Evolution of nuptial-gift-related male prosomal structures: taxonomic revision and cladistic analysis of the genus Oedothorax (Araneae: Linyphiidae: Erigoninae) Author Lin, Shou-Wang Author Lopardo, Lara Author Uhl, Gabriele text Zoological Journal of the Linnean Society 2022 2021-11-20 195 417 584 journal article 115951 10.1093/zoolinnean/zlab033 75b10efe-a17d-4d10-b46e-094c6a7ebf01 0024-4082 6967774 BE2B3859-8F6A-4543-8A69-91840F82377B CALLITRICHIA JUGUMA (SCHARFF, 1990) COMB. NOV. ( FIGS 19I , 21 , 22I , 24I; SUPPORTING INFORMATION, FIG. S2F ) Ophrynia juguma Scharff, 1990a: 66 , figs 164–172 (Dmf). Examined material: Tanzania : Uzungwa Mts. , Iringa Region , Uzungwa Scarp Forest Reserve , 2♂ 2♀ , leg. N, Scharff ( ZMUC ) . Diagnosis: Males: Similar to Ca. rostrata , Ca. perspicuua and Ca. insulana in the shapes of the flat PME lobe and inter-AME-PME lobe, forming the narrow inter-AME- PME groove (figs 155, 164 and 173 in Scharff, 1990; fig. 116 in Jocqué & Scharff, 1986 ), which distinguishes them from other erigonines; this species can be further distinguished from the latter three species by the shape of the palpal tibial apophysis ( Fig. 21A–C , in comparison to figs 157 and 177 in Scharff, 1990a ; fig. 118 in Jocqué & Scharff, 1986 ). Females: Epigyne morphology similar to other Callitrichia species , but can be distinguished by the particularly close distance between the spermathecae ( Fig. 21E, F , in comparison to e.g. Fig. 18G , fig. 115 in Jocqué & Scharff, 1986 , and fig. 163 in Scharff, 1990a ). Description: Male ( ZMUC ): Total length: 2.08. Prosoma: 0.89 long, 0.74 wide, with a narrow and small PME lobe; posterior part with fine, long setae over PME; frontal part ends in a ridge, pointing up and forward, curved inward in the middle, with transversal slit at the peak ( Fig. 19I ). AME-AME: 0.04, AME width: 0.04, AME- ALE: 0.03, ALE width: 0.07, ALE-PLE: 0.07, PLE width: 0.06, PLE-PME: 0.07, PME width: 0.04, PME- PME: 0.07. Clypeus: not hirsute, one sub-AME seta. Sternum: 0.51 long, 0.49 wide. Chelicerae: mastidia absent; stridulatory striae ridged, rows compressed and evenly spaced ( Fig. 22I ). Legs: metatarsi and tarsi of legs I and II with perpendicular lateral setae, long and numerous; dorsal proximal macroseta on tibia I, II, III and IV 1.44, 1.57, 2.10 and 2.96 times diameter of tibia, respectively;Tm I: 0.79. Pedipalp: patella prolateral proximal vertical macrosetae absent; tibia with one prolateral, two retrolateral trichobothria; TPA large, broadly rounded, prolateral side straight, retrolateral side with small, round, scaly distal process ( Fig. 21C ); PC base not visible from dorsal view, distal setae close to distal clasp, distal-setaebearing area wide, distal clasp extended apically ( Fig. 21A ); T without papillae, PT truncated, apical part with papillae; TS absent ( Fig. 21A ); MSA present; DSA wide, median part of tip concave ( Fig. 21A ); EM broad and flat, without papillae, exceeding ARP; ARP thick, bifid; LER absent; VRP short, with papillae extended to medan part of R; TP long, round at tip; E short and stout, slightly retrolaterally curved ( Fig. 21B, C ). Opisthosoma: dorsal pattern see Fig. 24I ; PMS without spigots; PLS with one FL ( Fig. 21G ). Female ( ZMUC ): Total length: 1.87. Prosoma: 0.79 long, 0.66 wide. AME-AME: 0.03, AME width: 0.04, AME-ALE: 0.02, ALE width: 0.07, ALE-PLE: 0.01, PLE width: 0.06, PLE-PME: 0.04, PME width: 0.05, PME-PME: 0.05. Clypeus: not hirsute, one sub-AME seta. Sternum: 0.51 long, 0.49 wide. Legs: dorsal proximal macroseta on tibia I, II, III and IV 2.88, 2.76, 2.67 and 3.21 times diameter of tibia, respectively; Tm I: 0.88. Epigyne of Clade 13 characteristic morphology, borders between ventral and dorsal plates converging anteriorly and posteriorly, CO posterior to spermathecae ( Fig. 21E, F ). Opisthosoma: dorsal pattern as male; spigots as in male, PMS with one CY; PLS with two CY ( Fig. 21H ). Remarks: Following the results of our phylogenetic analysis, this species is transferred to Callitrichia , a placement also consistent with morphological traits of the species.