Bunyoronius Bonaldo, Ramírez & Haddad, 2022

Eb. Bonaldo, Ramírez, Martín J., Om. Labarque, Shimano, Yulie, Silva-Junior, Cláudio J. & Haddad, Charles R., 2022, Switching identities: a revision of the Afrotropical spider genus Carteronius Simon 1897 (Araneae, Corinnidae), senior synonym of Mandaneta Strand, 1932, with a new genus of the Pronophaea group, Zootaxa 5205 (4), pp. 343-373 : 367-368

Bunyoronius Bonaldo, Ramírez & Haddad gen. nov.

Type species: Bunyoronius femoralis sp. nov.

Etymology. The generic name, masculine, is a contraction of the words Bunyoro and Carteronius , honoring the Bunyoro people, a pre-colonial Kingdom on the territory of modern Uganda, including the Budongo Forest, type locality of the type species.

Diagnosis. Members of the genus Bunyoronius gen. nov. share with those of Carteronius the trilobulated RTA, with an apical spur inserted in the base of the ventral lobe, sperm duct with a single ventral fold, and the basally widened, curved embolus surrounding tegular margins. They can be readily recognized by large apical retrolateral femoral apophysis, ventral fold of sperm duct oriented retro-dorsally; median apophysis absent, pit vestigial; embolus inserted basally, with wide bifid tip ( Figs 22A–C , 23A–C, F–I ). Females can be recognized by the epigynal plate divided by two lateral, longitudinal ridges, forming a median atrium, and by the copulatory openings oriented anteriorly ( Fig. 22D, E ).

Description. Medium-sized spiders, 6.03 7.70 mm in length. Carapace reddish-brown, surface finely granulate, with few long hairs; very broad, sub-oval, as long as wide, cephalic region weakly demarcated posteriorly, swollen antero-laterally, higher than thoracic region; thoracic region abruptly depressed, posteriorly rounded, thoracic fovea present ( Fig. 20B ). Clypeus low, height nearly one AME diameter. AER straight in frontal view, ALE oblique, eyes equidistant; PER slightly procurved in dorsal view, slightly wider than AER, eyes equidistant; AME largest, approximately two times ALE diameter, remaining eyes sub-equal in width, medians and PLE circular; ALE suboval. Chilum present, entire, with large median tubercle in both males and females. Chelicerae nearly as long as half the length of carapace, frontal surface granulate, slightly geniculated in both sexes, unmodified in males; basal boss evident, promargin with three teeth, retromargin with two teeth ( Fig. 21A ). Endites convergent, promargin slightly protruded anteriorly, retromargin slightly excavated; labium sub-squared, as long as wide, slightly longer than half endite length, proximal lateral constrictions shallow. Sternum shield-shaped, slightly longer than wide; surface covered by small hair-bearing tubercles, precoxal and intercoxal sclerites present, margins well defined, especially antero-laterally. Retrocoxal hymen present ( Fig. 21B, C ). Leg formula: I.II.V.III. Legs long, I–II sturdier; femur I ( Fig. 21D ) with one dorsal spine, tibia I ( Fig. 21F ) with seven pairs of ventral spines, metatarsus I with two pairs of ventral spines. Tarsus I with dorsal cluster of trichobothria; tarsal organ sub-apical ( Fig. 21E ). Abdomen oval, dorsal and ventral scuta absent. Spinnerets not surveyed with SEM; female (under light microscopy): PMS with three cylindrical gland spigots; PLS with two cylindrical gland spigots.

Figures

FIGURE 20. Bunyoronius femoralis sp. nov.: A male abdomen, dorsal view; B male carapace, dorsal view; C female abdomen, dorsal view; D female carapace, dorsal view. Scale: 1 mm.

FIGURE 21. Bunyoronius femoralis sp. nov.: A chelicerae, retrolateral view; B coxa I, retrolateral; C same, coxal window; D femur I, retrolateral view; E tarsus I, dorsal view (arrow: tarsal organ); F macroseta, tibia I, retrolateral view.

FIGURE 22. Bunyoronius femoralis sp. nov.: A male palp, ventral view; B same, retrolateral view; C palpal femur, ventral view; D epigynum, ventral view; E same, dorsal view. Abbreviations: E, embolus; C, conductor; MA, median apophysis; VL, ventral lobe; ML, medial lobe; DL, dorsal lobe; AS, spur; RFA, retrolateral femoral apophysis; CO, copulatory opening; CDv, ventral sector of the copulatory duct; CDd, dorsal sector of the copulatory duct; ST2 secondary spermatheca; ST1 primary spermatheca. Scale: 1 mm.

FIGURE 23. Bunyoronius femoralis sp. nov.: A male palp, retrolateral view; B palpal femur, RFA, retrolateral view; C same, retro-dorsal view; D palpal tibia, RTA, antero-lateral view; E cymbium, antero-dorsal view showing patch of chemosensory setae; F cymbium and bulb, ventral view; G same, prolateral view; H same, retrolateral view; I distal sector of bulb, ventral view. Abbreviations: E, embolus; C, conductor; VL, ventral lobe; ML, medial lobe; DL, dorsal lobe; AS, spur; RFA, retrolateral femoral apophysis.