Stenoterommata gugai, 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 : 442-444

Stenoterommata gugai sp. nov.

( Figs 3, 4 , 12–16 )

Types. Male holotype from Parque Municipal Lagoa do Peri , 20 m asl, 27°43'26.10"S, 48°30'29.07"W, Santa Catarina Island, Florianópolis , Santa Catarina , Brazil, vii–viii.2007, pitfall traps, M.I.M. Hernández coll. ( IBSP 117357 ) . Paratypes: same data as holotype, 1 male ( IBSP 166079 ) ; i–iii.2012, pitfall traps, A.L. Trivia & A. Chagas Jr. coll., 1 female ( IBSP 166081 ); Parque Municipal da Lagoinha do Leste, 120 m asl, 27°46'45.53"S, 48°30'07.86"W, Santa Catarina Island, Florianópolis , Santa Catarina , Brazil, 27–31.viii.2014, R.P. Indicatti, J.L. Chavari & Y. Lemos coll., 1 female ( IBSP 166212 ) ; 1 male (IBSP 166213).

Additional material examined. BRAZIL, Santa Catarina: Florianópolis, Santa Catarina Island ( Parque Municipal da Lagoa do Peri , 20 m asl, 27°43'26.10"S, 48°30'29.07"W), vii–viii.2007, pitfall traps, M.I.M. Hernández coll., 1 male ( IBSP 166080 ) ; i–iii.2012, pitfall traps, A.L. Trivia & A. Chagas Jr. coll., 1 female (IBSP 166082); (Parque Municipal da Lagoinha do Leste, 120 m asl, 27°46'45.53"S, 48°30'07.86"W), 27–31.viii.2014, R.P. Indicatti, J.L. Chavari & Y. Lemos coll., 2 females (IBSP 166214; 166215); (Parque Municipal da Lagoinha do Leste, 40 m asl, 27°47'16.30"S, 48°30'25.30"W), 4–12.i.2015, R.P. Indicatti & B. Gambaré coll., 1 female, 1 juvenile (IBSP 166485).

Diagnosis. Males of S. gugai sp. nov. resemble those of S. peri sp. nov. in the long bulb keels ( Figs 12–14 ), but can be distinguished by the retrolateral keel being ca. half the length of the bulb ( Fig. 14 ) with a triangular apex and diagonal embolus tip ( Figs 12, 14 ). Females resemble those of S. leticiae sp. nov. by the spermathecal base being anteriorly developed, covering the basal dome ( Figs 15, 16 ), but can be distinguished by the absence of an anterior projection where a receptaculum originates ( Figs 15, 16 ), and the abdomen with discernible dorsal chevron ( Fig. 4 ).

Etymology. The specific name is a patronym in honor of Gustavo Kuerten, known by the nickname, Guga. He is a retired former professional tennis player who was born in Florianópolis, Santa Catarina, Brazil. He won several tournaments, among them, three Grand Slam/Roland Garros, one Masters Cup and five Masters Series. In 2000, he reached the No. 1 position in world ranking of Association of Tennis Professionals. He has received honors from several institutions related to tennis and social activities.

