Oedothorax nazareti Scharff 1989, INCERTAE SEDIS
Creators: name: Lin, Shou-Wang
name: Lopardo, Lara
name: Uhl, Gabriele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Oedothorax
Oedothorax nazareti

description: ‘OEDOTHORAX’ NAZARETI SCHARFF, 1989 INCERTAE SEDIS; NEW FEMALE DESCRIPTION
(FIGS 7I, 67J, 68J, 78)
Oedothorax nazareti Scharff, 1989: 15, figs 7–12 (Dm).
Oedothorax nazareti Tanasevitch, 2015: 382, fig. 7 (m).
Type material: Holotype: Ethiopia: Shoa Administrative Province, Nazaret, under stone in cultivated farmland, 2400 m, ♂ 22.vi.1985, leg. N, Scharff (not examined).
Examined material: Ethiopia, c. 15 km west of Debre Siwa, under stones in overgazed woodland, 3♂ 10♀ 11.vi.1988, det. A. Russell-Smith (RMCA 224.501).
Diagnosis:
Males: This species can be identified by its unique conical-shaped postocular hump and setae distribution on the hump and interocular region.
Females: This species has the typical simple epigyne structures as many other Oedothorax species, but can be identified by the trajectory of the copulatory ducts (Fig. 78F).
Description:
Male (RMCA 224.501): Total length: 2.29. Prosoma: 1.06 long, 0.74 wide, postocular region conically elevated, covered by long, thick setae; interocular region with dense setae (Fig. 7I). Eyes: AME-AME: 0.04, AME width: 0.05, AME-ALE: 0.05, ALE width: 0.08, ALE- PLE: 0, PLE width: 0.08, PLE-PME: 0.04, PME width: 0.06, PME-PME: 0.19. Clypeus: not hirsute, one sub- AME seta. Sternum: 0.63 long, 0.56 wide. Chelicerae: mastidia absent; stridulatory striae scaly, rows widely and evenly spaced (Fig. 67J). Legs: dorsal proximal macroseta on tibia I, II, III and IV 0.12, 0.13, 0.91 and 1.46 times diameter of tibia, respectively; Tm I: 0.67. All metatarsi with trichobothrium. Pedipalp: patella prolateral proximal vertical macrosetae absent; tibia with one prolateral, two retrolateral trichobothria; TPS small, ventrally situated at TPA tip; TPA long, base prolateral to palpal tibia prolateral trichobothrium, tip bent retrolaterally (Fig. 78C); PC median-sized, base not visible from dorsal view, distal setae close to distal clasp, distal clasp without striae, clasp extended apically (Fig. 78A); T without papillae; PT long, slender, without papillae; TS long, slender, without papillae; MSA absent; DSA tip straight, simple; EM absent (Fig. 78A, E); ARP with groove fitting E, round and narrow at tip; LER absent; VRP absent; TP wide, round at tip; E retrolaterally spiral at base, prolaterally spiral at tip (Fig. 78B, E). Opisthosoma: dorsal pattern see Fig. 68J. PMS with mAP, two AC; PLS with triad, 3+ AC (Fig. 78H).
Female (RMCA 224.501): Total length: 2.62. Prosoma: 1.03 long, 0.73 wide. Eyes: AME-AME: 0.02, AME width: 0.05, AME-ALE: 0.05, ALE width: 0.07, ALE- PLE: 0, PLE width: 0.07, PLE-PME: 0.04, PME width:
0.07, PME-PME: 0.07. Clypeus: not hirsute, one sub- AME seta. Sternum: 0.59 long; 0.54 wide. Legs: dorsal proximal macroseta on tibia I, II, III and IV 1.58, 1.76, 2.26 and 2.52 times diameter of tibia, respectively; Tm I: 0.60. Epigyne: CO posteriorly situated, receptacles long, wide (Fig. 78F, G). Opisthosoma: PMS with mAP, two AC, one CY; PLS with triad, two CY, 3+ AC (Fig. 78I).
Variation: The measurements are based on examined material.
Males (N = 3, means in parentheses): Total length 2.22–2.46 (2.33). Prosoma: 1.06–1.14 (1.09) long, 0.72– 0.74 (0.73) wide. Legs: dorsal proximal macroseta on tibia I, II, III and IV 0.12–0.13 (0.12), 0.13–0.19 (0.16), 0.91–1.68 (1.28) and 1.46–2.28 (1.88) times diameter of tibia, respectively; Tm I: 0.58–0.67 (0.64).
Females (N = 10, means in parentheses): Total length 2.42–3.07 (2.74). Prosoma: 1.03–1.18 (1.13) long, 0.73– 0.86 (0.79) wide. Legs: dorsal proximal macroseta on tibia I, II, III and IV 1.58–1.87 (1.72), 1.63–2.13 (1.90),
1.88–2.41 (2.18) and 2.15–2.68 (2.39) times diameter of tibia, respectively; Tm I: 0.60–0.69 (0.64).
Distribution: Ethiopia.
Habitat: Under stones in cultivated lands or woodlands.
Remarks: According to our phylogenetic analysis, this species lack the synapomorphic traits of Oedothorax s.s.. Its phylogenetic position resulted in Clade 22 sister to Clade 23. However, due to the lack of shared derived characters with other taxa in this study, its taxonomic affinity is undetermined. Therefore, we leave its taxonomic state provisionally unchanged.
description: Published as part of Lin, Shou-Wang, Lopardo, Lara & Uhl, Gabriele, 2022, Evolution of nuptial-gift-related male prosomal structures: taxonomic revision and cladistic analysis of the genus Oedothorax (Araneae: Linyphiidae: Erigoninae), pp. 417-584 in Zoological Journal of the Linnean Society 195 on pages 550-552, DOI: 10.1093/zoolinnean/zlab033, http://zenodo.org/record/6967774