Hexapopha baehrae, Feitosa & Ott & Bonaldo, 2023

Feitosa, Níthomas M., Ott, Ricardo & Bonaldo, Alexandre B., 2023, Meeting the southern brothers: a revision of the Neotropical spider genus Hexapopha Platnick, Berniker & Víquez, 2014 (Araneae, Oonopidae), Zootaxa 5329 (1), pp. 1-150 : 94-97

Hexapopha baehrae sp. nov.

Figs 61–63 ; Map 4

Type material: Holotype: male from Estaç „o de Pesquisa Agropecuária – FEPAGRO, Viam„o, Rio Grande do Sul, Brazil (30°02’17.04”S, 51°01’20.66”W), Apr. 12, 1995, R. Ott leg., deposited in MCTP, PBI_OON 40585 . Paratypes: same data and collector as holotype, 1♁, 3♀ ( MCTP 8554 , PBI _ OON 46377 ); Jan. 12, 1996, 1♀ ( MCN 56852 , PBI _ OON 46372 ) .

Etymology. The specific name is a patronym honoring the arachnologist Barbara Baeher (Queensland Museum), recognizing her great contribution to the Goblin Spiders PBI.

Diagnosis. Males of this species resemble those of H. excavata sp. nov. and H. numerosa sp. nov. by the conductor nearly the same size of the embolus, without proximal projection and with single tip, endite’s P1 longitudinally oriented, not folded over itself, and by the absence of endite’s P3 ( Figs 60C,H , 66C,H ); they can be distinguished from those of H. numerosa sp. nov. by endite’s P1 directed posteriorly ( Fig. 63C ) (directed anteriorly in H. numerosa sp. nov.) and from those of H. excavata sp. nov. by the endite’s P2 represented by a large bent plate ( Fig. 63C ) (a small acute process in H. excavata sp. nov.) Females differ from those of other species with U-shaped postepigastric scape fused to a broad postepigastric plate (longer than wider or nearly as long as wide) (H. una sp. nov., H. brasiliana (Bristowe) and H. hone Platnick, Berniker & Víquez , Figs 7G–H , 68G–H ; Platnick et al., 2014, figs 85–86) as follows: from H. una sp. nov. by the genital duct narrow, situated on the anterior portion of the postepigastric plate (wide, almost reaching the posterior portioin of postepigastric plate in H. una sp. nov.); from H. brasiliana by the curved arms of T-shaped genitalic process (straight in H. brasiliana ) and from H. hone by the procurved arms of T-shaped genitalic process (recurved in from H. hone ) ( Figs 62F–H ).

Description. Male (PBI_OON 40585). Total length 1.69. CEPHALOTHORAX: Carapace dark red-brown, with Coxapopha -like pattern, pars cephalica with two posterior humps in lateral view, surface of elevated portion of pars cephalica smooth, sides granulate, fovea absent ( Figs 61B–C ). Eyes ALE circular, PME circular, PLE oval; posterior eye row recurved from above, procurved from front; ALE separated by more than their diameter, ALE-PLE separated by less than ALE radius, PME touching for less than half their length, PLE-PME separated by less than PME radius ( Fig. 61E ). Sternum longer than wide, orange-brown, median concavity absent, with radial furrows between coxae I–II, II–III, III–IV, furrow with rows of small pits, radial furrow opposite coxae III absent, surface finely reticulate, without pits, microsculpture absent ( Figs 61D , 62A ). Mouthparts: Chelicerae distal region unmodified ( Fig. 61E ). Labium anterior margin anteriorly projecting at middle, wider than long ( Fig. 63C ). Endites with a median projection (mp), a P1 and a P2; mp short, directed anteriorly; P1 hornlike, tip flattened, situated posteriorly to P2, directed posteriorly to mp. P2 lamellar, bent downwards, situated anteriorly to P1 ( Figs 61F , 63B–C ). ABDOMEN: dorsum soft portions pale orange. Book lung covers small, very narrow. Dorsal scutum orange-brown, covering full length of abdomen, no soft tissue visible from above. Epigastric scutum not protruding. Postepigastric scutum orange-brown, almost semicircular, covering nearly full length of abdominal length ( Figs 61B,G ). LEGS: pale orange. GENITALIA: Epigastric region with sperm pore situated at level of posterior spiracles. Palp proximal segments pale orange; embolus tip flattened, not bent upwards; conductor present, without projections, as long as embolus, tip flattened, its tip bent upwards at an angle of almost 45° ( Figs 61G–I , 63F–I ).

