Stemmops murici, Santanna & Rodrigues, 2018

Santanna, Manoela & Rodrigues, Everton Nei Lopes, 2018, Five new species and new records of the spider genus Stemmops (Araneae, Theridiidae, Spintharinae) from Brazil, Zootaxa 4524 (2), pp. 174-186 : 175-177

Stemmops murici new species

Figs. 1–3 , 10, 11 , 24

Type material. Holotype, BRAZIL: Alagoas, Murici, Estação Ecológica de Murici , 09°15’S– 35°51’W, 13– 22.IX.2003, Equipe Biota leg., pitfall-trap, 1M ( IBSP 215203 ) . Paratypes. BRAZIL: same data the holotype, 1M ( MCN 48734) ; same data the holotype, 1F ( MCN 48734) ; Goiás, Catalão , 18°02’39”S– 48°00’36”W, 10– 16.II.2003, J. P. Guadanucci leg., pitfall-trap, 1F ( MCN 48720) ; Minas Gerais, Matozinhos, Mocambeiro , 19°33’12”S– 44°01’07”W, 08–18.II.2011, C. A. R. Souza leg., 1F ( IBSP 180228 ) ; same data the anterior paratypes, 1M ( IBSP 189587 ) , 1F ( IBSP 189582 ) ; Morro do Pilar , 19°14’34”S– 43°22’04”W, 13–17.II.2012, Equipe Carste leg., 1F ( IBSP 189594 ) ; Taiobeiras, Tocão , 15°48’S– 42°14’W, 17.IV.2002, Equipe Biota leg., pitfall-trap, 1M ( MCN 48739) ; Rio de Janeiro, Volta Redonda, Floresta da Cicuta , 22°34’S– 44°21”W, 18.VI.2001, Equipe Biota leg., night manual collection, 1M ( IBSP 215204 ) ; same data the anterior paratype, 1M ( IBSP 215205 ) ; Cachoeiras de Macacu, Reserva Ecológica de Guapiaçu , 22°25’S– 42°44’W, 08.XI.2001, Equipe Biota leg., beating tray, 1M ( IBSP 48738 ) ; same data the anterior paratype, 1M ( IBSP 215206 ) ; São Paulo, Peruíbe, Estação Ecológica Júreia Itatins , 24°33’S– 47°13’W, 26.IV–03.V.1999, A. D. Brescovit et al. leg., winkler, 1M ( IBSP 25796 ) , 1M ( IBSP 25249 ) ; same data the anterior paratype, 1M ( IBSP 25718 ) , 1M ( IBSP 25765 ) , 1M ( IBSP 24692 ) , 1M ( IBSP 25552 ) ; same data the anterior paratypes, 1F ( IBSP 25354 ) , 1F ( IBSP 25689 ) , 1F ( IBSP 25795 ) ; Paraná, Antonina, Reserva Natural do Rio Cachoeira , 25°41’S– 48°74’W, 23.IX.2005, I. Cizauskas leg., looking down, 1M ( MCN 44635) .

Et y mology. The species name is a noun in apposition taken from the type locality.

Diagnosis. Males are similar to Stemmops carius Marques & Buckup, 1996 (see Marques & Buckup 1996, figs. 1, 2) by the shape of embolus and by the theridiid tegular apophysis hook-like apex (vide Marques & Buckup, 1996, figs 1–2), but differ from this species by the embolus short, and trajectory of the embolus that loops far from the tegulum edge, and conductor smaller ( Fig. 1 ) than the S. carius . Females resemble Stemmops carius (vide Marques & Buckup, 1996, figs. 7–8) by the presence of oval spermathecae, ventral epigynum with a narrow and elongated longitudinal median depression and coiled fertilization ducts, but differ by the spermathecae less separated from each other, in ventral view ( Figs. 2, 3 ).

Description. Male holotype (from Estação Ecológica de Murici, IBSP 215203): Total length 1.57. Carapace: length 0.69, width 0.58. Clypeus height: 0.12. Sternum: length 0.44, width 0.39. Chelicerae: length 0.18, width 0.10. Abdomen: length: 0.88, width 0.54, height 0.58. Leg formula IV/I/II/III. Segment length (I/II/III/IV): femora 0.84/0.58/0.50/0.81; patellae+tibiae 0.75/0.73/0.65/1.05; metatarsi+tarsi 1.13/0.86/0.86/1.11; total: 2.73/2.18/2.01/ 2.98. Palp: femora 0.23, patellae 0.06, tibiae 0.08, cymbium 0.33. PME biggest, PME separated from each other by 0.02; AME separated by 0.04. Carapace circular ( Fig. 10 ), pale yellow, darkened in median portion after PME. Clypeus concave, laterally. Chelicerae pale yellow. Labium subtriangular, pale yellow. Endites yellow. Ocular region dark except between PME. Sternum pale yellow, with dark dots. Legs pale yellow, except metatarsus and tarsus brown. Abdomen oval ( Fig. 10 ), grey with a pale yellow spot above spinnerets and venter lighter.

Female paratype (from Estação Ecológica Júreia Itatins, Peruíbe, IBSP 25354): Total length 1.68. Carapace: length 0.69, width 0.63. Clypeus: height 0.12. Sternum: length 0.42, width 0.39. Chelicerae: length 0.23, width 0.08. Abdomen: length 1.23, width 0.79, height 0.84. Leg formula IV/I/II/III. Segment length (I/II/III/IV): femora 0.84/0.63/0.46/0.75; patellae+tibiae 0.96/0.73/0.60/1.05; metatarsi+tarsi 1.02/0.79/0.79/1.09, total: 2.83/2.16/1.86/ 2.89. Palp: femora 0.18, patellae 0.08, tibiae 0.21, tarsi 0.18. PLE and AME biggest, PME separated from each other by 0.02. Color of carapace ( Fig. 11 ), legs and abdomen as in male, except spot in dorsal carapace, in female is less darkened.

Variation. Some paratypes abdomen and carapace pale yellow to white. Males (n= 15): Total length: 1.47– 1.95. Carapace: length 0.65–0.84, width 0.50–0.69 Femur leg I length: 0.65–1.02. Females (n= 8). Total length: 1.40–2.47. Carapace: length 0.52–0.75, width 0.58–0.69. Femur leg I length: 0.81–0.86.

Distribution. Brazil (Alagoas, Goiás, Minas Gerais, Rio de Janeiro, São Paulo and Paraná, Fig. 24 ).

Figures

FIGURE 24. Distribution of the new species of genus Stemmops in Brazil: Stemmops murici new species and S. pains new species.

FIGURES 1–4. Stemmops murici new species: 1, Male: Palp, ventral. 2–3, Female: 2, Epigynum, ventral, 3, Dorsal, clarified. Stemmops carauari new species: 4, Male: Palp, ventral. Scale bars, 0.25 mm.

FIGURES 10–23. Body, dorsal view. Stemmops murici new species: 10, Male, 11, Female. Stemmops carauari new species: 12, Male. Stemmops carajas new species: 13, Male, 14, Female. Stemmops pains new species: 15, Male. Stemmops guapiacu new species: 16, Female. Stemmops belavista Marques & Buckup, 1996: 17, Female. Stemmops carius Marques & Buckup, 1996: 18, Female, 19, Male. Stemmops servus Levi, 1964: 20, Male, 21, Female. Stemmops vicosa Levi, 1964: 22, Male, 23, Female. Scale bars, 0,5mm.