Description. Male (holotype). Color pattern in ethanol: carapace and femora I–IV brown, patellae–tarsi yellowish brown. Body with light pubescence ( Fig. 3 ), covered with golden setae. Abdomen dorsally brownish yellow with brown mottling forming discrete chevron ( Fig. 3 ) and ventrally yellowish brown. In living specimen: body and leg pubescence covered with pinkish setae, and all segments darker ( Fig. 3 ). Total length 12.79. Carapace 5.67 long, 4.38 wide, with short, procurved fovea ( Fig. 3 ). Abdomen 5.42 long, 3.41 wide. Thoracic region slightly raised. Clypeus narrow, 0.10 ( Fig. 3 ). Eye tubercle weakly elevated, wider than long. Anterior eye row slightly procurved, posterior recurved. Eye sizes: AME 0.26, ALE 0.30, PME 0.22 and PLE 0.24. Chelicerae with seven teeth in prolateral row, with ca. 30 basal smaller teeth and rastellum weak, formed by long thin setae. Intercheliceral tumescence small, pale yellow covered with few setae. Labium 0.45 long, 1.03 wide, without cuspules. Maxillae with ca. 55 pointed, elongated cuspules on internal basal angle. Serrula developed. Sternum oval 3.25 long, 2.32 wide. Sternal sigilla small, granulate, marginal: anterior and median rounded, posterior ovalelongated, twice size of anterior, separated from margin by ca. 1/2 length. Palp: measurements: femur 2.42/ patella 1.50/ tibia 2.02/ cymbium 0.93/ total 6.85; spination: femur d0-0-0-2, tibia 0-0-0-1. Legs: measurements: I: femur 4.73/ patella 2.90/ tibia 3.70/ metatarsus 3.41/ tarsus 2.80/ total 17.54; II: 4.20/ 2.30/ 3.30/ 2.92/ 2.41/ 15.13; III: 3.85/ 1.90/ 2.69/ 3.60/ 2.32/ 14.36; IV: 5.32/ 2.40/ 3.92/ 5.10/ 2.50/ 19.24; spination: I: femur d0-0-0-2-2, patella 0, tibia v0-1r-0-1r-0-2-0-(1r megaspine), p0-1-0-1, metatarsus v0-1-0-2ap, p0-1-0-1; II: femur d0-0-0-1p-2, patella 0, tibia v0-1r-0-1r-0-2ap, p0-1-0-1-0, metatarsus v0-1r-0-1r-0-0-2ap, p0-1-0-1-0-0-1; III: femur d0-2-2-2-0, patella p0-1-1-1, r0-0-1-0, tibia v2 -0-2-0-3ap, p1-0-1-0, r0-1-0-1-0, metatarsus d1r-2-0-2-0-2, v0-2-0-2-3ap, p0-1-0-1-0-1, r0-0-0-1; IV: femur d0-1-0-2-0-1r-2-2-0, patella r0-0-1-0, tibia v0-2-0-0-2-0-0-2ap, p0-1-0-1-0, r0-1-0-1-0, metatarsus d0-1r-0-1p-0-1r-1p-0-0-2, v0-0-2-1p-0-1-0-3ap, p0-1-0-1-0-1-0, r0-1-0. Metatarsal preening combs: III: 4VP, 5VR thin setae; IV: 5VP, 3VR. Tarsi I–IV flexible. Scopulae on tarsi I, II dense and symmetric, III, IV light. Scopulae on tarsi I–IV divided by thin setae: I, II by two rows, III by five rows and IV by seven rows. Scopulae on 1/5 of metatarsi I, II divided by six rows of setae, III, IV absent. STC large with double row of teeth: I: 5, 7, 7, 5; II: 6, 7, 7, 4; III: 5, 7, 6, 6; IV: 6, 6, 7, 6. ITC on tarsus IV (broken). Trichobothria and tarsal organ as in S. pavesii sp. nov. Four spinnerets: PLS: basal segment 0.96, median segment 0.82, apical segment triangular 0.62 long. Spigots as in S. pavesii sp. nov. Palp: cymbium with thin setae, resembling tarsal scopulae setae; tibia long, narrow ( Figs 12, 14 ) and with shallow ventral excavation ( Figs 12, 14 ); tibial excavation and basal region of tegulum ( Figs 12, 13 ) with grooves, suggesting possible stridulatory apparatus; bulb piriform with seven parallel keels ( Fig. 13 ).

