Stenaelurillus belihuloya, Logunov & Azarkina, 2018

Logunov, Dmitri V. & Azarkina, Galina N., 2018, Redefinition and partial revision of the genus Stenaelurillus Simon, 1886 (Arachnida, Araneae, Salticidae), European Journal of Taxonomy 430, pp. 1-126 : 25-31

Stenaelurillus belihuloya sp. nov.

urn:lsid:zoobank.org:act:6D137A2F-C833-4DFE-BFC7-0ECB2A7E3F02 Figs 79–86 , 509

Diagnosis

The male of the new species is most similar with that of S. albus described recently from Western Ghats in India (cf. Sebastian et al. 2015: Figs 2 A–G, 8A–I), but can be readily distinguished from it by the different shape of the embolus and retrolateral tibial apophsyis, as well as by the body coloration: viz., the absence of a wide white transverse band at the anterior end of the dorsum, the less-pronounced white marginal band on the carapace, and the monochrome palp colour.

Etymology

The specific epithet is a noun in apposition taken from the type locality, the village Belihuloya in the Sabaragamuwa Province of Sri Lanka.

Material examined

Holotype

SRI LANKA: ♂, Sabaragamuwa Prov., Ratnapura Distr., Belihuloya , 6°43′06.2″ N, 80°46′26.7″ E, 10– 14 Feb. 1969, F. Hill leg. ( ZMTU).

Description

Male

Measurements: carapace 2.50 long, 1.75 wide and 1.13 high at PLE. Ocular area: 1.05 long, 1.50 wide anteriorly and 1.45 wide posteriorly. Diameter of AME 0.46. Clypeal height 0.19, chelicera length 0.57. Abdomen 2.25 long, 1.63 wide. Length of leg segments: I 1.20 + 0.60 + 0.73 + 0.50 + 0.50 (3.53); II 1.20 + 0.63 + 0.65 + 0.61 + 0.40 (3.49); III 1.75 + 0.95 + 1.08 +1.30 + 0.55 (5.63); IV 1.58 + 0.65 + 1.04 + 1.35 + 0.55 (5.17). Leg formula III,IV,I,II. Leg spination: I: Fm d 0-1-1-3; Tb pr 1-2, v 1-1-2ap; Mt pr 1-1ap, rt 1 ap, v 2-2ap. II: Fm d 0-1-0-4; Pt pr 0-1-0; Tb pr 1-1, v 1-1-2ap; Mt pr 1-1ap, rt 1ap, v 2-2ap. III: Fm d 0-1-1-3; Pt pr and rt 0-1-0; Tb pr and rt 1-1-1, v 1-0-2; Mt d 1-1, pr and rt 1-0-2ap, v 0-1-2ap. IV: Fm d 0-1-1-4; Pt pr and rt 0-1-0; Tb d 1-0, pr and rt 1-1, v 1-0-2ap; Mt d and pr 1-1- 2ap, rt 0-1-2ap. Coloration (in alcohol; Figs 84–86 ). Carapace brown, eye field dark brown, almost black; thorax with black radial patches and a wide white marginal band; clypeus densely covered with white hairs. Sternum, endites and labium yellow, tinged with brownish. Chelicerae brownish yellow. Abdomen: dorsum brown, with a large shiny scutum occupying the anterior half and with a pair of white round spots on its rear third; sides brownish yellow, covered with white scales; venter yellow. Book-lung covers and spinnerets yellow, gently brownish tinged. Legs I and II brown, legs III and IV brown with yellow (semi-rings), coxae III and IV completely yellow. Palps yellow, tinged with brown. Palpal structure as in Figs 79–83 : VTA bulge-shaped; RTA short, hook-shaped, sharpened apically and directed anteriad; the cymbium with a visible cymbial ventral process (CLP); the tegulum small and elongated, with a finger-shaped tegular process (TP); the functional tegulum wide and elongated, with well-developed proximal (PP) and poorly-developed, obtuse distal (DP) projections; the embolus fingershaped, with a wide base that is fused with the apical edge of the functional tegulum.

Female

Unknown.

Distribution

The type locality only ( Fig. 509 ). Stenaelurillus brandbergensis ( Wesołowska, 2006) comb. nov. Figs 90–104 , 511

Mashonarus brandbergensis Wesołowska, 2006: 239 , figs 63–77 (D♂ ♀); the ♂ holotype in the State Museum of Namibia (Windhoek), not examined; the paratypes in MRAC, examined.

