Stenoterommata leticiae, Indicatti, Rafael P., Chavari, João L., Zucatelli-Júnior, Maurílio, Lucas, Sylvia M. & Brescovit, Antonio D., 2017

Indicatti, Rafael P., Chavari, João L., Zucatelli-Júnior, Maurílio, Lucas, Sylvia M. & Brescovit, Antonio D., 2017, Six new species of silk-lined burrow spider genus Stenoterommata Holmberg, 1881 (Araneae, Nemesiidae) from southern Brazil, Zootaxa 4254 (4), pp. 435-456 : 444-447

Stenoterommata leticiae sp. nov.

( Figs 5 , 44–48 )

Types. Male holotype from Parque Unipraias, Morro da Aguada , 240 m asl, 27°00’08.39’’S, 48°35’49.66’’W, Balneário Camboriú, Santa Catarina, Brazil, vi.2009 – v.2010, M. Zucatelli Júnior coll. (IBSP 166078). Paratypes: Parque Nacional da Serra do Itajaí, Setor Nascentes, ca. 350 m asl, 27°03’13.49’’S, 49°05’09.22’’W, Blumenau , Santa Catarina, Brazil, 14–20.i.2013, R.P. Indicatti & B. Gambaré coll., 1 female ( IBSP 166083 ) ; 27.vi– 07.vii.2014, R.P. Indicatti & B. Gambaré coll., 4 females ( IBSP 166201 ; 166202; MZSP 71754 ; FURB CH 687); Área de Relevante Interesse Ecológico do Salto, ca . 100 m asl, 26°53’14.4’’S, 49°06’10.6’’W, Blumenau , Santa Catarina, Brazil, 16.vii.2016, pitfall traps, B.G. Alves coll., 1 male ( FURB CH1224).

Additional material examined. BRAZIL, Santa Catarina: Blumenau (Parque Nacional da Serra do Itajaí, Setor Nascentes , ca. 350 m asl, 27°03’13.49’’S, 49°05’09.22’’W), 27.vi–07.vii.2014, R.P. Indicatti & B. Gambaré coll., 12 females ( IBSP 166203–166210 ).

Diagnosis. Males of S. leticiae sp. nov. resemble those of S. pavesii sp. nov. and S. gugai sp. nov. by the long embolus with thickened subapical area, but can be distinguished from them by the straighter apical end and by lacking a diagonal embolic tip ( Figs 44–46 ). Females resemble those of S. gugai sp. nov. by the spermathecal base anteriorly developed, covering the basal dome ( Figs 47, 48 ), but can be distinguished by the presence of an anterior projection where a receptaculum originate ( Figs 47, 48 ), and the abdomen without discernible dorsal chevrons ( Fig. 5 ).

Etymology. The specific name is a patronym in honor of Leticia Muraro Zucatelli, wife of the third author.

