Sparianthis boraris, Rheims, 2020

Rheims, Cristina A., 2020, Revision of the spider genus Sparianthis Simon, 1880 (Araneae, Sparassidae Sparianthinae), Zootaxa 4890 (2), pp. 151-191: 159-161

publication ID

https://doi.org/10.11646/zootaxa.4890.2.1

publication LSID

lsid:zoobank.org:pub:5EF7FF4A-0857-415F-B30F-DA2910F5B6EB

DOI

http://doi.org/10.5281/zenodo.4333418

persistent identifier

http://treatment.plazi.org/id/4E338797-8728-FFFB-D8E9-7AF9FC0FF9F0

treatment provided by

Plazi

scientific name

Sparianthis boraris
status

sp. nov.

Sparianthis boraris   sp. nov.

Figs 17–31 View FIGURES 17–20 View FIGURES 21–25 View FIGURES 26–31 , 144 View FIGURES 143–144

Type material. Holotype: ³ from Brazil, Pará, Santarém, Altér do Chão [-2.5000, -54.9500], Carapiranga 2, 15 July 2007, M.L.N. Sirotheau leg. ( MPEG 30633 View Materials ) GoogleMaps   . Paratypes: 1³, same locality as holotype, 22 June 2007, B.J.F. Silva leg. ( MPEG 30635 View Materials ); 1♀ GoogleMaps   , same locality as holotype, Anisio , 26 June 2007, E. Borari leg. ( MPEG 30639 View Materials ); 1³ GoogleMaps   , same locality as holotype, Caratinga , 27 June 2007, E. Borari leg. ( IBSP 258329 View Materials ); 1♀ GoogleMaps   , same locality as holotype, São Luis , 2 July 2007, E. Borari leg. ( MPEG 30636 View Materials ); 1♀ GoogleMaps   , Brazil, Pará, Aveiro, Margem do Rio Mamuru, Comuni-dade Cataueré (-3.4135, -56.4065), 26 September 2009, R. R. dos Santos leg. ( IBSP 258330 View Materials ) GoogleMaps   .

Additional material examined. BRAZIL: Pará: 1♀, Juruti, Vista Bela , pista de Pouso (-3.1167, -56.5852), 2 October 2009, N.F. Lo Man Hung leg. ( MPEG 15792 View Materials ) GoogleMaps   ; 1♀, Santarém, Altér do Chão, Paraíso [-2.5000, -54.9500], 17 July 2007, B.J.F. Silva leg. ( MPEG 30630 View Materials ) GoogleMaps   .

Etymology. The specific name refers to the Boraris indigenous community, that inhabited the region of Altér do Ch ã o until the early 18 th century; noun in apposition.

Diagnosis. Males of S. boraris   sp. nov. resemble those of S. megalopalpa   by the palp with mRTA as long as vRTA and longer than dRTA ( Figs 28 View FIGURES 26–31 , 116 View FIGURES 114–116 ). They are distinguished from the latter species by vRTA bifid in retrolateral view, with one branch short and blunt and the other longer and conical, and mRTA long, sharply pointed in ventral view and rectangular in retrolateral view (vRTA single branched, conical and mRTA bifid, with two truncated branches in retrolateral view in S. megalopalpa   ) ( Figs 27–28 View FIGURES 26–31 ). Females resemble those of S. caracarai   sp. nov. and S. ravida   by the epigyne with anterior atrium smooth, as long as wide or slightly longer than wide ( Figs 29 View FIGURES 26–31 , 36 View FIGURES 32–38 , 140 View FIGURES 137–142 ). They are distinguished from S. caracarai   sp. nov. by anterior atrium larger than median septum and vulva with first turn anteriad (anterior atrium smaller than median septum and first turn mediad in S. caracarai   sp. nov.), and from S. ravida   by median septum widest anteriorly and vulva with spermathecae elongate (median septum widest posteriorly and spermathecae rounded in S. ravida   ) ( Figs 29–31 View FIGURES 26–31 ).

Description. Male (holotype): Prosoma brown, darker at eye area, with thin, darker brown lines along thoracic striae; fovea brown; eye borders black. Chelicerae brown, darker than prosoma. Legs and palps lighter than prosoma. Labium and endites brown, distally pale yellowish brown. Sternum brownish cream colored with darker margins. Opisthosoma pale grey; dorsally with brownish gray pattern of irregular elongate marks laterally, few spots around cardiac mark area and one chevron, one triangle and three smaller chevrons down posterior half; ventrally with few irregular marks laterally on posterior half and slender V-shaped lines of muscle sigilla along the entire length of ventral opisthosoma ( Figs 17–18 View FIGURES 17–20 ). Total length 9.0. Prosoma: 4.4 long, 3.6 wide. Opisthosoma: 4.2 long, 2.6 wide. Eyes: diameters: 0.30, 0.22, 0.16, 0.23; interdistances: 0.21, 0.10, 0.50, 0.25, 0.15, 0.09. Legs (1243): I: 13.6 (3.8, 1.9, 3.5, 3.6, 0.8); II: 12.9 (3.8, 1.9, 3.3, 3.1, 0.8); III: 10.0 (3.2, 1.5, 2.2, 2.4, 0.7); IV: 12.6 (3.7, 1.5, 2.8, 3.6, 1.0). Spination follows the generic pattern. Metatarsi III–IV with ventral distal preening combs. Palp: tibia with prolateral spines short; cymbium with one strong prolateral spine; tegulum with retro-proximal protrusion; TBE squared with apical projection short and laminar; TBC wide, keel-like; embolus slender, with no projections, running distally and curving ventral-proximately at the distal margin of alveolus ( Figs 21–23 View FIGURES 21–25 , 26–28 View FIGURES 26–31 ).

Description. Female (paratype, MPEG 30369): Coloration pattern generally lighter than male. Prosoma with fovea barely conspicuous and no lines along thoracic striae. Opisthosoma dorsally with irregular marks laterally, faint smudged area around cardiac mark, one median chevron and three median triangles down posterior half; ventrally with few scattered spots laterally on posterior half and no visible muscle sigilla ( Figs 19–20 View FIGURES 17–20 ). Total length 10.1. Prosoma: 4.8 long, 3.8 wide. Opisthosoma: 5.1 long, 3.4 wide. Eyes: diameters: 0.32, 0.24, 0.18, 0.24; interdistances: 0.25, 0.15, 0.55, 0.35, 0.17, 0.09. Legs (2143): I: 13.7 (4.0, 2.1, 3.7, 3.2, 0.7); II: 13.8 (4.3, 2.2, 3.4, 3.21, 0.7); III: 10.4 (3.5, 1.7, 2.2, 2.4, 0.6); IV: 13.2 (4.1, 1.5, 2.9, 3.7, 1.0). Spination follows the generic pattern. Metatarsi III–IV with ventral distal preening combs. Epigyne: epigynal field rectangular, slightly longer than wide; anterior atrium squared, as long as wide; median septum 1.5 times longer than wide, with posterior margin rounded ( Figs 24 View FIGURES 21–25 , 29 View FIGURES 26–31 ). Vulva: internal ducts slender, half spermathecae width; glandular projection rounded, arising from duct at first turn ( Figs 25 View FIGURES 21–25 , 30–31 View FIGURES 26–31 ).

Variation. Males (n = 3): total length 9.0–10.0; prosoma length 4.4–4.6; femur I length 3.8–4.3. Females (n = 5): total length 9.0–12.6; prosoma length 4.3–5.0; femur I length 3.4–4.2.

Distribution. Known from Brazil, western state of Pará ( Fig. 144 View FIGURES 143–144 ).

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Departamento de Geologia, Universidad de Chile