Stenoterommata sevegnaniae , 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: 447-450

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-FFF6-D757-FF05-FD5FA26E9A7E

treatment provided by

Plazi

scientific name

Stenoterommata sevegnaniae
status

sp. nov.

Stenoterommata sevegnaniae  sp. nov.

( Figs 49–53View FIGURES 49 – 55)

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, 18.v.2004GoogleMaps  – 28.ii.2005, R.C. Francisco coll. (IBSP 114758). Paratypes: same data as holotype, 1 female ( IBSPAbout IBSP 114756View Materials)GoogleMaps  ; 1 male (IBSP 114753); 4 males ( FURBAbout FURB CH 1863; MZSPAbout MZSP 66208View Materials; MCNAbout MCN 49774View Materials; MCTPAbout MCTP 37543View Materials)  .

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), 18.v.2004GoogleMaps  – 28.ii.2005, R.C. Francisco coll., pitfall traps, 4 males (IBSP 114751; 114752; 114755 used on SEM; 114757).

Diagnosis. Males of S. sevegnaniae  sp. nov. resemble those of S. palmar Goloboff, 1995  and S. tenuistyla Goloboff, 1995  by the long and slender embolus ( Figs 49–51View FIGURES 49 – 55, 56, 57View FIGURES 56 – 64), but can be distinguished by the palpal bulb with straight duct and more elevated keels ( Figs 49–51View FIGURES 49 – 55, 56–58View FIGURES 56 – 64). Females resemble those of S. tenuistyla  and S. pescador  sp. nov. by the spermathecae having a reduced basal dome, but can be distinguished by the rounded basal dome with a single receptaculum arising from the internal side ( Figs 52, 53View FIGURES 49 – 55).

Etymology. The specific name is a patronym in honor of Dr. Lucia Sevegnani (in memoriam), a researcher who has actively worked in the study and conservation of several areas of the Santa Catarina state, mainly in the Itajaí watershed Valley.

Description. Male (holotype). Color pattern in ethanol: carapace yellowish brown, legs brown. Body with light pubescence, covered with golden setae. Abdomen dorsally brownish yellow with four brown mottled areas forming chevron and ventrally yellowish brown with eight spots. Total length, 8.12. Carapace 3.60 long, 2.60 wide, with short and procurved fovea. Abdomen 3.52 long, 1.81 wide. Thoracic region slightly raised. Clypeus narrow, 0.05. Eye tubercle weakly elevated, wider than long. Anterior eye row slightly procurved, posterior recurved. Eye sizes: AME 0.14, ALE 0.21, PME 0.13 and PLE 0.17. Chelicerae with eight teeth in prolateral row, with ca. 20 basal smaller teeth and rastellum weak, formed by long thin setae. Intercheliceral tumescence small, pale yellow covered with few setae. Labium 0.20 long, 0.41 wide, with no cuspules. Short maxillae with ca. 45 blunt cuspules on internal basal angle. Serrula restricted to one small portion of maxillary lobe and poorly developed ( Figs 59, 60View FIGURES 56 – 64). Sternum oval 1.92 long, 1.50 wide. Sternal sigilla very small, granulate, marginal: anterior and median rounded, posterior oval-elongated, twice the size of anterior, away from margin by ca. 1/4 length. Palp: measurements: femur 1.49/ patella 0.99/ tibia 1.11/ cymbium 0.60/ total 4.19; spination: tibia p0-0-2-2, r0-0-0-1. Legs: measurements: I: femur 2.31/ patella 1.50/ tibia 1.80/ metatarsus 1.71/ tarsus 1.10/ total 8.42; II: 2.20/ 1.50/ 1.62/ 1.30/ 1.10/ 7.72; III: 2.00/ 1.10/ 1.40/ 1.71/ 1.10/ 7.31; IV: 2.41/ 1.60/ 1.80/ 2.71/ 1.30/ 9.82; spination: I: femur d0-0-1, patella 0, tibia v0-1-0-1-0-(1p, 1r megaspine, Fig. 61View FIGURES 56 – 64), p0-0-1-0, metatarsus v0-1-1r-1, p0-1-0-1, 0- 1-0-0; II: femur d0-0-1, tibia v1-1 -0-2ap, p0-0-1, metatarsus v1-1 -0-2ap, p0-0-1; III: femur d0-2-1-2-0, patella p0- 1-1-1-2, r0-1-0, tibia d0-0-1, v2-2 -0-3ap, p0-2-1-2-0, r0-1-0-1-0, metatarsus d1-2-2-0-0-2, v2 -0-2-0-2-3ap, p1-1-0, r0-1-0-1-0-0; IV: femur d0-0-0-2, patella p0-1-1, r0-1-0, tibia v2 -0-2-0-3ap, p0-1-1-0, r0-1-0, metatarsus d1-2-1p- 2-0-2, v2 -0-2-0-3ap, p1-0-1-0-1-0, r0-1-0. Tibia III, IV with elongated spines on lateral and ventral side ca. 2/5 of length of segment, metatarsi III, IV on all sides ca. half of length of segment. Metatarsal preening combs: II: 4VP thick setae; III: 4VP, 4VR; IV: 5VP, 5VR. Thickened legs I –IV. Tarsi III, IV flexible. Scopulae on tarsi I ( Figs 62– 64View FIGURES 56 – 64) and II very light, symmetric and undivided, III, IV absent. Scopulae on 2/3 of metatarsi I, and 1/5 on II divided by six rows of thin setae, III, IV absent. STCAbout STC large with double row of teeth: I: 10 on each row; II: 8, 10, 10, 9; III: 10, 8, 8, 10; IV: 10 on each row; ITCAbout ITC on tarsi I –IV. Trichobothria and tarsal organ as in S. pavesii  sp. nov. Four spinnerets: PLS: basal segment 0.45, median segment 0.25, apical segment triangular 0.35 long. Spigots as in S. pavesii  sp. nov. Palp: cymbium with thin setae, resembling tarsal scopula setae; tibia long, narrow ( Figs 49, 51View FIGURES 49 – 55) and with shallow ventral excavation ( Figs 49, 51View FIGURES 49 – 55); tibial excavation and basal region of tegulum ( Figs 49, 50View FIGURES 49 – 55, 56View FIGURES 56 – 64) with grooves, suggesting possible stridulatory apparatus; bulb piriform with nine parallel keels ( Figs 49–51, 54– 56View FIGURES 49 – 55View FIGURES 56 – 64).