Female (paratype IBSP 166212). Color pattern and pubescence in ethanol, as in male. In living specimen: carapace and femur I–IV dark-brown ( Fig. 4 ) and patella to the tarsus reddish-brown. Total length 17.93. Carapace 6.52 long, 5.21 wide, with short and procurved fovea ( Fig. 4 ). Abdomen 8.11 long, 5.31 wide. Thoracic region slightly raised. Clypeus narrow, 0.22. Eye tubercle weakly elevated, wider than long. Anterior eye row procurved, posterior recurved. Eye sizes: AME 0.30, ALE 0.32, PME 0.20 and PLE 0.30. Chelicerae with 8/9 teeth in prolateral row, with ca. 35 basal smaller teeth; rastellum weak, formed by long thin setae. Labium 0.70 long, 1.32 wide, with one pointed cuspule. Maxillae with ca. 105 blunt cuspules on internal basal angle. Serrula absent. Sternum oval 3.84 long, 3.02 wide. Sternal sigilla as in male. Palp: measurements: femur 3.02/ patella 1.90/ tibia 2.01/ tarsus 1.20/ total 8.13; spination: femur d0-0-0-1p, tibia v2-2 -0-3ap, p0-1-0, tarsus v1 r-0-0-0. Legs: measurements: I: femur 4.44/ patella 3.20/ tibia 3.02/ metatarsus 2.81/ tarsus 1.90/ total 15.37; II: 4.02/ 2.71/ 2.51/ 2.60/ 2.01/ 13.85; III: 3.41/ 2.30/ 2.02/ 2.90/ 1.71/ 12.34; IV: 5.02/ 2.81/ 3.42/ 4.41/ 2.01/ 17.67; spination: I: femur d0-0-0-1p, metatarsus v1 r-0-0-3ap; II: femur d0-0-0-1p, metatarsus v1 r-1r-1p-0-2ap; III: patella p0-1-1-1, r0-1-1-0, tibia d0-0-1, v2 ap, p0-1-1-0, r0-1-1-0, metatarsus d1r-1r-1p-0-2-0-2, v0-2-0-2-0-3ap, p1-1-1; IV: patella r0-0-1-0, tibia d0-1r-0-1r-0, v2 ap, p0-1-0, metatarsus d1r-1p-1r-2-0-2, v0-2-0-1p-2-3ap, p1-1-1. Metatarsal preening combs: II: 5VP; III: 5VP, 5VR; IV: 3VP, 4VR. Tarsi I–III not flexible, rigid. Scopulae on tarsi I, II dense and symmetric, III, IV light. Scopulae on tarsi I undivided, II–IV divided by thicker setae: II by three rows, III by four rows, IV by 10 rows. Scopulae on full length of metatarsi I, II: I undivided, II divided by one row of setae. Scopulae on metatarsi III, IV absent. STC large with double row of teeth: I: 4, 10, 10, 5; II: 5, 5, 5, 4; III: 4, 5, 5, 4; IV: 4, 6, 6, 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 0.65, median segment 0.95, apical segment triangular 0.55 long. Spigots as in S. pavesii sp. nov. Spermathecae with posterior diagonally-elongated basal dome with two receptacula on each side ( Figs 15, 16 ).

Variation. Males (n=3): total length 12.00–13.65; carapace 4.80–5.67 long; maxillae with 55–60 cuspules. Females (n=5): total length 12.90–17.93; carapace 5.00–6.52 long; maxillae with 90–105 cuspules. Spermathecae with 2–3 receptacula on each side.

Distribution. Southern Brazil, state of Santa Catarina, Santa Catarina Island.

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 7 – 16. Stenoterommata spp. 7 – 11. Stenoterommata pavesii sp. nov. 7 – 9. Male holotype, left palpal bulb. 7. prolateral view. 8. Dorsal view. 9. Retrolateral view. 10, 11. Female, spermathecae, paratype IBSP 166062. 10. Dorsal view. 11. Frontal view. 12 – 16. Stenoterommata gugai sp. nov. 12 – 14. Male holotype, left palpal bulb. 12. Prolateral view. 13. Dorsal view. 14. Retrolateral view. 15, 16. Female, spermathecae, paratype IBSP 166079. 15. Dorsal view. 16. Frontal view. Abbreviations: bd = spermathecal basal dome; du = receptaculum duct; e = palpal embolus; k = keels; r = receptaculum; rk = retrolateral keel with triangular apical end; sb = spermathecal base; tg = tegular grooves. Scale bars: 1 mm.