Stenoterommata pavesii, 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: 437-442

publication ID

https://doi.org/10.11646/zootaxa.4254.4.2

publication LSID

lsid:zoobank.org:pub:3F71E7F2-F9AB-4982-A5B9-D7D00A30A015

persistent identifier

http://treatment.plazi.org/id/03E687AF-FFF8-D75F-FF05-FE01A5339F2E

treatment provided by

Plazi

scientific name

Stenoterommata pavesii
status

sp. nov.

Stenoterommata pavesii   sp. nov.

( Figs 1, 2 View FIGURES 1 – 6 , 7–11 View FIGURES 7 – 16 , 17–40 View FIGURES 17 – 28 View FIGURES 29 – 40 )

Types. Male holotype from 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, 27.vi –07.vii.2014, R.P. Indicatti & B. Gambaré coll., IBSP 166231 View Materials GoogleMaps   . Paratypes: same data as holotype, 14–20.i.2013, 3 females ( IBSP 166059 View Materials ; 166060; MCN 49773 View Materials ); Pousada Rio da Prata, Trilha Fria, 210 m asl, 27°01’47,97’’S, 49°05’38,73’’W, Nova Russia, Blumenau , Santa Catarina GoogleMaps   , Brazil, 6–10.vii.2009, R.P. Indicatti & B. Gambaré coll., 1 female ( IBSP 166061 View Materials ); 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 CH810); Parque Natural Municipal Bromberg , ca GoogleMaps   . 150 m asl, 26°53’35.6’’S, 49°06’38.8’’W, Blumenau , Santa Catarina GoogleMaps   , Brazil, 16.iv.2016, pitfall traps, B.G. Alves coll., 1 male ( FURB CH797); Parque Unipraias, Morro da Aguada, 240 m asl, 27°00’08.39’’S, 48°35’49.66’’W, Balneário Camboriú , Santa Catarina GoogleMaps   , Brazil, vi.2009   – v.2010, pitfall traps, M. Zucatelli Jr. coll., 2 males (IBSP 166063; 166064); 1 female (IBSP 166065); 5 males ( FURB CH 689; MCN 49772 View Materials ; MCTP 37542 View Materials ; MNRJ 6995 View Materials ; MZSP 66207 View Materials )   ; 24–27.viii.2014, R.P. Indicatti, J.L. Chavari, M. Zucatelli Jr. & Y. Lemos coll., 1 female (IBSP 166217).

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), 14–20.i.2013, R.P. Indicatti & B. Gambaré coll., 1 female ( IBSP 166062 View Materials ) GoogleMaps   ; 27.vi –07.vii.2014, R.P. Indicatti & B. Gambaré coll., 2 females ( IBSP 166229 View Materials ; 166230); ( Parque Natural Municipal Bromberg , ca. 150 m asl, 26°53’35.6’’S, 49°06’38.8’’W) GoogleMaps   , 16.iv.2016, pitfall traps, B.G. Alves coll., 1 male ( FURB CH 796)   ; 16.vii.2016, 1 male ( FURB CH 1179); ( Parque Natural Municipal São Francisco de Assis , ca. 50 m asl, 26°55’15.7’’S, 49°04’32.0’’W) GoogleMaps   , 15.iv.2016, pitfall traps, B.G. Alves coll., 1 male ( FURB CH 1175); Balneário Camboriú (Morro da Aguada, Parque Unipraias , 240 m asl, 27°00’08.39’’S, 48°35’49.66’’W) GoogleMaps   , vi.2009 – v.2010, pitfall traps, M. Zucatelli Jr. coll., 15 males, 2 juveniles (IBSP 166066–166077); 24–27.viii.2014, R.P. Indicatti, J.L. Chavari, M. Zucatelli Jr. & Y. Lemos coll., 3 females (IBSP 166216; 166218; 166222).

Diagnosis. Males of Stenoterommata pavesii   sp. nov. differ from those other congeners by the male palpal bulb with wider and ventrally curved embolus ( Figs 7, 9 View FIGURES 7 – 16 ). Females resemble those of S. uruguai Goloboff, 1995   , S. quena Goloboff, 1995   , S. arnolisei Indicatti et al., 2008   , S. grimpa Indicatti et al., 2008   and S. gugai   sp. nov. by the spermathecae with wider basal dome ( Fig. 10 View FIGURES 7 – 16 ). It can be distinguished from the abovementioned species by the triangular basal dome in frontal view ( Fig. 11 View FIGURES 7 – 16 ) and shorter ducts of the receptacula ( Fig. 10 View FIGURES 7 – 16 ).

Etymology. The specific name is a patronym in honor of Mário Pavesi, who has worked towards the conservation of the Parque Nacional da Serra do Itajaí in the Nova Russia region, Blumenau, state of Santa Catarina, Brazil.

