Research Article |
Corresponding author: Shuqiang Li ( lisq@ioz.ac.cn ) Academic editor: Bernhard A. Huber
© 2021 Dancun A. Oketch, Esther N. Kioko, Shuqiang Li.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Oketch DA, Kioko EN, Li S (2021) Three new species of the genus Toxoniella (Araneae, Liocranidae) from Mount Kenya National Park, Kenya. African Invertebrates 62(1): 273-286. https://doi.org/10.3897/AfrInvertebr.62.62963
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Three new species of the genus Toxoniella Warui & Jocqué, 2002 of the family Liocranidae Simon, 1897 are described from Kenya: T. tharaka Oketch & Li, sp. nov., T. waruii Oketch & Li, sp. nov., and T. nyeri Oketch & Li, sp. nov. Types are deposited in the National Museums of Kenya (
Epigyne, shady forest, spider, taxonomy
Spiders of the family Liocranidae Simon, 1897 are small to medium-sized (3–8 mm long) and live freely in diverse habitats such as heathland, dry and rocky areas, and sometimes in loose leaf litter or woody debris in shady forests (
Toxoniella was first described in the family Gallieniellidae Millot, 1947 before being transferred to Liocranidae by
All specimens were preserved in 95% alcohol and examined and measured using an ocular calibrated scale bar in a Leica M205C stereomicroscope. Images were captured using an Olympus C7070 wide zoom digital camera mounted on an Olympus SZX12 dissecting microscope or an Olympus BX51 compound microscope. Male and female copulatory organs were removed, cleared in lactic acid, and washed in alcohol for a few minutes. They were then temporarily mounted on glass slides and photographed. Digital images were prepared using Helicon Focus version 6.10 image stacking software and subsequently edited in Adobe Photoshop CC 2020.
Leg lengths are given in the following sequence: femur, patella, tibia, metatarsus, tarsus. Measurements are given in millimeters. Elevation is presented in meters above sea level. Types are deposited in the National Museums of Kenya (
Abbreviations:
AER anterior eye row;
ALE anterior lateral eye;
AME anterior median eye;
AW anterior width;
ATE anterior tegular extension;
d dorsal;
F femur;
MOQ median ocular quadrangle;
Mt metatarsus;
P patella;
PER posterior eye row;
pl prolateral;
PLE posterior lateral eye;
PME posterior median eye;
PTE posterior tegular extension;
PW posterior width;
rl retrolateral;
RTA retrolateral tibial apophysis;
SP spermatheca;
T tibia;
v ventral.
Toxoniella taitensis Warui & Jocqué, 2002 (by original designation).
Holotype Kenya • ♂; Tharaka Nithi County, Chogoria Town, Mount Kenya National Park, Chogoria Forest (bamboo vegetation); 00.1896°S, 37.4717°E; 2601 m; 20 August 2018; Oketch A.D. & Kioko G. leg. Paratypes Kenya • 4 ♂, 3 ♀; same data as holotype.
Kenya • 1 ♂, 4 ♀; Nakuru County, Lake Nakuru National Park, Nganyoi KWS Camp; 00.4903°S, 036.1858°E; 1856 m; 11 August 2018; Kioko G. & Joshua S. leg.
Males of Toxoniella tharaka sp. nov. resemble T. taitensis and T. rogoae in general appearance but differ from both by having a short, blunt, slightly slanted RTA and a claw-like embolus. The epigyne resembles that of T. rogoae by having short cul de sacs but differs by having anteriorly directed cul de sacs (laterally directed in T. rogoae) and a wider epigynal groove (closed medially in T. rogoae). Additionally, the new species has a medially invaginated anterior epigynal margin instead of a smoothly recurved epigynal margin found in both T. taitensis and T. rogoae (Fig.