Description. Male (holotype). Color pattern in ethanol: carapace and legs reddish brown. Body with light pubescence, covered with golden setae. Abdomen dorsally brown with yellowish brown mottling, one large on anterior and other symmetrical along dorsum with no discernible chevron, and ventrally yellowish-brown, with four small posterior median spots group. Total length 15.52. Carapace 6.40 long, 5.22 wide, with short and procurved fovea. Abdomen 6.72 long, 3.70 wide. Thoracic region slightly raised. Clypeus narrow, 0.15. Eye tubercle weakly elevated, wider than long. Anterior eye row slightly procurved, posterior slightly recurved. Eye sizes: AME 0.40, ALE 0.30, PME 0.18 and PLE 0.26. Chelicerae with nine teeth in prolateral row, with ca. 30 basal smaller teeth and rastellum weak, formed by long thin setae. Intercheliceral tumescence large, pale yellow covered with few setae. Labium 0.40 long, 1.10 wide, with five cuspules. Maxillae with ca. 60 blunt cuspules on internal basal angle. Serrula developed. Sternum oval 3.20 long, 2.20 wide. Sternal sigilla small, granulate, marginal: anterior and median rounded, posterior oval-elongated, twice the size of anterior, away from margin by ca. 1/3 length. Palp: measurements: femur 3.11/ patella 1.50/ tibia 2.42/ cymbium 0.98/ total 8.01; spination: femur d0-0-1-1-2, tibia r1ap. Legs: measurements: I: femur 5.52/ patella 3.20/ tibia 4.50/ metatarsus 4.81/ tarsus 3.40/ total 21.43; II: 5.40/ 2.60/ 4.31/ 4.12/ 3.31/ 19.74; III: 4.60/ 2.21/ 3.31/ 4.40/ 2.12/ 16.64; IV: 6.21/ 2.40/ 5.50/ 6.32/ 3.01/ 23.45; spination: I: femur d1-1-1-0-1-1-1-2-1p, patella 0, tibia v1 r-0-2-(1r megaspine), p0-0-1-0, metatarsus v1 r-1r-0-0-1ap, p0-1-0-1, 0-0-1-0; II: femur d0-2p-1r-0-2-2-0, patella 0, tibia v1 p-1r-0-1r-1p-0-3ap, p0-1-0-1-0, metatarsus v0-1r-0-1r-0-0-2ap, p1-0-1-0-0-1, r0-0-1-0; III: femur d1p-2-2-2-0, patella p0-1-1-1, r0-0-1-0, tibia d0- 0-1-0, v2 -0-2-0-0-2ap, p0-1-0-1-0, r0-1-0-1-0, metatarsus d1r-0-1p-1p-0-0-2, v0-2-0-0-3ap, p1-0-0-1, r0-1-1-0-0; IV: femur d0-1-1-1p-1-2-2p, patella r0-0-1-0, tibia v2 -0-2-0-2ap, p0-1-0-1-0, r0-1-0-1-0, metatarsus d0-1p-1p-1r- 1p-0-0-2, v0-0-1p-2-0-1p-0-2-1p-3ap, r1-0-0-1-0-0-0. Metatarsal preening combs: III: 4VP, 4VR; IV: 3VP, 4VR. Tarsi I–IV flexible. Scopulae on tarsi I, II dense and symmetric, III, IV light. Scopulae on tarsi I, II undivided, III, IV divided by thin setae: III by six rows, IV by 10 rows. Scopulae on 1/5 of metatarsi I, II divided by five rows of setae, III, IV absent. STC large with double row of teeth: I–IV: 5–6. ITC on left tarsus IV and III, IV on right tarsi. Trichobothria and tarsal organ as in S. pavesii sp. nov. Four spinnerets: PLS: basal segment 1.10, median segment 0.80, apical segment triangular, 0.68 long. Spigots as in S. pavesii sp. nov. Palp: cymbium with thin setae, resembling tarsal scopulae setae; tibia long, narrow ( Figs 44, 46 ) and with shallow ventral excavation ( Figs 44, 46 ); tibial excavation and basal region of tegulum ( Fig. 45 ) with weak grooves, suggesting possible stridulatory apparatus; bulb piriform with five parallel keels ( Figs 45, 46 ).