Description. Male (holotype). Color pattern in ethanol: carapace and femora I –IV brown, patellae –tarsi yellowish brown. Body with light pubescence ( Fig. 24 View FIGURES 17 – 28 ), covered with golden setae. Abdomen dorsally brownish yellow with brown mottling forming discrete chevron and ventrally yellowish-brown, with two small posterior lateral spots. Total length 12.82. Carapace 5.92 long, 4.51 wide, with short and procurved fovea ( Fig. 27 View FIGURES 17 – 28 ). Abdomen 5.40 long, 3.32 wide. Thoracic region slightly raised. Clypeus narrow, 0.10 ( Fig. 25 View FIGURES 17 – 28 ). Eye tubercle weakly elevated, wider than long. Anterior eye row slightly procurved, posterior recurved ( Figs 24, 25 View FIGURES 17 – 28 ). Eye sizes: AME 0.32, ALE 0.34, PME 0.22 and PLE 0.24. Chelicerae with eight teeth in prolateral row, with ca. 30 basal smaller teeth and rastellum weak, formed by long thin setae ( Fig. 29 View FIGURES 29 – 40 ). Intercheliceral tumescence small, pale yellow, covered with few setae ( Figs 26, 27 View FIGURES 17 – 28 ). Labium 0.45 long, 1.02 wide, with no cuspules. Maxillae with ca. 70 pointed and elongated cuspules ( Figs 29, 30 View FIGURES 29 – 40 ) on internal basal angle. Serrula developed ( Fig. 28 View FIGURES 17 – 28 ). Sternum oval 3.12 long, 2.41 wide. Sternal sigilla small, granulate, marginal: anterior and median rounded, posterior ovalelongated, three times size of anterior, away from margin by ca. 1/3 length ( Fig. 31 View FIGURES 29 – 40 ). Palp: measurements: femur 2.69/ patella 1.10/ tibia 2.12/ cymbium 0.80/ total 6.71; spination: femur d0-0-0-1-1p-2-1, tibia r1ap. Legs: measurements: I: femur 5.01/ patella

2.59/ tibia 3.70/ metatarsus 3.52/ tarsus 3.00/ total 17.82; II: 4.22/ 2.20/ 3.31/ 3.30/ 2.93/ 15.96; III: 4.22/ 2.29/ 3.20/ 4.12/ 2.60/ 16.43; IV: 5.49/ 2.31/ 4.70/ 6.12/ 2.92/ 21.54; spination: I: femur d1-1-1r-1-2-2-0, patella p0-0-1, tibia v0-1r-0-1r-1-0-(1r megaspine, Fig. 32 View FIGURES 29 – 40 ), p0-1p-0-1p-0, metatarsus v2 ap, p0-1-0-1; II: femur d0-1-2-0-2-1p-1r, patella p0-0-1, tibia v1 p-1r-0-1r-0-3ap, p0-1-0-1-0, metatarsus d0-0-1p-0, v0-0-1r-1r-1-0-2ap, p0-1p-0-1p-0-1p, r0- 0-1-0; III: femur d0-1-1-0-1-1r-1r-1p-0, patella p0-1-1-1-0, r0-1-0, tibia d0-0-1, v2 -0-1r-0-2ap, p0-1-0-1-0, r0-1-0- 1-0, metatarsus d1r-0-1p-0-1p-0-0-2, v0-2-0-1r-1p-1ap, p0-1r-0-1r-0-1, r0-1-0-1-0-1; IV: femur d0-1-1-0-1-1r-1r- 1p-0, patella r0-0-1, tibia v4 -0-2-0-0-3ap, p0-1-0-1-0, r0-1s-0-1-0, metatarsus d0-1r-0-1p-0-0-0-1p-2, v0-1p-1r-0- 0-1p-1r-1p-1ap, r0-1-1-1-0-1-0. Metatarsal preening combs: II: 4VP thin setae; III: 4VP, 3VR; IV: 5VP, 4VR. Tarsi I –IV flexible. Scopulae on tarsi I, II dense ( Figs 35–37 View FIGURES 29 – 40 , tarsus I) and symmetric, III, IV light. Scopula on tarsi I undivided, II –IV divided by thin setae: II by one row, III by four rows and IV by six 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 ( Fig. 37 View FIGURES 29 – 40 ): I: 9 in each row; II and IV: 10 in each row; III: 8, 9, 9, 8. ITC on tarsus IV. Trichobothria with rounded, elevated bases with ca. 25 ridges ( Fig. 34 View FIGURES 29 – 40 ). Tarsal organ oval, slightly elevated with 4–5 concentric ridges ( Fig. 33 View FIGURES 29 – 40 ). Four spinnerets: PLS: basal segment 1.26, median segment 0.84, apical segment triangular 0.48 long ( Fig. 38 View FIGURES 29 – 40 ); PMS with pumpkiniform spigots ( Fig. 39 View FIGURES 29 – 40 ); PLS with dense and enlarged pumpkiniform spigots along inner edge on all segments ( Fig. 40 View FIGURES 29 – 40 ).