Male. Total length 4.59. Carapace 2.60 long, 1.73 wide, yellowish brown with lines of grey setae radiating from fovea. Fovea thin, dark brown, longitudinal. Clypeus about two times the diameter of AME. All eyes have a dark ring around each of them. Eye diameters and interdistances: AME: 0.16, ALE: 0.12, PME: 0.10 and PLE: 0.12, AME–AME: 0.04, AME–ALE: 0.03, MOQ: AW: 0.15, PW: 0.18, Length: 0.18. Chelicerae elongated, brown, reddish orange in some areas. Sternum longer than wide, heart shaped, brown with conspicuous pre-coxal triangles and sparse setae. Labium longer than wide and colored as sternum. Endites longer than wide, about twice the length of labrum. Dorsally, abdomen with grey setae, reddish anteriorly, two pairs of brown sigilla and small brown dots fading towards spinnerets. Venter pale yellowish brown with mottling. Leg measurements: I 7.04 (1.90, 0.85, 1.82, 1.37, 1.10), II 6.06 (1.60, 1.00, 1.40, 1.16, 0.90), III 4.20 (0.68, 0.60, 1.12, 1.10, 0.70), IV 7.14 (1.90, 1.00, 1.50, 1.70, 1.04). Tibiae, metatarsi, and tarsi of anterior leg pairs have long, curved setae (trichobothria) dorsally that increase in length distally. The tarsi bases have 5–6 pairs of slender tenant setae. Leg spination I: P–T v1–2–2 Mt v2–2–1; II: P–T v1–1–2 Mt v2–2; III: F P–T pl2, d2, rl2, v2–2–1 Mt 11; IV: F pl1, d1, rl1 P v1 T pl2, d1, rl2, v2–2–2. Palp as in Fig.
Female coloration as in male, with abdomen slightly darker. General body appearance as in Fig.
The species is named after type locality; noun in apposition.
Only known from Kenya.
Holotype Kenya • ♂; Nyeri County, Naro Moru Town, Mount Kenya National Park, Naro Moru Gate; 00.1742°S, 37.1162°E; 2465 m; 26 Jul. 2017; Zhao Q. & Kioko G. leg. Paratypes Kenya • 2 ♂, 3 ♀; same data as holotype.
Males of Toxoniella waruii sp. nov. resemble T. taitensis and T. rogoae by having a ridge-like RTA but can be distinguished from T. taitensis by an apically pointed, posterior tegular extension well-separated from the anterior tegular extension and a bent embolus with a membranous sclerite and from T. rogoae by having a flat, distally pointed median apophysis (Fig.
Male. Total length 7.20. Carapace 3.40 long, 2.52 wide, brownish orange, narrow at pars cephalica. Setae sparse, grey laterally with grey radiations from fovea. Cephalic area lacks pattern. Clypeus short, chelicerae, endites, and labium colored as carapace. Eye diameters and interdistances: AME 0.16, ALE 0.13, PME 0.09 and PLE: 0.11, AME–AME: 0.04, AME–ALE: 0.03, PME–PME: 0.07, PME–PLE: 0.07, MOQ: AW: 0.13, PW: 0.18, Length: 0.16. Sternum longer than wide, heart shaped, colored as carapace, with strongly pointed post-coxal triangles. Abdomen with dense, grey setae, reddish brown near carapace. Venter pale yellow with two pairs of intermittent lines from epiandrum towards spinnerets. Leg measurements: I 6.57 (1.76, 0.82, 1.58, 1.24, 1.17), II 5.08 (1.30, 0.79, 1.20, 0.90, 0.89), III 4.96 (1.30, 0.60, 0.91, 1.13, 1.02), IV 7.59 (1.80, 0.95, 1.64, 1.86, 1.34). Anterior leg pairs have long curved setae, three on tarsus are longer. Tenent setae in 5–6 pairs. Leg spination I P–T v1–2–2 Mt v2–2–2; II: P–T v0–1–2 Mt v2–2; III: F P–T pl2, d2, rl2, v2–2–1 Mt 8; IV: P v1 T pl2, d1, rl2, v2–2–2. Palp (Fig.
