Callitrichia latitibialis, (BOSMANS, 1988) COMB., 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 : 467-468

CALLITRICHIA LATITIBIALIS ( BOSMANS, 1988) COMB. NOV.

( FIGS 19P , 22P , 24P , 28 ; SUPPORTING INFORMATION, FIG. S2M )

Oedothorax latitibialis Bosmans, 1988: 17 , fig. 5E–g (Dm).

Type material: Holotype: Cameroon: Bambouto Mountains, 2700 m, pitfall in montane grassland, 1♂ 17.i.1983 ( RMCA 165.079, examined). Paratypes: 1♂, same data ( RMCA 165.087, examined).

Diagnosis:

Males: This species can be identified by the lack of prosomal modification and the conspicuous, characteristic male palpal tibial apophyses, similar to that of Ca. longiducta , but with a different denticle morphology on tibial prolateral apophyses; the body size of this species is larger.

Description:

Male (holotype): Total length: 2.11. Prosoma: 1.09 long, 0.89 wide, unmodified ( Fig. 19P ). Eyes: AME-AME: 0.02, AME width: 0.06, AME-ALE: 0.03, ALE width: 0.09, ALE-PLE: 0.01, PLE width: 0.08, PLE-PME: 0.05, PME width: 0.09, PME-PME: 0.05. Chelicerae: mastidia absent; stridulatory striae rows widely and evenly spaced ( Fig. 22P ). Clypeus: not hirsute, one sub- AME seta. Sternum: 0.62 long, 0.61 wide. Legs: dorsal proximal macroseta on tibia I 1.61 times diameter of tibia; Tm I: 0.63. Pedipalp: patella prolateral proximal vertical macrosetae absent; tibia with slender, highly scletotized, pointed, dorsally situated apophysis bent retrolaterally at tip, base connected with TPA through thin plate; TPA wide, flat, apical ridge with peculiar denticles ( Fig. 28C ); PC large, base not visible from dorsal view, distal setae close to distal clasp, distalsetae-bearing area wide, distal clasp without striae, clasp extended apically; T without papillae, PT without papillae, distal rim thin and smooth at margin; TS short, without papillae; MSA inconspicuous; DSA tip straight; EM flat, anterior margin with small papillae, not exceeding ARP ( Fig. 28A ); ARP pointed; LER absent; VRP present, retrolaterally oriented; TP tip slender; E slightly retrolaterally spiral ( Fig. 28B, D ). Opisthosoma: single-coloured dark grey ( Fig. 24P ); PLS with triad, 3+ AC ( Fig. 28E ).

Male (paratype): Prosoma: 1.10 long, 0.88 wide. Legs: dorsal proximal macroseta on tibia II and III 1.70 and 2.31 times diameter of tibia, respectively; Tm I: 0.63.

Female: Unknown.

Distribution: Cameroon, only known from the type locality.

Habitat: Montane grasslands.

Remarks: According to the results of our phylogenetic analysis this species is transferred to Callitrichia , a placement also consistent with morphological traits of the species.

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 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 28. Callitrichia latitibialis (Bosmans, 1988). A–D, male right palp, images flipped horizontally. A, retrolateral view. B, prolateral view. C, dorsal view. D, ventral view. E, male left posterior lateral spinneret. Scale bar 0.1 mm.