Diagnosis

By the conformation of the copulatory organs (the well-marked proximal projection of the functional tegulum, the stiletto-shaped embolus and the developed cymbial lateral projection, etc.), S. brandbergensis comb. nov. is most similar to S. guttatus comb. nov. and S. pseudoguttatus sp. nov. (cf. Figs 90–94 and 416–420 ). The males of S. brandbergensis comb. nov. differ in having the RTA visibly directed ventrad (distad in the related species) and the distal projection wide and obtuse (pointed in S. guttatus comb. nov., absent in S. pseudoguttatus sp. nov.). The females differ in having very short insemination ducts (long in S. guttatus comb. nov., not yet known in S. pseudoguttatus sp. nov.; Fig. 100 ). Besides, both sexes of S. brandbergensis comb. nov. can easily be distinguished from all species of Stenaelurillus , except for S. marusiki from Iran (see Logunov 2001b: fig. 30), by the presence of a pair of wide, longitudinal white stripes on the dorsum ( Figs 96 , 102 ).

Material examined

Paratypes

NAMIBIA: 2 ♂♂, 2 ♀♀, Brandberg, Hungarob Ravine, NE side, 21°13′ S, 14°31′ E, 1200 m a.s.l., 3–13 Nov. 1998, A. Kirk-Spriggs leg. ( MRAC 216.021).

Other material

NAMIBIA: 2 ♂♂, 1 ♀, Khomas Region, Windhoek, Us Pass Road, 22°33′39.2″ S, 17°03′56.9″ E, 13 Nov. 1974, S. Endrödy-Younga leg. ( TMSA 21541).

Remarks

We have been unable to borrow the holotype of this species, because it was impossible to post them to us from Namibia. Therefore, the present diagnosis and redescription are based on the paratypes of Mashonarus brandbergensis retained at the MRAC (216.021).

Description

Male (paratype)

Measurements: carapace: 2.15 long, 1.55 wide, 1.05 high. Abdomen: 2.15 long, 1.35 wide. Ocular area: 1.08 long, 1.28 wide anteriorly, 1.20 wide posteriorly. Cheliceral length 0.68. Clypeal height 0.13. Diameter of AME 0.38. Length of leg segments: I 1.30 + 0.65 + 0.88 + 0.73 + 0.48 (4.04); II 1.25 + 0.65 + 0.73 + 0.65 + 0.38 (3.66); III 1.53 + 0.78 + 0.93 + 1.15 + 0.45 (4.84); IV 1.35 + 0.63 + 0.95 + 1.25 + 0.50 (4.68). Leg formula III,IV,I,II. Leg spination: I: Fm d 0-1-1-4; Tb pr 1-1, v 1-1-2ap; Mt pr 1ap, v 2-2ap. II: Fm d 0-1-1-5; Tb pr 1-1, v 1-1-2ap; Mt pr 1-1ap, rt 1ap, v 2-2ap. III: Fm d 0-1-2-4; Pt pr and rt 0-1-0; Tb d 1-0-0, pr and rt 1-1-1, v 1-0-2ap; Mt d 0-1-0, pr and rt 1-0-2ap, v 0-2-2ap. IV: Fm d 0-1- 1-3; Pt pr and rt 0-1-0; Tb d 1-1-0, pr and rt 1-1-1, v 1-0-2ap; Mt pr 1-1-2ap, rt 2-1-2ap, v 0-1-1-2ap. Coloration (in alcohol; Figs 95–98 ). Carapace brown, with black eye field, densely covered with long brown recumbent scales; there are two white longitudinal stripes of scales; clypeus light brown, sparsely covered with long white hairs. Sternum yellowish brown, densely covered with white hairs. Labium and endites yellow, tinged with brown. Chelicerae yellow, tinged with brown. Abdomen: dorsum dark brown, with a pair of white spots at its anterior margin and a large V-shaped white figure on its rear half; sides and venter yellow. Book-lung covers yellow. Spinnerets brownish. Legs: coxae and trochanters I yellow, with brown anterior sides; coxae and trochanters II-IV yellow; Fm I dark brown anteriorly and yellow posteriorly, Pt and Tb I dark brown, Mt and Tr I brownish yellow; Fm II-IV yellow, with brown tips, the remaining segments of legs II-IV yellow, with brownish (semi)rings and patches. Palps brown, but its Pt and the tips of Tb dorsally densely covered with white scales. Palpal structure as in Figs 90–94 : VTA bulge-shaped; RTA straight, stiletto-shaped, directed antero-ventrad; the cymbium simple, with a poorly-marked cymbial lateral process; the tegulum small, poorly marked, without a tegular process; the functional tegulum narrow-elongated, with well-developed proximal (PP) and distal (DP) projections, both being wide and obtuse; the embolus stiletto-shaped, with a wide round base.