Palp: cymbium with thin setae, resembling tarsal scopulae setae; tibia long, narrow ( Figs 7, 9 View FIGURES 7 – 16 ) and with shallow ventral excavation ( Figs 7, 9 View FIGURES 7 – 16 , 20 View FIGURES 17 – 28 ); tibial excavation ( Fig. 23 View FIGURES 17 – 28 ) and basal region of tegulum ( Figs 17, 20 View FIGURES 17 – 28 ) with grooves, suggesting possible stridulatory apparatus; bulb piriform with six parallel keels ( Figs 8 View FIGURES 7 – 16 , 19, 21, 22 View FIGURES 17 – 28 ).

Female (paratype IBSP 166059). Color pattern and pubescence in ethanol, as in male. In living specimen: carapace and femora I –IV dark-brown ( Figs 1, 2 View FIGURES 1 – 6 ). Total length 18.89. Carapace 7.19 long, 5.19 wide, with short and procurved fovea ( Fig. 1 View FIGURES 1 – 6 ). Abdomen 8.11 long, 4.09 wide. Thoracic region slightly raised. Clypeus narrow, 0.25 ( Fig. 1 View FIGURES 1 – 6 ). Eye tubercle weakly elevated, wider than long. Anterior eye row procurved, posterior recurved. Eye sizes: AME 0.32, ALE 0.36, PME 0.24 and PLE 0.35. Chelicerae with eight teeth in prolateral row, with ca. 30 basal smaller teeth and rastellum weak, formed by long thin setae. Labium 0.80 long, 1.42 wide, with no cuspules. Maxillae with 90 blunt cuspules on internal basal angle. Serrula absent. Sternum oval 3.81 long, 3.40 wide. Sternal sigilla as in male. Palp: measurements: femur 4.12/ patella 2.31/ tibia 2.49/ tarsus 2.10/ total 11.03; spination: tibia v2 -0-3-4ap, p0-1-0, r0-0-1ap. Legs: measurements: I: femur 5.39/ patella 3.50/ tibia 3.80/ metatarsus 3.02/ tarsus 2.52/ total 18.24; II: 4.10/ 3.00/ 3.01/ 2.72/ 2.10/ 14.93; III: 4.10/ 2.60/ 2.51/ 3.22/ 2.01/ 14.44; IV: 6.02/ 3.20/ 4.51/ 5.02/ 2.51/ 21.26; spination: I: metatarsus v0-1-0-2ap; II: tibia p0-0-1-0, metatarsus v0-1-1-0, p0-1-0; III: patella p0-1-1-1-0, r0-1-0, tibia d0-0-1-0, v0-0-2ap, p0-1-1-0, r0-1-0, metatarsus d0-1-2-2-2, v0-2-2-1p-3ap, p1-1-1, r0-0- 1; IV: femur patella r0-1-0, tibia v0-0-2ap, r0-1-0-1-0, metatarsus d0-2-0-2-0-2, v0-2-0-2-3ap, p0-1-0-1-0-1-0, r0- 1-0-1-0. Metatarsal preening combs: II: 3VP, 6VR; III: 10VP, 10VR; IV: 4VP, VR5. Tarsi I –IV 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 four rows, III and IV by 10 rows. Scopulae on 3/4 of metatarsi I, II divided by thicker setae: I by two rows, II by five rows. Scopulae on metatarsi III, IV absent. STC large with double row of teeth: I –III: 4–5; IV: 4, 4, 6, 4. ITC on tarsus IV. Palpal claw with four teeth on promargin. Trichobothria and tarsal organ as in male. Four spinnerets, PLS: basal segment 1.52, median segment 1.10, apical segment triangular 0.62 long ( Fig. 1 View FIGURES 1 – 6 ). Spigots as in male. Spermathecae with 2–3 receptacula on each side ( Figs 10, 11 View FIGURES 7 – 16 ).

Variation. Males (n=12): total length 12.35–14.34; carapace 5.11–6.34 long; maxillae with 67–78 cuspules. Females (n=7): total length 15.30–18.89; carapace 5.80–5.91 long; maxillae with 80–107 cuspules.

Distribution. Southern Brazil, state of Santa Catarina.

IBSP

Instituto Biologico de Sao Paulo

MCN

McNeese State University

FURB

Universidade Regional de Blumenau

MCTP

Museu de Ciencias

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

STC

Sichuan Teacher's College

ITC

International Transit Centre

PMS

Prirodonamen Muzej Skopje