Guriurius Marta, Bustamante, Ruiz & Rodrigues, 2022

Marta, Kimberly S., Bustamante, Abel A., Ruiz, Gustavo R. S., Teixeira, Renato A., Hagopián, Damián, Brescovit, Antonio D., Valiati, Victor Hugo & Rodrigues, Everton N. L., 2022, A new huriine genus and notes on morphological characters (Araneae: Salticidae: Salticinae), Zootaxa 5124 (4), pp. 431-457 : 434-435

Guriurius Marta, Bustamante, Ruiz & Rodrigues , gen. nov.

urn:lsid:zoobank.org:act:D4472965-102F-45C8-BA32-691800B2DDBA

Figs 1–34 , 59–60 , 69–78

Type species. Guriurius minuano Marta, Bustamante, Ruiz & Rodrigues , sp. nov.

Etymology. The name is a combination of “Guri”, which means “boy” in the gaúcho (southern Brazil) culture, and Hurius , type genus of the tribe. Masculine in gender.

Diagnosis. Guriurius is the only huriine genus in the tribe that has the RvTA with a fold ventrally and serrulate distal edge (like denticles; Figs 5–8 , 21–22, 25–26 , 31–34 , 59 – 60 ), and females with a sclerotized dorsal plate that covers part of the copulatory ducts ( Figs 13–14 , 23–24 ).

Males of Guriurius resemble those of Atelurius , Scoturius and Urupuyu by the general shape of the cymbium, the circular tegulum, and the dorso-prolateral embolar path around the tegulum ( Figs 5 , 21, 25 , 31 ). In addition, males resemble those of Simonurius by having a long and sinuous RTA and by the RvTA not exceeding the ventral region of the tegulum ( Figs 59–60 ). Males of Guriurius differ from these genera by the shape of RvTA (see above). Females of Guriurius resemble those of Atelurius and Scoturius in the large copulatory openings forming an atrium ( Figs 13 , 23 , 47 , 68 ), but differ from those by the spermathecae arranged in the anterior region of the atrium ( Figs 13–14 ). Finally, females of Guriurius differ from those of Hurius , Scoturius and Urupuyu by the presence of large and tubular LPO ( Figs 14 , 24 ).

Description. Length 3.0–4.0, yellow-brown salticids ( Figs 1–4 , 9–12 , 15–20 , 27–30 ). Carapace reddish-brown, granulated cephalic region ( Fig. 69 ) lighter with white setae on sides, dark thoracic region and reddish posterior slope ( Figs 1 , 9 , 19–20 , 27 ). Anterior half of thoracic region at the same level of cephalic region; posterior thoracic slope abrupt. Eyes surrounded by black spots and white scales. Chelicera small and vertical in both sexes (not dimorphic), promargin with four fused teeth (distal one reduced), and retromargin with one tooth. Legs yellow to dark yellow with brown spots on distal portion. Leg formula: 1423. Tarsal claws small, not surpassing subungueal sulci. Inferior teeth of tarsal claws of equal size in males, and the distal one larger in females. Claw tufts poorly developed. Male palp: femur macrosetae 1d. RTA without lobes, sclerotized and sinuous ( Figs 5, 8 , 22, 26 , 31, 34 ). RvTA projected ventrally below the tegulum, with denticles (See arrow in Fig. 60 ) and a fold (angular or circular shape (See arrow in the Figs 5 , 21, 25 , 31 ). Cymbium suboval ( Figs 6 , 32 ), with a tuft of setae at the apex ( Fig. 32 ). Circular tegulum, oblique in relation to the cymbium middle line (axis). Embolus fixed to the tegulum, ribbonlike; embolar base dorso-prolateral, embolar path around the tegulum ( Figs 5, 7 , 21, 25 , 31 ). Male with epiandrous fusules (examined only in G. minuano ; Fig. 70 ). Epigyne: the epigynal plate is bilobed on posterior border, wider than long, with LPO ( Figs 14 , 24 ). Copulatory openings C-shaped, forming an atrium in the medial region of the epigyne ( Figs 13 , 23 ). In dorsal view, a chitinized plate covers half of the copulatory ducts (See arrow in the Figs 14 , 24 ). Copulatory ducts arranged in parallel and close to each other in the medial region, can be visualized in ventral view, through the atrium, and above the atrium ( Figs 13 , 23 ). The CD overlapping the spermathecae ( Fig. 24 ). Spermathecae kidney-shaped with the base of fertilization duct placed above spermathecae at anterior region of epigynum ( Fig. 24 ). Abdomen: dorsum yellow with brown chevrons (see arrow in the Figs 1 , 9 , 27 ); venter with a median longitudinal brown stripe of irregular contours; sides with brown longitudinal band ( Figs 3 , 11 , 29 ). Spinnerets ( Figs 71–76 ; examined only in G. minuano , male): PLS with about 11–12 aciniform spigots and some tartipores ( Figs 71–72 ); PMS with a single minor ampullate spigot (mAP) and three or four aciniform (ac) spigots ( Figs 73–74 ); ALS with one major ampullate spigot (MAP) and one reduced nubbin (n), surrounded by about 10–12 piriform (pi) spigots and some tartipores (ta) ( Figs 75–76 ). Coloration of spinnerets as in legs.

