Sahastata nigra ( Simon, 1897 )

Magalhaes, Ivan L. F., Stockmann, Mark, Marusik, Yuri M. & Zonstein, Sergei L., 2020, On Sahastata (Araneae: Filistatidae): complementary description of the generotype and two new species from Oman and Morocco, Zootaxa 4899 (1), pp. 215-246 : 222-228

publication ID

https://doi.org/ 10.11646/zootaxa.4899.1.12

publication LSID

lsid:zoobank.org:pub:AEB66CC3-5BE4-47F6-9075-CD3BFA3ED832

DOI

https://doi.org/10.5281/zenodo.4450709

persistent identifier

https://treatment.plazi.org/id/5A0D8780-DA4B-BC15-33AD-7EE259C0F9D6

treatment provided by

Plazi

scientific name

Sahastata nigra ( Simon, 1897 )
status

 

Sahastata nigra ( Simon, 1897) View in CoL

Figures 1 View FIGURE 1 A–B, 5–12, 24A–B

Filistata nigra Simon, 1897: 97 (Lectotype ♀ [MHNH AR 14851 ], here designated, and 4♀ paralectotypes [MNHN AR 5476 View Materials ], here designated, originally in the same vial: OMAN: Muscat, X.1896, leg. M. Maindron—examined).

Sahastata nigra Benoit, 1968: 97 View in CoL , figs 1–5 (misidentified ♀, figures refer to a species near S. wunderlichi View in CoL sp. nov.; material examined may refer in part to S. wunderlichi View in CoL sp. nov., in part to S. infuscata View in CoL , and in part to undescribed species); Marusik et al. 2017: 310, figs 2, 5, 10.

Remarks. Additional specimens from the same vial as the syntypes apparently were set apart by P. Lehtinen and are currently housed in the University of Turku, Finland. Simon’s (1897) original description reported additional specimens from Egypt but these are not in the MNHN and are currently untraceable; it is unlikely these are conspecific with the specimens from Oman. Due to the nature of the original description, citing specimens from different localities, we here designate one of the syntypes as a lectotype to preserve the stability of the name.

The records by Berland (1922) from Ethiopia are most certainly misidentified; we could not re-examine the specimens, but they come from areas near the distribution of S. infuscata . Benoit (1968) misidentified the type species upon the description of the genus, and most, if not all, of those specimens he studied belong to species other than S. nigra . This is not problematic regarding the identity of Sahastata , because all of the material examined by him is congeneric with S. nigra .

Diagnosis. Males differ from other Sahastata species by having longitudinal ridges and ribs in the subdistal part of the embolus, and in the shape of the apical keel; the bulb has a dorsal dent in lateral view, and the embolus is shorter and more straight ( Fig. 7 View FIGURE 7 ) than in the related S. wesolowskae sp. nov. ( Fig. 14 View FIGURE 14 ). Females possess compact mushroom-like spermathecae, which are smaller and broader-spaced than in other female congeners; the membranous portion is short and lobe-shaped, and the glandular portion is subtriangular ( Fig. 11 View FIGURE 11 ).

Description. Male (MACN-Ar 39464). Coloration yellowish cream, except where noted. Legs yellowish brown, becoming gradually dark towards apex. Abdomen grayish, light brown with whitish cardiac area.

Total length 6.38. Carapace 2.61 long, 2.00 wide. Clypeus 0.27 long. Eye sizes and interdistances: AME 0.148, PME 0.15, ALE 0.25, PLE 0.21, AME-AME 0.05, PME-PME 0.14. Sternum 1.56 long, 1.17 wide. Palp: femur length 5.94, height 0.29, tibia length 5.83, height 0.29. Leg I: femur (fe) 6.46, patella (pa) 1.07, tibia (ti) 6.64, metatarsus (mt) 5.84, tarsus (ta) 2.95. II: fe 5.16, pa 0.97, ti 4.59, mt 4.55, ta 2.26. III: fe 4.26, pa 0.9, ti 3.6, mt 3.98, ta 1.92. IV: fe 5.35, pa 1, ti 5.17, mt 5.24, ta 2.37. Abdomen: length 3.78, width 1.61.

Palp macrosetae: ~15v long, ~2d short. Leg macrosetae: fe I d1, dp8, v20, r19; ti I v2-2-2-2-2; mt I p0-1-1-2, r0-0-1-2, v2-2-2-2-2-2; ta I v12; fe II d2, dp5; ti II v2-2-2; mt II p0-1-1-1, r0-0-1, dr0-0-1, v2-2-2-2-2; ta II v15; fe III d4, dp3; ti III vp0-1-1; mt III p1-1-1, r1-0-1, dr0-0-1, v2-2-2-2-2; ta III v12; fe IV d5, dp1; mt IV p0-1-2, r0-0-1, v1-1-2-2-2; ta IV v17.

Palp ( Figs 7–8 View FIGURE 7 View FIGURE 8 ): femur more than two times longer than carapace, cymbium about as long as bulb, bulb subtriangular, with a slight constriction on medial area, sperm duct with 3 coils, embolus spiniform, short, only slightly curved, with small keel, tibia slightly sinuous.

State of the specimen: good, left palp dissected, both legs IV disarticulated from tibia.

Female (MACN-Ar 38868). Carapace brown, stippled with dark brown and with dark brown V-shaped median pattern. Labium, endites and sternum dark brown. Sternum and legs I–II hirsute, with long setae. Legs dark brown, with longitudinal brown stripes, gradually becoming yellow brown on the tips. Abdomen grayish, light brown.

