Callitrichia sellafrontis, SCHARFF, 1990

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 : 478-480

CALLITRICHIA SELLAFRONTIS SCHARFF, 1990

( FIGS 19H , 20 , 22H , 24H , 26D; SUPPORTING INFORMATION, FIG. S2F )

Callitrichia sellafrontis Scharff, 1990a: 19 , figs 22–30 (Dmf).

Type material: Holotype: Tanzania: Uzungwa Mts. , lringa Region, Uzungwa Scarp Forest Reserve (= Chita

Forest) above Chita village, montane rain forest, 1600 m, sweepnetted, ♂ 12.xi.1984, leg. N, Scharff ( ZMUC, not examined). Paratypes: same locality with holotype 5♂ 11♀, leg. N, Scharff ( ZMUC, not examined) ; same locality, 1650 m, sweep-netted, 1♂ 3♀ 12–13.xi.1984, leg. N, Scharff ( ZMUC, not examined) ; same locality, 1600 m, litter, 1♂ 6♀ 08–12.xi.1984, leg. N, Scharff ; same locality, 1500 m, sweep-netted, 9♂ 16♀ 02–13. xi.1984, leg. N, Scharff ( ZMUC, not examined) .

Examined material: Tanzania: Iringa. Mufindi Dist. Uzungwa Scarp For. Res. 8°30.05’S, 35°52’ E. elev. 1515 m, 2♂ 3♀ 4.iii.1996. McKamey et al. Canopy Fog 35 ( ZMUC, 3 vials) .

Diagnosis:

Males: This species can be recognized by its unique saddle-shaped prosomal modification and the pair of distinct setal tuft on the interocular lobe.

Females: Somatic features, as well as epygyne morphology, similar to many congeners like Ca. hamifera , Ca. kenyae , Ca. ruwenzoriensis etc. Further detailed comparison of epigyne morphologies is needed (beyond the scope of the current study).

Description:

Male ( ZMUC): Total length: 1.6. Prosoma: 0.76 long, 0.7 wide, saddle-shaped, with inter-AME-PME lobe and PME lobe; inter-AME-PME-lobe with one pair of setal tufts on frontal surface and thin, long setae on lateral, dorsal and posterior surface ( Figs 19H , 26D ). Eyes: AME-AME: 0.04, AME width: 0.05, AME-ALE: 0.04, ALE width: 0.05, ALE-PLE: 0.02, PLE width: 0.05, PLE-PME: 0.17, PME width: 0.05, PME-PME: 0.05. Clypeus: not hirsute, one sub-AME seta. Sternum: 0.48 long, 0.52 wide. Chelicerae: mastidia absent; stridulatory striae ridged, rows compressed and evenly spaced ( Fig. 22H ). Legs: dorsal proximal macroseta on tibia II 1.43 times diameter of tibia; Tm I: 0.80. Pedipalp: patella prolateral proximal vertical macrosetae absent; TPA large, apically hooked and hollow ventrally ( Fig. 20C ); PC base not visible from dorsal view, distal setae close to distal clasp, distal-setae-bearing area wide, distal clasp extended apically ( Fig. 20A ); T without papillae, PT truncated, without papillae; TS median-long, slander, without papillae ( Fig. 20D ); MSA present; DSA wide, tip with with several denticles ( Fig. 20A ); EM broad and flat, without papillae, not exceeding ARP; ARP thick; LER absent; VRP long; radical part close to ARP wrinkled, with papillae between ARP, VRP and E; TP long; E retrolaterally spiral, flat, with papillae and striation ( Fig. 20B, E ). Opisthosoma: dorsal pattern see Fig. 24H ; PMS without spigots; PLS with one FL ( Fig. 20K ).

Female ( ZMUC): Total length: 2.1. Prosoma: 0.82 long, 0.64 wide. Eyes: AME-AME: 0.02, AME width: 0.05, AME-ALE: 0.03, ALE width: 0.06, ALE-PLE: 0.01, PLE width: 0.05, PLE-PME: 0.06, PME width: 0.05, PME- PME: 0.05. Clypeus: not hirsute, one sub-AME seta. Sternum: 0.48 long, 0.48 wide. Legs: dorsal proximal macroseta on tibia I, II, III and IV 3.43, 3.41, 4.11 and 3.75 times diameter of tibia, respectively; Tm I: 0.75. Epigyne: Clade 13 characteristic morphology ( Fig. 20F– H ); Opisthosoma: dorsal pattern as male; spigots as in male, PMS with one CY; PLS with two CY ( Fig. 20I, J ).

Remarks: Males of this species have a pair of featherlike setal tufts at the interocular region, superficially similar to those found in Mitrager coronata (Tanasevitch, 1998) comb. nov. and related species. However, the structure in this species is formed by many aggregated setae, while each of the two pairs of feather-like setae found in Mitrager species are branched single large setae.