Distribution. Brazil [São Paulo, Paraná and Rio Grande do Sul], Uruguay [Montevideo and Rivera] and Argentina [Buenos Aires] ( Figs 77–78 ).

Natural history. Species were collected in arboreal and shrub microhabitats.

Composition. Two species: Guriurius minuano Marta, Bustamante, Ruiz & Rodrigues sp. nov. (type species) and Guriurius nancyae Marta, Bustamante, Ruiz & Rodrigues sp. nov.

Figures

FIGURES 1–8. Male of Guriurius minuano Marta, Bustamante, Ruiz & Rodrigues sp. nov. Habitus (MCTP 21675): 1 dorsal view, white arrow: chevrons coloration pattern, 2 ventral view; 3 lateral view; 4 face, frontal view; scale bars: 1.00 mm. Left male palp (MCN 32225): 5 ventral view, white arrow: RvTA angular axis; 6 dorsal view; 7 prolateral view; 8 retrolateral view, scale bars: 0.25 mm.

FIGURES 9–14. Female of Guriurius minuano Marta, Bustamante, Ruiz & Rodrigues sp. nov. Habitus (MCTP 40587): 9 dorsal view, white arrow: chevrons coloration pattern, 10 ventral view; 11 lateral view; 12 face, frontal view; scale bars: 1 mm. Epigyne female (MCTP 40587): 13 ventral view; 14 dorsal view, white arrow: dorsally chitinized plate, scale bars: 0.10 mm.

FIGURES 15–20. Photographs in vivo habitus Guriurius minuano Marta, Bustamante, Ruiz & Rodrigues sp. nov. (FCE-Ar 11639, 11740). 15, 17, 19 Male; 16, 18, 20 Female.

FIGURES 21–26. Genitalic ilustration of Guriurius Marta, Bustamante, Ruiz & Rodrigues gen. nov. Left male palp Guriurius minuano Marta, Bustamante, Ruiz & Rodrigues sp. nov. (MCN 32225): 21 ventral view, white arrow: RvTA angular axis; 22 retrolateral view, scale bars: 0.25 mm. Epigyne of G. minuano (MCTP 40587): 23 ventral view; 24 dorsal view, white arrow: dorsally chitinized plate, scale bars: 0.10 mm. Left male palp of Guriurius nancyae Marta, Bustamante, Ruiz & Rodrigues sp. nov. (MCN 30545): 25 ventral view, white arrow: RvTA rounded axis; 26 retrolateral view, scale bars: 0.25 mm.

FIGURES 27–34. Male of Guriurius nancyae Marta, Bustamante, Ruiz & Rodrigues sp. nov. Habitus (MCTP 30545): 27 dorsal view, white arrow: chevrons coloration pattern; 28 ventral view; 29 lateral view; 30 face, frontal view, scale bars: 0.50 mm. Left male palp: 31 ventral, white arrow: RvTA rounded axis; 32 dorsal; 33 prolateral 34 retrolateral view, arrow: RvTA rounded axis, scale bars: 0.25 mm.

FIGURES 59–64. Scanning electronic microscopy (SEM). Male palp of Guriurius minuano sp. nov. (MCTP 38993): 59 ventral view, arrow: tegulum depression; 60 ventral view, arrow: ventral surface RvTA. Male palp of At. segmentatus (MCN 36806): 61 ventral view; 62 detail of RvTA dorsal surface. Male palp of Si. gladifer (MCTP 31078): 63 ventral view, arrow: tegulum depression; 64 details of RvTA arrow: RvTA ventral surface.

FIGURE 65–70. Scanning electronic microscopy (SEM). Male of Si. gladifer (MCTP 31078): 65 carapace surface, 66 claw surface. Female of A. segmentatus (MCN 401182): 67 carapace surface, 68 epigyne ventral view. Subadult Guriurius minuano sp. nov. (MCN 32225): 69 carapace surface, 70 male epiandric spigots.

FIGURES 71–76. Male spinnerets of Guriurius minuano sp. nov. 71 posterior lateral spinnerets, left side; 72 right side; 73 posterior median spinnerets, left side; 74 right side; 75 anterior lateral spinnerets, left side; 76 right side.

FIGURES 77–78. Regionalization in Neotropical view (Morrone 2014) and distributional records for huriine jumping spiders (records of Urupuyu not included). 77 Neotropical, South America, Brazilian subregion Chacoan subregion, South America Transition Zone, Andean Region. 78 Southern of South America, Brazil, Uruguay, Argentina focusing on the distribution of Guriurius.

FIGURES 43–48. Female of Atelurius segmentatus. Habitus (MCN 36915): 43 dorsal view, white arrow: chevrons coloration pattern; 44 ventral view, white arrow: ventrally chitinized plate; 45 lateral view; 46 face, frontal view. Scale bars: 1 mm. Epigyne female 47 ventral; 48 dorsal. Scale bars: 0.10 mm.