharffi   sp. nov.

Figures 2A View FIGURE 2 , 4 View FIGURE 4 , 8–10 View FIGURE 8 View FIGURE 9 View FIGURE 10

Type material. Holotype male from a pitfall trap at 1250 m elevation in the Mwanihana Forest above Sanje , Uzungwa Mountains, 7°44'28.3"S 36°54'22.1"E, Morogoro Region, Tanzania, collected 25 July 1982 by M. Stolze & N. Scharff, CASENT9006146, deposited in the Zoological Museum of the University of Copenhagen ( ZMUC) GoogleMaps   . Paratype female, collected by sifting leaf litter in Mwanihana Forest above Sanje, Uzungwa Mountains, elev. 1000 m, 7°44'28.3"S 36°54'22.1"E, Morogoro Region, Tanzania, 1 August 1982, M. Stoltze & N. Scharff leg., CASENT9006157, also deposited in ZMUC GoogleMaps   .

Etymology. The species epithet is a patronym in honor of Nikolaj Scharff, a leader in biodiversity studies and conservation in the Eastern Arc Biotic Hotpot of Tanzania and collector of this and many other endemic Eastern Arc species.

Diagnosis. Males of C. scharffi   can be distinguished from those of C. chinja   by having the apex of the embolus evenly truncate in outline, and a recurved flange along the proximal margin of the embolus ( Figs 4A –B View FIGURE 4 , 8A –B View FIGURE 8 ), by lacking a middorsal projection on the palpal tibia ( Fig. 4C View FIGURE 4 ), and by the RTA with both the ventral and retrobasal branches pointed ( Fig. 8G –H View FIGURE 8 ). The females of C. scharffi   can be distinguished from those of C. chinja   by having the lateral teeth of the epigynum relatively broad and the median plate extending more posteriad ( Fig. 4D View FIGURE 4 ).

Description. Male (holotype, CASENT9006146): Total length 3.10. Markings as in Fig. 2A View FIGURE 2 . Carapace 1.65 long, 1.25 wide, 0.50 high; clypeus 0.03 high. Eye diameters: AME 0.05, ALE 0.09, PME 0.06, PLE 0.08. Chelicerae 0.61 long; sternum 0.80 long, 0.70 wide; labium 0.25 long and wide; palpal coxae 0.45 long, 0.20 wide. Spination: palp: femur d0-0-1-2, p0-0-0-1; leg I: femur d0-1-1-0, p0-0-0-1, tibia v2-2 -2-2, metatarsus v2-2 -2; leg II: femur d0-1-1-0, p0-0-0-1, tibia p0-0-1-0, v2-2 -2-2 [retroventral spines much stouter than proventral], metatarsus p1-1-0-0, v2-2 -2; leg III: femur d1-1-1, p0-0-1-1, r0-0-1-1, tibia d0-1-10, p0-1-1-0, r0-1-1-0, v1-2 -2, metatarsus p0-2-2, r0-2-0-1, v2-2 -2; leg IV: femur d1-1-0-0, p0-0-1-1, r0-0-1-1, tibia d1-0-0, p0-1-1-0, r0-1-1-0, v1-2 -2, metatarsus: d1-0-0-0, p1-1-0-2, r0-1-2-0, v2-2 -2. Leg measurements (Femur + Patella + Tibia + Metatarsus + Tarsus = [Total]): I: 1.25 + 0.60 + 1.15 + 1.00 + 0.70 = [4.70]; II: 1.20 + 0.60 + 0.90 + 0.85 + 0.65 = [4.20]; III: 1.00 + 0.50 + 0.80 + 0.95 + 0.70 = [3.95]; IV: 1.45 + 0.60 + 1.25 + 1.50 + 0.85 = [5.65]; palpus: 0.55 + 0.30 + 0.25 + NA + 0.60 = [1.70]. Palp: palpal tibia 0.44 of cymbial length, RTA with ventral and retrobasal branches pointed, about equal in size ( Figs 4A, C View FIGURE 4 , 8G –H View FIGURE 8 ), tibia lacking retrodorsal projection ( Fig. 4C View FIGURE 4 ), apex of embolus evenly truncate in outline, with a recurved flange along the proximal margin of embolus ( Figs 4A –B View FIGURE 4 , 8A –B View FIGURE 8 ).

Female (paratype, CASENT9006157): Total length 4.00. Markings as in male. Carapace 1.90 long, 1.40 wide, 0.65 high; clypeus 0.03 high. Eye diameters: AME 0.06, ALE 0.11, PME 0.08, PLE 0.10. Chelicerae 0.73 long; sternum 0.90 long, 0.80 wide; labium 0.25 long, 0.30 wide; palpal coxae 0.60 long, 0.28 wide. Spination: palp: femur d0-0-1-1, tibia p0-1-0-0, r0-1-0-0, tarsus p0-2-0-1; leg I: tibia v2-2 -2, metatarsus v2-2 -2; leg II: tibia v2-2 -2- 2 [retroventral spines much stouter than proventral], metatarsus v2-2 -2; leg III: femur d0-1-0-1, p0-0-0-1, tibia d0- 1-10, p0-1-1-0, r0-1-1-0, vv1-2-2, metatarsus p0-1-0-2, r0-1-0-2, v2-2 -2; leg IV: femur d1-1-0-0-0, tibia d0-1-0, p0-1-0, r0-1-0, v1-2 -2, metatarsus p1-1-0-2, r1-0- 02, v2-2 -2. Leg measurements (Femur + Patella + Tibia + Metatarsus + Tarsus = [Total]): I: 1.40 + 0.70 + 1.15 + 1.00 + (abs) = [NA]; II: 1.35 + 0.60 + 1.00 + 0.85 + 0.60 = [4.40]; III: 1.20 + 0.55 + 0.85 + 1.00 + 0.70 = [4.30]; IV: 1.55 + 0.65 + 1.40 + 1.50 + (abs) = [NA]; palpus: 0.70 + 0.35 + 0.40 + NA + 0.60 = [2.05]. Epigynum with lateral teeth relatively broad and median plate extending more posteriad ( Fig. 4D View FIGURE 4 ) than in C. chinja   ( Fig. 3D View FIGURE 3 ); vulva as in Fig. 4E View FIGURE 4 .