Female (PBI_OON 46372). As in male except as noted. Total length 1.86. CEPHALOTHORAX: Carapace without any pattern, pars cephalica strongly elevated in lateral view ( Fig. 62B ). Mouthparts: Chelicerae, endites and labium orange-brown. Labium rectangular, anterior margin not indented at middle ( Fig. 62D ). ABDOMEN: Dorsal scutum covering more than 3/4 of abdomen. Postepigastric scutum covering about 3/4 of abdominal length ( Figs 62A–B,F ). GENITALIA: Ventral view: postepigastric plate tongue-shaped; postepigastric scape present; copulatory orifice slit shaped, situated on the anterior margin of postepigastric plate. Dorsal view: anterior genitalic process with small, procurved arms; genital duct coiled; the anterior uterine sclerite has a slit-shaped opening in anterior surface ( Figs 62G–H , 63J–L ).

Other material examined. Brazil. Rio Grande do Sul. Santa Cruz do Sul: Linha Nova (29°38’19.70”S, 52°23’19.89”W) , Aug. 21, 1994, R. Ott leg., 1♁ ( MCN 9063 , PBI _ OON 46371 ); 2♁, 5♀ ( MCTP 9063 , PBI _ OON 44166 ) ; Aug. 28, 1995, 1♁ ( MCN 56853 , PBI _ OON 46381 ) ; Nov. 20, 1994, 1♁, 4♀ ( MCTP 9067 , PBI _ OON 44506 ) .

Distribution. Known from Viam„o and Santa Cruz do Sul, state of Rio Grande do Sul, Brazil ( Map 4 ).

Figures

MAP 4. Distribution of Hexapopha species.

FIGURES 7A–H. Hexapopha una sp. nov., female (IBSP 64441; PBI_OON 51576). A–B habitus. A, dorsal view. B lateral view. C–E carapace. C dorsal view. D ventral view. E anterior view. F abdomen, ventral view. G–H epigastric region. G ventral view. H dorsal view. Scale bars: 0.1mm.

FIGURES 60A–L. Hexapopha numerosa sp. nov., SEM images. A–I male (MPEG 37036; PBI_OON 46329). J–L female (MPEG 15316; PBI_OON 45438). A habitus, lateral view. B carapace, ventral view. C mouthparts, ventral view. D endites, showing median projections and projection P1. E–F left palp. E prolateral view. F retrolateral view. G–I embolus. G prolateral view. H retrolateral view. I apical view. J epigastric region, ventral view. K internal genitalia, dorsal view (arrow: slit-shaped opening on posterior uterine sclerite). L detail of J, copulatory opening. Abbreviations: as, anterior sclerite; d, duct; mp, median projection; P, projection; vs, ventral surface of distal hook of posterior sclerite.

FIGURES 61A–I. Hexapopha baehrae sp. nov., male (MCN 8554; PBI_OON 46377). A–B habitus. A dorsal view. B lateral view. C–E carapace. C dorsal view. D ventral view. E anterior view. F mouthparts, ventral view. G abdomen, ventral view. H–I left palp. H prolateral view. I retrolateral view. Scale bars: 0.1mm.

FIGURES 62A–H. Hexapopha baehrae sp. nov., female (MCN 8554; PBI_OON 46377). A–B habitus. A dorsal view. B lateral view. C–E carapace. C dorsal view. D ventral view. E anterior view. F abdomen, ventral view. G–H epigastric region. G ventral view. H dorsal view. Scale bars: 0.1mm.

FIGURES 63A–L. Hexapopha baehrae sp. nov., SEM images. A–I male (MCN 8554; PBI_OON 46377). J–L female (MCN 8554; PBI_OON 46377). A carapace, ventral view. B mouthparts, ventral view. C endites ventral view. D chelicerae, posterior view. E sperm pore, ventral view. F–G left palp. F prolateral view. G retrolateral view. H–I embolus. H prolateral view. I retrolateral view. J epigastric region, ventral view. K internal genitalia, dorsal view. L detail of K, showing T-shaped anterior genitalic process. Abbreviations: as, anterior sclerite; mp, median projection; P, projection.

FIGURES 66A–L. Hexapopha excavata sp. nov., SEM images. A–I male (MPEG 10917; PBI_OON 45369). J–L female (MPEG 37774; PBI_OON 45685). A–B carapace. A lateral view. B ventral view. C mouthparts, ventral view. D endites, lateral view. E detail of D, showing projection P2. F chelicerae, posterior view. G left palp, prolateral view. H–I embolus. H prolateral view. I retrolateral view. J epigastric region, ventral view. K internal genitalia, dorsal view. L detail of K, showing T-shaped anterior genitalic process. Abbreviations: as, anterior sclerite; d, duct; mp, median projection; P, projection.

FIGURES 68A–H. Hexapopha brasiliana (Bristowe), female (IBSP 60493; PBI_OON 44502). A–B habitus. A dorsal view. B lateral view. C–E carapace. C dorsal view. D ventral view. E anterior view. F abdomen, ventral view. G–H epigastric region. G ventral view. H dorsal view. Scale bars: 0.1mm.