Female. Similar to male in coloration except darker and larger. Total length 7.20. Carapace 3.40 long, 2.20 wide. Eye diameters and interdistances: AME 0.17, ALE 0.13, PME 0.10 and PLE: 0.11, AME–AME: 0.04, AME–ALE: 0.03, PME–PME: 0.07, PME–PLE: 0.07, MOQ: AW: 0.13, PW: 0.18, Length: 0.16. Leg measurements: I 6.61 (1.78, 0.82, 1.58, 1.23, 1.20), II 5.06 (1.30, 0.80, 1.20, 0.90, 0.86), III 4.97 (1.29, 0.60, 0.93, 1.14, 1.01), IV 7.63 (1.80, 0.98, 1.64, 1.87, 1.34). Tenent setae pairs and leg spination as in males. Abdomen grey, wider than in males. Epigyne (Fig.
The species name is dedicated to Dr Charles Warui, a Kenyan ecologist who established and described the genus and two species; noun (name) in genitive case.
Holotype Kenya • ♂; Nyeri County, Naro Moru Town, Mount Kenya National Park, Naro Moru Gate, Metrological station; 00.1702°S, 37.214°E; 3000 m; 6 Aug. 2018; Kioko G. & Oketch A.D. leg. Paratypes Kenya • 1 ♂, 3 ♀; same data as holotype.
Diagnosis. Males of Toxoniella nyeri sp. nov. can be distinguished from other congeners by the talon-like RTA, the large, pointed embolus, and the apically membranous median apophysis (Fig.
Male. Total length 6.83. Carapace 3.20 long, 2.34 wide, orangish brown with dark net-like pattern; with two dark lines towards either of the posterior median eyes. Fovea dark brown. Clypeus vertical and short, yellowish brown, as are chelicerae. Eye diameters and interdistances AME: 0.15, ALE: 0.12, PME: 0.13, PLE: 0.13, AME–AME: 0.05, AME–ALE: 0.04, PME–PME: 0.12, PME–PLE: 0.11, MOQ: AW: 0.26, PW: 0.34, Length: 0.27. All eyes have dark pigment around them. Sternum pale yellow, heart shaped, longer than wide. Pre-coxal triangle weakly pointed. Labium longer than wide, approximately twice the length of endites. Abdomen dorsally grey with thick, short setae. Venter greyish. Leg measurements: I 6.42 (1.70, 0.73, 1.59, 1.20, 1.20), II 5.10 (1.30, 0.75, 1.27, 0.87, 0.91), III 4.97 (1.32, 0.66, 0.90, 1.10, 0.99), IV 7.49 (1.76, 0.91, 1.64, 1.81, 1.37). Anterior leg pairs have long, curved setae. Tenent setae in 5–6 pairs. Leg spination; most of the spines have been detached; III: P–T pl2, d2, rl2, v2–2–2 Mt 10; IV: P v1 T pl2, d1, rl2, v2–2–2. Palp (Fig.
Female. Slightly larger and darker than male. Total length 6.90. Carapace length 3.41, width 2.59, color and pattern as in male. Eye diameters and interdistances AME: 0.15, ALE: 0.12, PME: 0.13, PLE: 0.12, AME–AME: 0.05, AME–ALE: 0.04, PME–PME: 0.13, PME–PLE: 0.12, MOQ: AW: 0.26, PW: 0.34, Length: 0.27. Sternum pale brown. Pre-coxal triangles as in male. Leg measurements: I 6.36 (1.70, 0.71, 1.59, 1.20, 1.16), II 5.10 (1.30, 0.75, 1.27, 0.87, 0.91), III 4.98 (1.32, 0.66, 0.90, 1.10, 1.00), IV 7.46 (1.74, 0.91, 1.64, 1.80, 1.37). Tarsal tenent setae as in males. Leg spination III: P–T pl2, d1, rl2, v2–2–2 Mt 11; IV: P v1 T pl2, d1, rl2, v2–2–2. Epigyne (Fig.
The species is named after type locality; noun in apposition.
Known only from the type locality.
The manuscript benefitted greatly from comments by Bernhard A. Huber, Jan Bosselaers and an anonymous referee. Sarah Crews checked the English. Sergei Zonstein, Grace Kioko, and Charles Warui provided constructive comments. Sese Joshua and the Invertebrate Zoology Section team at the National Museums of Kenya helped in field collections. The study was financially supported by the National Natural Science Foundation of China to Shuqiang Li (NSFC-31530067).