Variation. Male (N= 11): total length 2.90–4.00; ratios of carapace length/width 1.28–1.56, carapace width/ height 1.93–3.10, PER /AER 1.14–1.36, OAL/OQL 1.09–1.27, cheliceral length/clypeal height 20.00–45.00, sternum length/width 1.00–1.21, length of femur I/carapace length 0.75–0.85, palpal tarsus/femur length 0.88– 1.09. The recurved flange along the proximal margin of the embolus varies in development, being large in the Uluguru specimens and some Uzungwa specimens, and a weakly developed fold in other Uzungwa specimens. The species lacks a developed middorsal process on the palpal tibia, characteristic of C. chinja   , but this area may be slightly raised in some specimens. Female (N= 4): total length 4.00–4.80; ratios of carapace length/width 1.28– 1.36, carapace width/height 2.15–2.90, PER /AER 1.26–1.36, OAL/OQL 0.94–1.24, cheliceral length/clypeal height 20.00–35.00, sternum length/width 1.12–1.21, length femur I/carapace length 0.73–0.83, palpal tarsus/ femur length 0.87–1.07.

M aterial examined: TANZANIA: Morogoro Region: Uluguru Mountains , Lupanga West, elev. 1600 m, 6°52'03.5"S 37°43'05.8"E, pitfall trap [SEM prep. palpus, Stub 18-9], 1 July 1981, M. Stoltze & N. Scharff leg., 1 Ƌ, CASENT9006141 ( ZMUC) GoogleMaps   ; 1 ♀, CASENT9006143 (ZMUC); 1 juvenile, CASENT9006144 (ZMUC); Uluguru Mountains, Lupanga East , elev. 1100 m, 6°51'39.2"S 37°45'50.1"E, pitfall trap, [SEM prep. leg], 10 July 1981, M. Stoltze & N. Scharff leg., 1 ♀, CASENT9006142 ( ZMUC) GoogleMaps   ; Uzungwa Mountains, Mwanihana Forest above Sanje , 7°44'28.3"S 36°54'22.1"E, all from pitfall traps, elev. 900 m, 1 August 1982, M. Stoltze & N. Scharff leg., 1♂, CASENT9006160 ( ZMUC) GoogleMaps   ; elev. 1000 m, litter, 1 August 1982, M. Stoltze & N. Scharff leg., 1♀, paratype, CASENT9006157 (ZMUC); 1 August 1982, 1♂, CASENT9006151 (ZMUC); elev. 1100 m, 18 July 1982, M. Stoltze & N. Scharff leg., 1♂, CASENT9006155 (ZMUC); elev. 1250 m, 25 July 1982, M. Stoltze & N. Scharff leg., [habitus drawn JS], 1♂, HOLOTYPE, CASENT9006146 (ZMUC); 1♂, CASENT9006162 (ZMUC); 18 August 1982, 1 juvenile, CASENT9006153 (ZMUC); elev. 1400 m, 15 August 1982, M. Stoltze & N. Scharff, 1♂, CASENT9006154 (ZMUC); elev. 1650 m, litter, 18 July 1982, M. Stoltze & N. Scharff leg., [left palpus drawn], 1♂, CASENT9006145 (ZMUC); 18 August 1982, M. Stoltze & N. Scharff leg., 1♂, CASENT9006159 (ZMUC); Mwanihana Forest Reserve, 7°49'04.9"S 36°50'39.9"E, elev. 700 m, pitfall traps in lowland rain forest, 8–16 September 1984, N. Scharff leg., 1♀ 1♂, CASENT9006149 ( ZMUC) GoogleMaps   ; 2♂, CASENT9006147 (ZMUC); 2♂, CASENT9065518 (CAS); Mwanihana Forest Reserve, 7°49'04.9"S 36°50'39.9"E, elev. 1650 m, pitfall traps in montane rain forest, 25–29 September 1984, N. Scharff, 1♂, CASENT9006161 ( ZMUC) GoogleMaps   ; elev. 1800–1850 m, pitfall traps in montane rain forest, 25–29 September 1984, N. Scharff, [SEM prep. Stub16:4, right palp, leg I], 1♂, CASENT9006150 (ZMUC); 1♂, CASENT9006152 (ZMUC), 3♂, CASENT9006158 (ZMUC); 2♂, CASENT9065519 (CAS).

Natural history. This species occurs in the leaf litter and on the soil surface of closed-canopy, moist forest, and is found at low (700 m) to high (1850 m) elevations.

Distribution. Uzungwa and Uluguru Mountains, Tanzania ( Fig. 10 View FIGURE 10 ).

ZMUC

Zoological Museum, University of Copenhagen

PER

City Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Zoropsidae

Genus

Chinja