Lepthercus engelbrechti, Ríos-Tamayo & Lyle, 2020

Ríos-Tamayo, Duniesky & Lyle, Robin, 2020, The South African genus Lepthercus Purcell, 1902 (Araneae: Mygalomorphae) phylogeny and taxonomy, Zootaxa 4766 (2), pp. 261-305: 288-291

publication ID

http://doi.org/ 10.11646/zootaxa.4766.2.2

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:BA570D47-FE77-446C-B000-9208C9A6E957

DOI

http://doi.org/10.5281/zenodo.3803486

persistent identifier

http://treatment.plazi.org/id/03F11B20-FFC5-FF96-8EE8-3B1BFBDDD5D2

treatment provided by

Carolina

scientific name

Lepthercus engelbrechti
status

sp. nov.

Lepthercus engelbrechti   sp. nov.

( Figs. 2H, I View FIGURE , 16A, B View FIGURE , 17 View FIGURE A–K, 18A–C, 24) http://zoobank.org/ urn:lsid:zoobank.org:act:5CC73DE1-28E2-4FA2-9784-BA1C58B0F910

Material examined. Type material: Holotype ♂. SOUTH AFRICA: Western Cape Province, Swellendam District ; ca. 3km W of Bonnievale; S slope of hill on S side of tar road (33°55’19.70”S 20°4’3.90”E), 19.v.2013, Engelbrecht, I., Correia, M. leg., ( NCA 2018 /384) GoogleMaps   . – Paratype. SOUTH AFRICA: same data as holotype, 1 ♀ ( NCA 2018/385).

Other material examined: SOUTH AFRICA: Western Cape Province: Swellendam, Bontebok N.P (34°04′S 20°27′E), 27.x.1987, Entomology Staff leg., 1 ♂ ♀ ( NMBA 17794 View Materials ); Swellendam District   GoogleMaps ; ca. 3km W of Bonnievale; S slope of hill on S side of tar road (33°55’19.70”S 20°4’3.90”E), 19.v.2013, Engelbrecht, I. leg., 3 ♂♂, 7 ♀♀ ( NCA 2018 /383).

Etymology. The specific epithet is a patronymic in honor of Dr Ian Engelbrecht who collected the type specimens and for his contribution to arachnology in South Africa.

Diagnosis. Males of L. engelbrechti   sp. nov., can be recognized from all other species in “Group haddadi), by the presence of a curved megaspine with the apex flattened laterally ( Fig. 17I, J View FIGURE ); the presence of one prolateral strong and curved spine, near the spur ( Fig. 17I, J View FIGURE ) and by the presence of a shorter copulatory bulb ( Fig. 17 View FIGURE F–H). Females can be distinguished from L. haddadi   sp. nov., by the shape of their spermathecae with a short stalk ( Fig. 18D View FIGURE ).

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Description. Male holotype (NCA 2018/384, Figs. 17 View FIGURE A–J). Total length 12.38. Carapace ( Fig. 17A View FIGURE ): length 5.52, width 4.05, with lateral dark marginal bristles, with a little pubescence. Cephalic region: length 3.29; clypeus almost absent, without bristles on the edge, 4 bristles in front of the OQ and 5 between the PME. Fovea: width 0.39, short, slightly recurved. Ocular measurements: AME 0.14, ALE 0.24, PME 0.18, PLE 0.22, OQ length 0.45, 0.75 width; AME–ALE 0.04, PME–PLE 0.00, AME–PME 0.05, ALE–PLE 0.03, AME–AME 0.09, OMP–OMP 0.29. Chelicerae: length 2.35, width 1.36, with dark dorsal–anterior bristles, intercheliceral tumescence small, wellmarked with setae ( Fig. 17C View FIGURE ). Fang groove with 8 promarginal teeth and 18 mesobasal denticles. Labium: length 0.41, width 0.72. Maxillae: length 1.64, width 0.71, with about 71 short cuspules on inner corner, prolateral face slightly curved, soft area small, with long uniformly distributed hairs, serrula present ( Fig. 2I View FIGURE ). Sternum ( Fig. 17B View FIGURE ): length 2.66, maximum width 2.05. Abdomen: length 5.28, covered with small dark hair and bristles. PMS: length 0.54; PLS: length of basal:medial:apical segments 1.02:0.63:1.23; total length 2.88. Lengths of legs and palp: I: 3.47, 2.18, 2.66 (width/length: 0.53), 2.42, 1.60, 12.33. II: 3.40, 2.06, 2.25, 2.17, 1.48, 11.36. III: 3.08, 1.79, 1.88, 2.66, 1.47, 10.88. IV: 3.88, 2.19, 2.71, 3.51, 1.68, 13.97. Palp: 1.76, 1.01, 1.41, —, 0.80, 4.98.