Total length 15.0. Carapace 5.25 long, 3.97 wide. Clypeus 0.89 long. Eye sizes and interdistances: AME 0.18, PME 0.197, ALE 0.33, PLE 0.22, AME-AME 0.098, PME-PME 0.29. Sternum length 2.96, width 2.27. Palp: femur length 2.87, height 0.96, tibia length 1.7, height 0.88. Leg I: fe 6.42, pa 1.91, ti 5.91, mt 5.34, ta 2.97. II: fe 4.72, pa 1.81, ti 3.94, mt 3.68, ta 2.18. III: fe 3.72, pa 1.71, ti 2.8, mt 3, ta 1.58. IV: fe 5.32, pa 1.77, ti 4.66, mt 4.17, ta 2.04. Abdomen: length 9.97, width 7.86.

Palp macrosetae on ventral surface of tibia and tarsus. Leg macrosetae: ti I v2-2-1; mt I p0-0-1, r0-0-1, v2-2-2- 2-2; ta I v10; ti II v2-2-2-1; mt II p1-1-1, r0-0-1, v2-2-2-2-2-2; ta II v6; ti III vp1-1-0; mt III p1-1-2, r1-1-1, v2-2-2- 2-2; ta III v9; fe IV d2-0-0; ti IV v1-0-0; mt IV p0-0-1, r0-1-0, dr-0-0-1, v2-2-2-2; ta IV v8. Calamistrum with 3 rows of tightly packed and neatly arranged setae, rows with ~30-30-10 setae, the retrolateral one very reduced.

Endogyne ( Fig. 11 View FIGURE 11 ). Spermathecae with short, lobe-like membranous portion (MPS) embraced by short, subtriangular glandular portion (GPS).

State of specimen: good, left leg II disarticulated from tibia, right legs II–III set apart for molecular work, genitalia dissected.

Variation. Males (n = 2): total length 6.38–6.57 (6.48), carapace length 2.61–3.19 (2.9), femur I length 6.46– 7.34 (6.9), femur/carapace ratio 2.30–2.48 (2.39), palpal femur length 5.94–6.52 (6.23), palpal femur/carapace ratio 2.04–2.28 (2.16). Females (n = 3): total length 12.5–15.0 (13.57), carapace length 4.57–5.25 (4.83), femur I length 4.99–6.42 (5.5), femur/carapace ratio 1.07–1.22 (1.14).

Other material examined. OMAN: Ad Dakhiliyah: Al Hamra, Jebel Shams mountain range south of Muscat, dry rocky shrubland/grassland, in cracks in stones (23.23614°N, 57.19378°E), leg. M. Stockmann, IX.2016, 5 imm. (MACN-Ar 38371), 1³ 1♀ (MACN-Ar 41196), 1♀ (MACN-Ar 41201), 1³ (MACN-Ar 39464); GoogleMaps Samail , dry rocky shrubland/grassland, under large stones (23.17041°N, 58.0996°E), leg. M. Stockmann, IX.2016, 1♀ (MACN-Ar 38368), 1³ 1♀ ( SMNH), 1³ ( SMF), 1³ 1♀ ( SMNH) GoogleMaps . Al Buraymi: Mahdha , 24.77502°N, 55.91458°E, leg. M. Stockmann, IX.2016, 1♀ (MACN-Ar 41199), 3♀ (MACN-Ar 41202), 1³ ( SMNH), 1³ ( SMF) GoogleMaps . Muscat: Quriyat , 22.83148°N, 59.02858°E, leg. M. Stockmann, IX.2016, 1♀ (MACN-Ar 39467) GoogleMaps . UNITED ARAB EMIRATES: Fujairah: Al Ayn, Jebel Hafeet , 24.06778°N, 55.75083°E, leg. S. Huber & L. Monod, 20. V GoogleMaps .2015, 2♀ ( SMF); Khor Kalba II National Park , 24.9925°N, 56.33083°E, 25 m a.s.l., leg. S. Huber & L. Monod, 18. V GoogleMaps .2015, 1♀ 2 imm. ( SMF); N of Khor Fakkan , coastal road in plain with Acacia trees, 25.48861°N, 56.35778°E, 30 m leg. S. Huber & L. Monod, 14. V GoogleMaps .2015, 2♀ ( SMF) .

Distribution. Known from northern Oman and United Arab Emirates ( Fig. 3 View FIGURE 3 ).

Natural history. Females were collected in autumn in a wadi (a dry valley where water runs during torrential rain) in the Jebel Shams mountain range. The area has loamy and rocky soil, and steady vegetation with trees, shrubs and other plants, and rocks and stones. Specimens were taken from webs in cracks of rocks, or, more commonly, in webs under large rocks in the shade of trees. One specimen had an egg sac.

SMNH

Department of Paleozoology, Swedish Museum of Natural History

SMF

Forschungsinstitut und Natur-Museum Senckenberg

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Filistatidae

Genus

Sahastata

Loc

Sahastata nigra ( Simon, 1897 )

Magalhaes, Ivan L. F., Stockmann, Mark, Marusik, Yuri M. & Zonstein, Sergei L. 2020
2020
Loc

Sahastata nigra Benoit, 1968: 97

Marusik, Y. M. & Koponen, S. & Zonstein, S. 2017: 310
Benoit, P. L. G. 1968: 97
1968
Loc

Filistata nigra

Simon, E. 1897: 97
1897
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