Selenobrachys Schmidt, 1999

Genus Selenobrachys Schmidt, 1999 stat. rev.

Type species.

Selenobrachys philippinus Schmidt, 1999 , comb. rest., by original designation and monotypy.

Included species.

(2 species) S. philippinus Schmidt, 1999 , comb. rest., S. ustromsupasius sp. nov.

Diagnosis.

Selenobrachys stat. rev. differs from all other selenocosmiine genera (including Chilocosmia stat. rev.), except sister genera Orphnaecus and Phlogiellus , in having a long prolateral superior keel (PS) (= retrolateral keel in West et al. 2012) from base to tip with a pronounced basal lobe (BL) on the embolus of males (Figs 10 A – F View Figure 10 , 14 A – E View Figure 14 ). Selenobrachys stat. rev. differs from Orphnaecus , and Phlogiellus (i) in having an ovoid proximally truncated and distally mildly tapering lyrate patch on the prolateral maxilla, with rows of strong paddle-shaped bacillae possessing thick and strong shafts (Figs 7 F, G View Figure 7 , 1 E, F View Figure 1 , 17 E, F View Figure 17 , 20 E View Figure 20 ) (reniform lyrate morphology for Orphnaecus ; see above and Fig. 20 G View Figure 20 ; rudimentary patch of needleform rods, if present, for Phlogiellus ; see Nunn et al. 2016) and where the largest ones in the lowest row have a more pointed tip in prolateral view (Fig. 20 E View Figure 20 ); (ii) in having greater number of cheliceral strikers (<150; excluding tertiary rows) (Figs 8 C View Figure 8 , 13 C, D View Figure 13 , 17 C, D View Figure 17 ); (iii) in having a long and cylindrical palpal tibia in males (Figs 9 A – D View Figure 9 , 15 B, C View Figure 15 ) (proximally swollen and distally tapering in Phlogiellus and Orphnaecus ; see Fig. 15 A View Figure 15 and Nunn et al. 2016); and (iv) in having a broad and short, not reduced ends, almost symmetrical, tombstone-shaped spermathecal lobe in females (Fig. 18 A, B View Figure 18 ). It further differs from Orphnaecus in lacking long and dense dorsal scopulate palpal brush in adult males (Figs 9 D View Figure 9 , 15 B, C View Figure 15 ) and in having short sword-like femoral setation on prolateral femur I (Fig. 21 E – H View Figure 21 ). It also differs from Phlogiellus in having a greater number of labial cuspules (~ 331–760) and a wider fovea than the ocular tubercle ( Nunn et al. 2016; Sivayyapram et al. 2020).

Distribution.

Philippine endemic: Negros Is. ( Schmidt 1999; West et al. 2012) and Romblon Is. (this study; Fig. 22 View Figure 22 ). Probably restricted to West Visayas PAIC and Romblon PAIC.

Etymology.

A combination of two generic names, Selenocosmia and Chilobrachys (Seleno- + - brachys) ( Schmidt 1999). Gender is masculine.