Chaetotaxy: Leg I: femur, 1-1-1-1 d (centrals), 1 PA; patella, 1 PA; tibia, 1-1 P, 2-3-1 V, a small spur, with an apical megaspine with the apex flattened laterally. Presence of a strong curved spine near of the base of the megaspine and with another prolateral strong curved spine, near the spur ( Fig. 17I, J View FIGURE ); metatarsus, 1-1-2 V, presence of numerous black blunt spinules (1:3A, Fig. 17I View FIGURE ); tarsus, 0. Leg II: femur, 1-1-1-1 d, 1-1 PA; patella, 1 PA; tibia, 1-1 P, 2-2-3 V; metatarsus, 1-1-1 P, 2-3-2 V; tarsus, 0. Leg III: femur, 1-1-1-1 d, 1-1 PA; patella, 1-1 P, 1 R; tibia, 1-1 P, 1-1 D, 1-1 R, 2-2-3 V; metatarsus, 1-1-1 P, 1-1-1 D-P, 1-1-1-1 D-R, 2-3-1-3 V; tarsus, 0. Leg IV: femur, 1-1-1-1 d, 1-1 RA; patella, 1 R; tibia, 1-1 R, 2-2-2 V; metatarsus, 2-1-1-1 P, 1-1-1 D-P, 1-1-0-1 D-R, 1-1 R, 2-3-3 V; tarsus, 0. Palp ( Fig. 17D, E View FIGURE ): femur, 1-1-1 d (1:2A), 1 PA; patella, 1 pa; tibia, 1 P, (width/length: 0.80); tarsus, 0.

Scopulae: Metatarsi: I, sparse, around the black blunt spinules; II, sparse (3–4 A), more abundant in the anterior part, with some long and fine setae; III, sparse (A); IV, absent. Tarsi: I–II, dense, uniformly distributed throughout the segment; III, sparse, uniformly distributed and divided by a narrow band of setae; IV, sparse, uniformly distributed and divided by a wide band of setae. Trichobothria: Tibiae: I 11-11; II 10-10; III 9-9; IV 11-11. Metatarsi: I (3)1(2)1(4)1; II (5)1(2)1(3)1; III (4)1(2)1(5)1; IV (6)1(2)1(3)1(6)1. Tarsi: I 13; II 12; III-IV 13. Preening combs: metatarsus: II, 3 PV; III, 3 PV–2 RV; IV, 2 PV–3 RV. Copulatory bulb: with a curved embolus tapering gradually ( Fig. 17 View FIGURE F–H), spermatic duct slightly curved. Color: Overall brown-reddish (Mt-T I darker). Abdomen mottled with light spots forming wide bands; spinnerets light yellow with ventral dark longitudinal bands.