CALLITRICHIA UNCATA ( JOCQUÉ & SCHARFF, 1986)

Figures

Figure 2. The first part of the three most-parsimonious trees generated from the analysis of Matrix II, with Bremer/ Jackknife support valuesshown beside nodes.The presence/absence of clades in the consensus trees of the most-parsimonious trees of the implied weights analysis with different k values are shown in the box under/on the branches: black for presence when considering all taxa; grey for presence only when Callitrichia convector (Tanasevitch, 2014) and Ca. usitata (Jocqué & Scharff, 1986) are not considered; white for absence.

Figure 19. Male prosomal morphology, lateral. A, ‘Oedothorax’ meghalaya Tanasevitch, 2015 (traced from photograph). B, ‘Oe.’ uncus Tanasevitch, 2015 (traced from photograph). C, Holmelgonia basalis Jocqué & Scharff, 1986 (Jocqué & Scharff, 1986, fig. 18). D, Callitrichia holmi (Wunderlich, 1978) (traced from photograph). E, Ca. picta (Caporiacco, 1949) (Holm 1962, fig. 58). F, Ca. gloriosa (Jocqué, 1984) (traced from photograph). G, Ca. convector Tanasevitch, 2014 (traced from photograph). H, Ca. sellafrontis Scharff, 1990 (traced from photograph). I, Ca. juguma (Scharff, 1990) (Scharff 1990a, fig. 164). J, Ca. uncata (Jocqué & Scharff, 1986) (Jocqué & Scharff, 1986, fig. 130). K, Ca. pilosa (Wunderlich, 1978) (traced from photograph). L, Ca. usitata (Jocqué & Scharff, 1986) (traced from photograph). M, Ca. legrandi (Jocqué, 1985) (Jocqué, 1985, fig. 21). N, Ca. macrophthalma (Locket & Russell-Smith, 1980) (traced from photograph). O, Ca. muscicola (Bosmans, 1988) (traced from photograph). P, Ca. latitibialis (Bosmans, 1988) (traced from photograph). Q, Ca. longiducta (Bosmans, 1988) (traced from photograph). R, Nasoona setifera (Tanasevitch, 1998) (Tanasevitch, 1998a, fig. 3). S, N. crucifera (Thorell, 1895) (Tu & Li, 2004, fig. 6A).

Figure 20. Callitrichia sellafrontis Scharff, 1990. A–D, male left palp. A, retrolateral view. B, prolateral view. C, dorsal view. D, ventral view. E, male right palp, apical view, image horizontally flipped. F–H, epigyne. F, ventral view. G, dorsal view. H, external morphology. I, female right anterior lateral spinneret and posterior lateral spinneret. J, female right posterior median spinneret, dorsal view. K, male left spinnerets. Scale bars 0.1 mm.

Figure 22. Male chelicerae, stridulatory striae on lateral side. A, ‘Oedothorax’ meghalaya. B, ‘Oe.’ uncus. C, Holmelgonia basalis. D, Callitrichia holmi. E, Ca. picta. F, Ca. gloriosa. G, Ca. convector. H, Ca. sellafrontis. I, Ca. juguma. J, Ca. uncata. K, Ca. pilosa. L, Ca. usitata. M, Ca. legrandi. N, Ca. macrophthalma. O, Ca. muscicola. P, Ca. latitibialis. Q, Ca. longiducta. R. Nasoona setifera. S, N. crucifera. Scale bars 0.05 mm.

Figure 24. Male opisthosoma, dorsal view. A, ‘Oedothorax’ meghalaya Tanasevitch, 2015. B, ‘Oe.’ uncus Tanasevitch, 2015. C, Holmelgonia basalis Jocqué & Scharff, 1986. D, Callitrichia holmi (Wunderlich, 1978). E, Ca. picta (Caporiacco, 1949). F, Ca. gloriosa (Jocqué, 1984). G, Ca. convector Tanasevitch, 2014. H, Ca. sellafrontis Scharff, 1990. I, Ca. juguma (Scharff, 1990). J, Ca. uncata (Jocqué & Scharff, 1986). K, Ca. pilosa (Wunderlich, 1978). L, Ca. usitata (Jocqué & Scharff, 1986). M, Ca. legrandi (Jocqué, 1985). N, Ca. macrophthalma (Locket & Russell-Smith, 1980). O, Ca. muscicola (Bosmans, 1988). P, Ca. latitibialis (Bosmans, 1988). Q, Ca. longiducta (Bosmans, 1988). R, Nasoona setifera (Tanasevitch, 1998). S, N. crucifera (Thorell, 1895). Scale bars 0.1 mm.

Figure 26. Branched setae at interocular region. A–B, Mitrager angela (Tanasevitch, 1998). A, frontal view. B, lateral view. C, M. coronata (Tanasevitch, 1998), frontal view. D, Callitrichia sellafrontis Scharff, 1990. E–F, Ca. gloriosa (Jocqué, 1984). E, overview. F, closer view.