Callitrichia picta Lin & Lopardo & Uhl, 2022

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), Zoological Journal of the Linnean Society 195, pp. 417-584 : 476

publication ID 10.1093/zoolinnean/zlab033

publication LSID


persistent identifier

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scientific name

Callitrichia picta

comb. nov.


( FIGS 19E View Figure 19 , 22E View Figure 22 , 24E View Figure 24 , 33 View Figure 33 ; SUPPORTING INFORMATION, FIG. S2C View Figure 2 )

Toschia picta di Caporiacco, 1949: 363 View in CoL , fig. 26a–c (Dmf).

Rhaebothorax hadzji Caporiacco, 1949: 368 , fig. 30a–c (Dm).

Toschia picta Holm, 1962: 157 View in CoL , fig. 58a–e, pl. V, figs 14, 15 (mf).

Toschia picta van Helsdingen, 1982: 178 View in CoL .

Mecynargus hadzji, Brignoli, 1983: 345 .

Oedothorax pictus Brignoli, 1983: 350 .

Examined material: D. R. Congo, Kivu-N. Province , Mt. Muleke (00°17’ S, 029°15’ E), 1820 m, 1♂ 5.vii.1963, coll. M, J. Celis, det. A. Holm, 1967 ( RMCA) GoogleMaps .


Males: This species shows no external prosomal modification, which distinguishes it from the congeners with prosomal modifications; the presence of a long, scaly ventral radical process distinguishes it from other Callitrichia species lacking external prosomal modification, except Ca. casta and Ca. hirsuta ; can be further distinguished from the former by its slightly laterally extended distal retrolateral margin of the palpal tibial prolateral apophysis. Males of this species are morphologically identical to Ca. hirsuta based on the inspection of figs 62–66 in Jocqué & Scharff (1986).

Females: Can be identified by the following combination of features: opisthosoma dark brownish grey, dorsal with a pale longitudinal stripe like in male; an obvious loop can be seen in the part of copulatory duct ectal to the spermathecae from ventral view of the vulva of epigyne (fig. 58E in Holm 1962); distance between the copulatory openings longer than in other species with the previous feature.


Male (RMCA): Total length: 2.17. Prosoma: 0.97 long, 0.68 wide, without modification ( Fig. 19E View Figure 19 ). Eyes: AME- AME: 0.04, AME width: 0.02, AME-ALE: 0.07, ALE width: 0.07, ALE-PLE: 0.01, PLE width: 0.07, PLE- PME: 0.05, PME width: 0.07, PME-PME: 0.05. Clypeus not hirsute, one sub-AME seta. Sternum: 0.53 long, 0.53 wide. Chelicerae: mastidia absent; stridulatory striae ridged, rows compressed and evenly spaced ( Fig. 22E View Figure 22 ). Legs: dorsal proximal macroseta on tibia I, II, III and IV 1.74, 2.14, 2.43 and 3.30 times diameter of tibia, respectively; Tm I: 0.70. Pedipalp: patella prolateral proximal vertical macrosetae absent; TPA large, distal part slightly dilated and truncate at tip ( Fig. 33C View Figure 33 ); PC base not visible from dorsal view, distal setae close to distal clasp, distal-setae-bearing area wide, externally protruded into a high blunt elevation, distal clasp extended apically ( Fig. 33A View Figure 33 ); T without papillae, PT truncated, apical part without papillae; TS absent ( Fig. 33D View Figure 33 ); MSA present; DSA wide, round at tip ( Fig. 33A View Figure 33 ); EM broad and flat, without papillae, not exceeding ARP; ARP pointed, with groove hosting E; LER absent; VRP long, with papillae between ARP and VRP; TP long, triangular; E short and stout, slightly retrolaterally curved, median part dorsally elevated ( Fig. 33B View Figure 33 ). Opisthosoma: dorsal pattern see Fig. 24E View Figure 24 ; PMS with mAP, two AC; PLS with triad, 3+ AC ( Fig. 33G View Figure 33 ).

Female (RMCA 111987): Total length: 2.61. Prosoma: 1.02 long, 0.77 wide. Eyes: AME-AME: 0.03, AME width: 0.04, AME-ALE: 0.04, ALE width: 0.6, ALE-PLE: 0.02, PLE width: 0.06, PLE-PME: 0.06, PME width: 0.06, PME-PME: 0.07. Clypeus: not hirsute, one sub- AME seta. Sternum: 0.62 long, 0.58 wide. Legs: dorsal proximal macroseta on tibia I, II, III and IV 2.19, 2.36, 2.74 and 3.38 times diameter of tibia, respectively; Tm I: 0.65. Epigyne: ( Fig. 33E, F View Figure 33 ). Opisthosoma: singlecoloured grey; PMS with mAP, two AC, CY; PLS with triad, two CY, 3+ AC.

Distribution: Congo, Kenya.

Remarks: Besides structures corresponding to anterior radical process, radical tailpiece and ventral radical process, Holm (1962) described the embolic division of this species as having a short mesal process close to the embolus, probably referring to the embolic membrane ( Fig. 33B, D View Figure 33 ). This species is similar to Ca. hirsuta from Tanzania [compare Figs 33 View Figure 33 and 19E View Figure 19 with figs 62–66 in Jocqué and Scharff (1986)]. It is even possible that Ca. hirsuta is a junior synonym of Ca. picta , which will require examining the male of Ca. hirsuta . Following the results of our phylogenetic analysis, this species is transferred to Callitrichia , a placement also consistent with morphological traits of the species.


Royal Museum for Central Africa














Callitrichia picta

Lin, Shou-Wang, Lopardo, Lara & Uhl, Gabriele 2022

Toschia picta

di Caporiacco L 1949: 363

Rhaebothorax hadzji

di Caporiacco L 1949: 368
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