Female paratype (NCA 2018/385, Figs. 18 View FIGURE A–D). Total length 12.85. Carapace ( Fig. 18A View FIGURE ): length 4.88, width 3.62. Cephalic region: length 3.20, clypeus small (almost absent) with 5 marginal bristles; 7 bristles in front of the OQ and numerous small ones between the PME. Fovea: width 0.34, almost straight (slightly procurved). Ocular measurements: AME 0.13, ALE 0.28, PME 0.19, PLE 0.25, OQ length 0.45, width 0.80; AME–ALE 0.06, PME– PLE 0.00, AME–PME 0.06, ALE–PLE 0.03, AME–AME 0.12, PME–PME 0.30. Chelicerae ( Fig. 18C View FIGURE ): length 2.64, width 1.71; with dorsal-retrolateral dark bristles. Fang groove with 8 promarginal teeth (one small between 7th and 8th) and 15 mesobasal denticles. Labium: length 0.40, width 0.81. Maxillae: length 1.71, width 0.75, with 75 cuspules on inner corner, prolateral face curved, soft area long, with long uniformly distributed hairs, serrula present on anterior inner corner ( Fig. 2H View FIGURE ). Sternum ( Fig. 18B View FIGURE ): length 2.36, maximum width 1.99. Abdomen: length 5.60, with small bristles in the dorsum. PMS: length 0.64; PLS: length of basal:medial:apical segments 1.00:0.58:1.00; total length 2.58. Lengths of legs and palp: I: 3.24, 2.06, 2.06, 1.48, 1.03, 9.87. II: 2.82, 1.79, 1.68, 1,43, 1.06, 8.78. III: 2.05, 1.44, 1.36, 1.92, 1.15, 7.92. IV: 3.31, 1.98, 2.19, 2.76, 1.31, 11.55. Palp: 2.21, 1.36, 1.29, —, 1.31, 6.17.

Chaetotaxy: Leg I: femur, 0; patella, 0; tibia, 1-2 vant; metatarsus, 2-1-2 V; tarsus, 0. Leg II: femur, 1 pa; patella, 1 pa; tibia, 1 P, 1-2 vant; metatarsus, 2-2-3 V; tarsus, 0. Leg III: femur, 1-1-1 d, 1-1 ra; patella, 1-1 P, 1 R; tibia, 1-1 P, 1-1 D, 1 R, 2-2-3 V; metatarsus, 2-1-1 P, 1-1-1 D-P, 1-1-1-1 D-R, 2-3-3 V; tarsus, 0. Leg IV: femur, 1-1-1-1 d, 1 ra; patella, 1 R; tibia, 1-1 R, 2-2-2 V; metatarsus, 1-1-1 P, 1-1-1 D-P, 1-1-1-0-1 D-R, 1 R (1:3A), 2-3-3 V; tarsus, 0. Palp: femur, 1-1-1-1 d (1:2A), 1 pa; patella, 0; tibia, 1-3 V; tarsus, 0.

Scopulae: Metatarsi: I, dense, uniformly distributed, divided by setae; II–IV, without scopula. Tarsi: I, dense, uniformly distributed, divided by setae; II dense, uniformly distributed, divided by a narrow band of setae; III–IV, sparse, uniformly distributed and divided by a wide band of setae. Trichobothria: Tibiae: palp 8-7; I 9-9; II 9-10; III 9-8; IV 10-10. Metatarsi: I (3)1(2)1(4)1; II (4)1(2)1(4)1; III (4)1(2)1(5)1; IV (4)1(1)1(2)1(6)1. Tarsi: palp 11; I 12; II 11; III 12; IV 11. Preening combs: metatarsus: II 3 PV; III 3 PV–3 RV; IV 2 PV–3 RV. Spermathecae: small, tubulars and curved ( Fig. 18D View FIGURE ). Color: Overall orange-yellowish (chelicerae darker). Abdomen mottled with light spots forming wide bands, spinnerets light yellow with dark, longitudinal bands ventrally.

Distribution. Eastern and Western Cape Provinces, South Africa ( Fig. 24 View FIGURE ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Nemesiidae

Genus

Lepthercus