Female (paratype IBSP 166201). Color pattern in ethanol and in living specimen as in male ( Fig. 5 ). Total length 19.67. Carapace 6.98 long, 5.78 wide, with short and procurved fovea ( Fig. 5 ). Abdomen 9.51 long, 5.30 wide. Thoracic region slightly raised. Clypeus narrow, 0.30 ( Fig. 5 ). Eye tubercle weakly elevated, wider than long. Anterior eye row procurved, posterior recurved. Eye sizes: AME 0.35, ALE 0.37, PME 0.22 and PLE 0.30. Chelicerae with eight teeth in prolateral row, with ca. 50 basal smaller teeth and rastellum weak, formed by long thin setae. Labium 0.75 long, 1.30 wide, with two cuspules. Maxillae with ca. 80 blunt cuspules on internal basal angle. Serrula absent. Sternum oval 3.84 long, 3.61 wide. Sternal sigilla as in male. Palp: measurements: femur 3.80/ patella 2.00/ tibia 2.41/ tarsus 2.30/ total 10.51; spination: tibia v0-0-2, p0-1-0, tarsus v1 r-0-0-0. Legs: measurements: I: femur 5.41/ patella 3.50/ tibia 4.01/ metatarsus 3.40/ tarsus 2.11/ total 18.43; II: 4.82/ 3.20/ 3.30/ 2.82/ 2.10/ 16.24; III: 4.09/ 2.50/ 2.60/ 3.51/ 2.00/ 14.70; IV: 5.61/ 3.20/ 4.31/ 5.11/ 2.00/ 20.23; spination: I: metatarsus v0-1r-0-1ap; II: tibia p0-1r-1r-1r-2ap, metatarsus v0-1r-1r-2ap, p0-1-0; III: patella p0-1-1-1, tibia d0-0- 1-0, v0-1-0-2ap, p1-1-0, r0-1-0, metatarsus d1r-2-0-2-0-2, v0-2-0-2-0-3ap, p0-1-0-1-0-1-0, r0-0-1; IV: tibia v0-0- 2ap, r0-1-0-1-0, metatarsus d0-2-0-2-0-2, v0-2-0-1p-0-2-0-3ap, p0-1-0-1-0-1-0. Metatarsal preening combs: II: 6VP; III: 4VP, 6VR; IV: 2VP, 5VR. Tarsi I, II not flexible, rigid and III, IV flexible. Scopulae on tarsi I, II dense and symmetric, III, IV light. Scopulae on tarsi I undivided, II–IV divided by thicker setae: II by one row, III by six rows and IV by 10 rows. Scopulae on full length of metatarsi I, II, absent on III, IV. STC large with double row of teeth: I: 4, 5, 5, 5; II: 5, 6, 5, 5; III: 4, 5, 5, 3; IV: 3, 5, 5, 4. ITC on tarsus IV. Palpal claw with four teeth on promargin. Trichobothria and tarsal organ as in S. pavesii sp. nov. Four spinnerets: PLS: basal segment 0.90, median segment 0.70, apical segment triangular 0.65 long. Spigots as in S. pavesii sp. nov. Spermathecae with posterior diagonally-elongated basal dome with 3–4 receptacula on each side ( Figs 47, 48 ).

Variation. Males (n=2): total length 12.24–15.52; carapace 5.58–6.40 long; maxillae with 58–60 cuspules. Females (n=10): total length 13.80–20.20; carapace 5.90–7.70 long; maxillae with 68–80 cuspules.

Distribution. Southern Brazil, state of Santa Catarina.

Figures

FIGURES 1 – 6. Stenoterommata spp. from eastern Santa Catarina state, Brazil. 1, 3 – 6. Habitus. 1, 2. Stenoterommata pavesii sp. nov., female (IBSP 166059) from Parque Nacional da Serra do Itajaí (PNSI), Blumenau. 2. Spider burrow, frontal view. 3, 4. Stenoterommata gugai sp. nov. from Parque Municipal da Lagoinha do Leste, Santa Catarina Island, Florianópolis. 3. Male (IBSP 166213). 4. Female (IBSP 166212). 5. Stenoterommata leticiae sp. nov., female (IBSP 166201) from PNSI. 6. Stenoterommata pescador sp. nov., female (IBSP 166232) from Pântano do Sul, Santa Catarina Island, Florianópolis. Photos: R. P. Indicatti.

FIGURES 41 – 48. Stenoterommata spp. 41 – 43. Stenoterommata peri sp. nov., male holotype, left palpal bulb. 41. prolateral view. 42. Dorsal view. 43. Retrolateral view. 44 – 48. Stenoterommata leticiae sp. nov. 44 – 46. Male holotype, left palpal bulb. 44. Prolateral view. 45. Dorsal view. 46. Retrolateral view. 47, 48. Female, spermathecae, paratype IBSP 166201. 47. Dorsal view. 48. Frontal view. Abbreviations: ap = anterior projection of the basal dome; bd = spermathecal basal dome; du = receptaculum duct; r = receptaculum; sb = spermathecal base. Scale bars: 1 mm.