Arctosa mineira, Paredes-Munguía & Brescovit & Teixeira, 2024
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publication ID |
https://doi.org/ 10.11646/zootaxa.5414.1.1 |
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publication LSID |
lsid:zoobank.org:pub:3B1DFADA-C20E-473B-A5E9-843548B54AD3 |
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persistent identifier |
https://treatment.plazi.org/id/03E887D2-BA11-FE32-FDDB-FF196401FE03 |
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treatment provided by |
Plazi |
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scientific name |
Arctosa mineira |
| status |
sp. nov. |
Arctosa mineira sp. nov.
Figs 2e View FIGURE 2 , 22‒23 View FIGURE 22 View FIGURE 23 , 66 View FIGURE 66
Type material. Female holotype from Parque Nacional da Serra do Cipó , 19°37'S 43°21'W, 21–27.vii.2002, Jaboticatubas, Minas Gerais, Brazil, E.S.S. Álvares leg. ( UFMG 6319 View Materials ) GoogleMaps .
Etymology. The species epithet refers to people native from the Brazilian state of Minas Gerais.
Diagnosis. Arctosa mineira sp. nov. can be distinguished from all other members of the genus by the extremely reduced transversal and median septa (MS, Figs 22a View FIGURE 22 , 23b View FIGURE 23 ), and head of spermatheca piriform, with vulval chamber as large as the head of spermatheca (HS, Figs 22d View FIGURE 22 , 23b View FIGURE 23 ).
Description. Male. Unknown.
Female. Holotype (UFMG 6319). Carapace brown covered by white, short, and black bristles except into the irregular yellow longitudinal median band. Sternum yellow longer than wide, covered by short black bristles abundant in the marginal area and sparsely covered in the central area ( Fig. 23c View FIGURE 23 ). Ocular area black and the cephalic portion of the prosoma covered by sparse large black bristles ( Fig. 23a View FIGURE 23 ); four long black bristles on the clypeal condyle anterior to AER. First row of eyes straight, shorter than the second row; AME slightly larger than the ALE; PME separated by a length greater than their radii. Chelicerae brown covered frontally with long brown hairs and the rest of it by long white hairs; chillum conspicuous and membranous, divided with the mesial portion sclerotized; condyle notorious and clearer than the chelicerae; endites light brown and convergent; labium darker than the endites; both endites and labium yellowish in their distal portion. All segments of legs yellow except on tarsi which are darker; annuli on all portions of legs except on tarsi ( Fig. 23a View FIGURE 23 ). Opisthosoma all covered by tiny white bristles, the dorsum is olive and covered by tiny black large bristles; cardiac mark absent; venter yellow sparsely covered by black bristles; spinnerets yellow; anterior spinnerets and posterior spinnerets cylindrical and equal in size.
Epigyne ( Figs 22 View FIGURE 22 , 23b, d View FIGURE 23 ), median septum square covered by white bristles, transversal septum thin and less noticeable; the atrium is absent. Copulatory opening is located at the intersection of both septa. In the dorsal view, the fertilization duct is membranous, curved, and thin. ( Figs 22b, c View FIGURE 22 ). The head of spermatheca are notoriously piriform and large; the stalk is narrow than the head of spermatheca and curved directing outwards; vulval chamber ventrally directed visible in apical view ( Fig. 22d View FIGURE 22 ), rounded and as bigger than the head of spermatheca ( Fig 22b View FIGURE 22 ).
Leg formula IV>I>II>III. Spination pattern: femur I p 0-0-1 d 1-1-1, II p 0-0-1 d 1-1-1 r 0-0-d1, III p 0-d1-d1 d 1- 1-1 r 0-d1-d1, IV p 0-0-d1ap d 1-1-1 r 0-0-d1ap; patella I p 1 d 1-ap(1 bristle), II p 1 d 1-ap(1 bristle), III p 1 d 1bristle- 1ap r 1, IV p 1 d 1 bristle-1ap r 1; tibia I p 2-1 d 1 bristle-1 bristle v 2-1-2ap r 0-0-1, II p d1-1 d 1bristle v 1-1-2ap, III p 1-v1 d r1-1 r 1-1 v 2-1-2ap, IV p 1-d1 d 1-1 r 1-1 v 2-2-2ap; metatarsus I p 0-2-2 r 0-2-2 d 1bristle-1bristle v 2-0-1ap, II p 0-2-2 d 1bristle-1bristle r 1-2-2 v 2-0-1ap, III p d1-d1-2 d 1bristle-1bristle r d1-1-2 v 2-2-1ap, IV p 0-0-1-1-2ap d 0-r1-1ap r 1-1-1-4ap v 1-p1-r1-0-0-r1-p1-2ap.
Measurements: TL 6.25, CL 3.25, CCW 2.00, CTW 2.50, CCH 1.20, CTH 1.24. Eyes: AME 0.14, ALE 0.12, PME 0.28, PLE 0.24, interdistances:AME-AME 0.24; AME-ALE 0.04; PME-PME 0.24; PME-PLE 0.30; PLE-PLE 0.56. POQ long 0.56, POQ posterior width 0.80, POQ anterior width 0.50. Chelicerae: 1.50 length. Opisthosoma: length 1.72, width 0.52. Legs: (femur + patella+tibia + metatarsus + tarsus = total length): pedipalp 1.10 + 0.60 + 0.70 - + 0.80 = 3.26, I 2.06 + 1.00 + 1.60 + 1.70 + 1.06 = 8.68, II 1.90 + 0.98 + 1.46 + 1.62 + 1.00= 8.12, III 1.84 + 0.94 + 1.36 + 1.88 + 1.02 = 7.69, IV 2.52 + 1.10 + 2.00 + 2.74 + 1.34 = 10.91.
Distribution. Known only for the type locality ( Fig. 66 View FIGURE 66 ).
Natural history. The female holotype was collected with a two-valved egg sac, which is covered by a thin layer of silk ( Fig. 23f View FIGURE 23 ).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.