Female (paratype IBSPAbout IBSP 114756). Color pattern and pubescence in ethanol as in male. Total length 10.25. Carapace 3.53 long, 2.62 wide; short, procurved fovea. Abdomen 5.32 long, 3.11 wide. Thoracic region slightly raised. Clypeus very narrow, 0.06. Eye tubercle weakly elevated, wider than long. Anterior eye row procurved, posterior recurved. Eye sizes: AME 0.16, ALE 0.20, PME 0.14, PLE 0.16. Chelicerae with nine teeth in prolateral row, with ca. 25 basal smaller teeth and rastellum weak, formed by long thin setae. Labium 0.25 long, 0.50 wide, with no cuspules. Maxillae with ca. 50 blunt cuspules on internal basal angle. Serrula absent. Sternum oval 1.76 long, 1.51 wide. Sternal sigilla as in male. Palp: measurements: femur 1.52/ patella 1.01/ tibia 1.10/ tarsus 0.80/ total 4.43; spination: femur d0-0-1p, tibia v0-1p-3ap. Legs: measurements: I: femur 2.12/ patella 1.60/ tibia 1.50/ metatarsus 1.21/ tarsus 0.81/ total 7.06; II: 1.81/ 1.30/ 1.30/ 1.11/ 0.80/ 6.32; III: 1.81/ 1.10/ 1.20/ 1.61/ 1.20/ 6.92; IV: 2.41/ 1.80/ 1.60/ 2.61/ 1.30/ 9.72; spination: I: femur d0-0-1p, metatarsus v0-1r-2-0-2ap; II: tibia v0-2-0-2ap, metatarsus v0-2-2-2ap; III: femur d0-0-2, patella p0-1-0, r0-1-0, tibia v0-2-0-2ap, p0-1-1-0, r0-1-0, metatarsus d1- 2-2-0-2, v0-2-0-2-0-3ap, p1-1-1-0, r0-1-0; IV: patella p0-1-1, r0-1-0, tibia v2 ap, p0-1-2-1, r0-1-1-0, metatarsus d1- 2-0-2-0-2, v0-2-0-1p-0-2-0-3ap, p0-0-1-0-1, r0-1-0. Legs III, IV with weakly developed spines on all sides: tibia ca. 2/5 length of segment, metatarsus ca. 1/3 length of segment. Metatarsal preening combs: II: 5VP; III: 4VP, 4VR; IV: 4VP, 4VR. Thickened legs I –IV. Tarsi I –IV not flexible, rigid. Scopulae on tarsi I, II dense, symmetric and divided by five rows of thin setae, III, IV absent. Scopulae on 3/4 of metatarsi I divided by five rows of thin setae and on 1/5 of II divided by eight rows of thin setae. Scopulae on metatarsi III, IV absent. STCAbout STC large with double row of teeth: I and IV: 8, II: 6, III: 9. ITCAbout ITC on tarsi I –IV. Palpal claw with five teeth on promargin.Trichobothria and tarsal organ as in S. pavesii  sp. nov. Four spinnerets: PLS: basal segment 0.50, median segment 0.49, apical segment triangular 0.42 long. Spigots as in S. pavesii  sp. nov. Spermathecae formed by branch with single receptaculum arising from internal border of basal dome on each side ( Figs 52, 53View FIGURES 49 – 55).

Variation. Males (n=5): total length 6.20–8.10; carapace 2.70–3.20 long; maxillae with 37–47 cuspules. Distribution. Known only from the type locality, Blumenau, Santa Catarina, Brazil.

IBSP

Instituto Biologico de Sao Paulo

FURB

Universidade Regional de Blumenau

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

MCN

McNeese State University

MCTP

Museu de Ciencias

STC

Sichuan Teacher's College

ITC

International Transit Centre