Female (paratype)

Measurements: carapace: 2.00 long, 1.45 wide, 0.85 high. Abdomen: 2.00 long, 1.40 wide. Ocular area: 0.95 long, 1.15 wide anteriorly, 1.13 wide posteriorly. Cheliceral length 0.50. Clypeal height 0.18. Diameter of AME 0.38. Length of leg segments: I 1.08 + 0.53 + 0.68 + 0.50 + 0.38 (3.17); II 1.03 + 0.55 + 0.60 + 0.50 + 0.30 (2.98); III 1.40 + 0.70 + 0.80 + 1.05 + 0.45 (4.40); IV 1.30 + 0.55 + 0.90 + 1.15 + 0.55 (4.45). Leg formula IV,III, I,II. Leg spination: I: Fm d 0-1-1-4; Tb pr 1-1, v 1-2-2ap; Mt v 2-2ap. II: Fm d 0-1-1-4; Tb pr 1-0, v 1-1-2ap; Mt pr 1-1ap, v 2-2ap. III: Fm d 0-1-2-4; Pt pr and rt 0-1-0; Tb d 1-0, pr and rt 1-1-1, v 1-0-2ap; Mt d 1-1-0, pr and rt 1-0-2ap, v 0-1-2ap. IV: Fm d 0-1-1-3; Pt pr and rt 0-1-0; Tb d 1-0-0, pr and rt 1-1-1, v 1-2ap; Mt d 1-0-0, pr and rt 1-1-2ap, v 1-1-2ap. Coloration (in alcohol; Figs 101–104 ) as in the male, but differs as follows: white stripes on the carapace wider and longer, dorsum of the abdomen with two subparallel white stripes (no white spots), and legs I are identical to others, yellow with brownish (semi)rings and patches. Epigyne and spermathecae as in Figs 99–100 : the

epigynal plate flat, with no visible structures; the copulatory openings small, poorly visible and widely separated; the insemination ducts very short, directed towards each other and forming bean-shaped structures with the primary spermathecae.

Distribution

A few close localities around the Brandberg massif in Namibia ( Fig. 511 ) ( Wesołowska 2006).

Figures

Figs 79–83. Male palp of Stenaelurillus belihuloya sp. nov., holotype. 79. Ventral view. 80. Retrolateral view. 81. Dorsal view. 82. Embolic division, dorsal view. 83. Embolic division, retrolateral view. Abbreviations: see Material and methods. Scale bars: 0.1 mm.

Figs 84–89. General appearance of the holotype of Stenaelurillus belihuloya sp. nov. (84–86) and a female of S. lesserti Reimoser, 1934 from Sri Lanka (Pollonaruwa) (87–89). Scale bars: 1 mm.

Figs 1–13. Trichobothrial bases (1–3, 5–8), tarsal organs (4, 9), left chelicerae (10–12) and right endite (13) of Stenaelurillus Simon, 1885. 1–2. S. nigricaudus Simon, 1886, ♀. 1. Tb 1. 2. Tr 1. 3. S. hirsutus Lessert, 1927, ♀, Tr 2. 4–7. S. termitophagus (Wesołowska & Cumming, 1999) comb. nov., ♀. 4. Tr 1. 5. Mt 1. 6. Tr 2. 7. Tr 1. 8–9. S. guttatus (Wesołowska & Cumming, 2002) comb. nov., ♀. 8. Tr 1. 9. Tr 1. 10. S. nigricaudus Simon, 1886, ♀. 11. S. termitophagus comb. nov., ♀. 12. S. darwini Wesołowska & Russell-Smith, 2000, ♀. 13. S. albopunctatus Caporiacco, 1949, ♂, right endite. Abbreviations: see Material and methods. Scale bars: 1–9 = 5 µm; 10–12 = 0.25 mm; 13 = 0.1 mm.

Fig. 509. Collecting localities of ten Asian species of Stenaelurillus Simon, 1885.

Figs 90–98. Stenaelurillus brandbergensis (Wesołowska, 2006), paratype, ♂ from Namibia (MRAC 216.021). 90. Palp, ventral view. 91. Palp, retrolateral view. 92. Embolic division, retrolateral view. 93. Embolic division, dorsal view. 94. Embolic division, median view. 95–98. General appearance. Abbreviations: see Material and methods. Scale bars: 90–94 = 0.1 mm; 95–98 = 1 mm.

Figs 99–104. Stenaelurillus brandbergensis (Wesołowska, 2006), paratype, ♀ from Namibia (MRAC 216.021). 99. Epigyne, ventral view. 100. Spermathecae, dorsal view. 101–104. General appearance. Scale bars: 99–100 = 0.1 mm; 101–104 = 1 mm.

Figs 413–416. Stenaelurillus pilosus Wesołowska & Russell-Smith, 2011, holotype, ♂, general appearance. Scale bars: 1 mm.

Figs 417–425. Stenaelurillus pseudoguttatus sp. nov., paratype, ♂, of Mashonarus guttatus Wesołowska & Cumming, 2002; MRAC 152.151). 417. Male palp, ventral view. 418. Male palp, retrolateral view. 419–421. Embolic division. 419. Retrolateral view. 420. Dorsal view. 421. Median view. 422–425. General appearance. Scale bars: 417–421 = 0.1 mm; 422–425 = 1 mm.

Fig. 511. Collecting localities of six African species of Stenaelurillus Simon, 1885.