Titanattus parvus ( Mello-Leitão, 1945 )

Rubio, Gonzalo D., 2021, A new synonym of Titanattus parvus (Mello-Leitão, 1945) (Araneae: Salticidae: Thiodinini), Peckhamia 238 (1), pp. 1-4 : 2

Titanattus parvus ( Mello-Leitão, 1945)

Figures 1-16

Nebridia parva Mello-Leita @o, 1945: 289, fig. 79 (female holotype deposited in MLP 16.810 , from Pindapoy, Misiones, Argentina, BirabeFn coll., examined) .

Amphidraus parvus Zhang & Maddison, 2015: 22 .

Titanattus parvus Salgado & Ruiz, 2017: 430 , fig. 27E.; World Spider Catalog 2021.

Titanattus acanjuba Bustamante & Ruiz, 2017: 339 , fig. 29 (female paratype IBSP 86.162 , from Subregio @es Miranda e Abobral , Mato Grosso do Sul, Brazil, VI.1998 – XI.1999, Raizer et al. coll., examined by photographs). New synonymy .

Note. The MLP collection has one glass tube for the holotype T. parvus (sub Nebridia : N. parva ), labeled as “Pindapoy, Misiones, BirabeFn leg. 16.810” and containing one female specimen in fairly good condition but the sternum is broken and the cephalothorax is separated from the abdomen ( Figures 1–6 ). The same lot has a small glass vial containing the dissected epigyne ( Figure 1 ).

Justification oF the synonymy. Bustamante & Ruiz (2017) described T. acanjuba based on one male (holotype) and one female (paratype) collected in Mato Grosso do Sul, Brazil. Detailed examination of the types showed no differences between this species and T . parvus. The thin median septum in the epigyne of T . acanjuba and the size and shape of the spermathecae are the same as those of the holotype for T. parvus ( Compare Figure 4 with Bustamante & Ruiz, 2017: figs. 29D, E). This is a species widely distributed in northeastern Argentina, and the discovery of specimens of both sexes in a locality very close to the type locality of T. parvus (less than 30 km distant) led us to notice that there are no differences between the males at this locality and the holotype of T acanjuba ( Compare Figures 12–15 with Bustamante & Ruiz, 2017: figs. 29A–C). Therefore I consider T. acanjuba to be a junior synonym of T. parvus .

Diagnosis and description. See Bustamante & Ruiz (2017) and Mello-Leita@o (1945). Photographs of the holotype for T. parvus and other specimens ( Figures 1-11 ) and additional illustrations ( Figures 12–16 ) are given here.

Distribution. Known from Brazil and Argentina; some new records for Argentina are listed here. Additional material examined. ARGENTINA: Misiones: 1 female, Karadya Reserve (S25.859584°, W53.960847°), 419 m asl, 14.I.2016, J. Baigorria coll. (IBSI-Ara 0484); 1 male, same locality and collector, 30.XI.2015 (IBSI-Ara 0498); 1 male, same locality and collector, 07.X.2015 (IBSI-Ara 0513); 1 male, same locality and collector, 05.X.2016 (IBSI-Ara 0816); 1 female, same locality and collector, III.2018 (IBSI-Ara 1168); 1 female, Cerro Azul, INTA Experimental Station, tea crop (S27.657515°, W55.437466°), 280 m asl, 22.X.2018, G. Rubio coll. (IBSI-Ara 1340); 1 male, same data, 01.X.2015 (IBSI-Ara 1553); Chaco: 1 male, 1 female, near Las Garcitas (S26.575460°, W59.756837°), 87 m asl, 09.III.2017, M. Nadal coll. (IBSI-Ara 1552); Corrientes: 1 female, Galarza, IberaF(S28.096503°, W56.6907°), 81 m asl, 04.IV.2006, G. Avalos & G. Rubio coll. (IBSI-Ara 0696).

Figures

Figures 1-11. Female of Titanattus parvus (Mello-Leita@o). 1-6, Holotype (MLP 16.810). 1, Glass vial containing specimen. 2, Carapace and legs, dorsal view. 3, Abdomen, dorsal view. 4, Epigyne, ventral view. 5, Cephalothorax, ventral view. 6, Abdomen, ventral view. 7, Specimen from Chaco (IBSI-Ara 1552), epigyne, ventral view. 8-11, Specimen from Misiones (IBSI- Ara 1340). 8-9, Cleared epigyne, ventral view. 10, Same, dorsal view. 11, Same, detail of spermathecae.

Figures 12-16. Male of Titanattus parvus (Mello-Leita@o). 12-16, Specimen from Misiones (IBSI-Ara 1553). 12, Palp, prolateral view. 13, Same, ventral view. 14, Same, retrolateral view. 15, Same, cleared ventral view. 16, Same, expanded prolateral ventral view.