Tobias pustulosus Mello-Leitão, 1929, Mello-Leitao, 1929

Machado, Miguel, Teixeira, Renato Augusto & Lise, Arno Antonio, 2015, Taxonomic notes on the crab spider genus Tobias Simon, 1895 (Araneae, Thomisidae, Stephanopinae), Zootaxa 4034 (3), pp. 565-576: 570-574

publication ID

http://dx.doi.org/10.11646/zootaxa.4034.3.8

publication LSID

lsid:zoobank.org:pub:A8916D87-2687-452B-AD13-809022729930

persistent identifier

http://treatment.plazi.org/id/03E95D3A-2E4C-8054-CCA6-FC37BAC8F9FD

treatment provided by

Plazi

scientific name

Tobias pustulosus Mello-Leitão, 1929
status

 

Tobias pustulosus Mello-Leitão, 1929  

Figs 12–22 View FIGURES 12 – 17 View FIGURES 18 – 24

Tobias pustulosus Mello-Leitão, 1929: 86   , figs 183–184

Tobias monstrosus Simon   in Mello-Leitão, 1929: 87, figs 185–186; syn. nov.

Type material: Holotype (designated by Mello-Leitão, 1929): subadult female, Fonte Boa [2 ° 28 ' 5.16 "S, 66 ° 8 ' 29.49 "W, Amazonas, Brazil] ( MNHN 4560).

Syntypes of T. monstrosus   : 5 females from Tefé [3 ° 21 ' 5.31 "S, 64 ° 42 ' 53.36 "W, Amazonas, Brazil] and Caballococha [3 ° 54 '21.00"S, 70 ° 30 '59.00"W, Província de Mariscal Ramón Castilla, Loreto, Peru] ( MNHN 6981).

Note. The holotype of T. pustulosus   is a subadult female and presents a pre-epigynum with an initial outgrowth at the median field equivalent to the projection that covers the copulatory openings in adult individuals. Also, the pattern of white punctuations close to the anal tubercle, present in mature individuals, can be observed in this specimen ( Figs 12–13 View FIGURES 12 – 17 ).

Other material examined. PANAMA: Colón: 1 female, Canal Zone: Fort Sherman, 9 ° 21 ' 50.49 "N, 79 ° 57 ' 33.36 "W (A. M. Chickering leg., 13 August 1936, MCZ); 1 male, (A. M. Chickering leg., 15 August 1939, MCZ); Barro Colorado Island, 9 ° 9 ' 7.57 "N, 79 ° 50 ' 47.33 "W, 1 male, 15 July 1934, 1 male, 7–9 July 1936, 1 subadult female, 25 July 1936, 1 male 8–9 August 1936, 1 subadult female, August 1936, 2 males, January 1958, 1 male, June 1950, 1 subadult female, 20 July 1954, 1 male, July 1939, 1 male, August 1939, 2 males, June 1950, 1 subadult female, 23–30 June 1939, 1 subadult female, 04–06 August 1939, 1 subadult female, 23 July 1936, all material leg. A.M. Chickering ( MCZ). Panama City: 1 male and 1 subadult female, Forest Reserve, 9 ° 8 ' 32.19 "N, 79 ° 43 ' 26.59 "W (A. M. Chickering leg., July 1939, MCZ); Summit Park, 9 ° 3 ' 54.80 "N, 79 ° 38 ' 43.07 "W, 1 male and 1 female, 21–29 July 1950, 2 males and 1 female, 7 July 1950, 1 male, 13 July 1954, 1 male, 16–17 August 1950, 2 subadult males and 1 subadult female, 21–24 July 1930, 2 subadult females, 25 July 1950, 1 male, 25 July 1950, all material leg. A.M. Chickering ( MCZ); 1 female, Pedro Miguel, 9 ° 1 ' 7.06 "N, 79 ° 36 ' 44.31 "W (A. M. Chickering leg., 7 July 1950, MCZ); 1 male, Exp. Gardens, 9 ° 1 ' 46.21 "N, 79 ° 32 ' 37.11 "W (A. M. Chickering leg., 14 July 1954, MCZ); 2 males, same locality (A. M. Chickering leg., 7 November 1954, MCZ); 1 male and 1 female, Mirasflores Locks, 8 ° 59 ' 50.27 "N, 79 ° 35 ' 28.33 "W (A. M. Chickering leg., 0 1 March 1958, MCZ); 1 male, Balboa, 8 ° 56 '60.00"N, 79 ° 34 '0.00"W (A. M. Chickering leg., August 1936, MCZ). BRAZIL: Roraima: 1 male, Caracaraí (Parque Nacional do Viruá), 1 ° 42 ' 12.10 "N, 61 ° 8 '54.00"W (A. Tourinho leg., 28 May 2006, INPA 1825). Rondônia: 1 subadult female, Ouro Preto do Oeste, 10 ° 36 '3.00"S, 62 ° 18 ' 34.50 "W (A. Cerruti leg., November 1983, MNRJ 4250). Bahia: 1 female, Camacan, 15 ° 26 ' 52.59 "S, 39 ° 31 ' 40.18 "W (CEPLAC R 2160 leg., 5 November 1968, MNRJ 12690); 1 female, Itamarajó, 17 ° 2 ' 17.60 "S, 39 ° 32 ' 20.31 "W (J. S. Santos leg., 7 August 1978, MCN 10690 View Materials ). São Paulo: 1 female, Iporanga, 24 ° 29 ' 8.94 "S, 48 ° 38 ' 48.01 "W (E. H. Wienkoski leg., October 2001, MNRJ 11520); 1 male, Cananéia, 25 ° 0' 45.16 "S, 47 ° 56 ' 6.98 "W (E. H. Wienkoski leg., October 2001, MNRJ 11517).

Diagnosis. Tobias pustulosus   has the same kind of setiferous tubercles on femora I and II as T. caudatus   , but can be distinguished by the yellow color and high density of the ventral pustular setiferous tubercles ( Fig. 17 View FIGURES 12 – 17 ). The epigynum of T. pustulosus   is distinguished from other species of Tobias   by the anteriorly wide median septum, like an inversed triangle, and by the copulatory openings hidden by the median septum ( Fig. 20 View FIGURES 18 – 24 ). The male palp is similar to that of T. caudatus   ( Figs 10–11 View FIGURES 5 – 11 ), but differs from the latter and other species of the genus by the presence of a basal tooth on the DTA and by its curvature, with the tip stretching to the dorsum of the cymbium ( Figs 23– 25 View FIGURES 18 – 24 View FIGURE 25 ).

Description. Female (from Tefé; MNHN 6981): Anterior and posterior eye row as in T. caudatus   . Prosoma light-brown with a brown Y-shaped spot on the dorsum. Chelicerae yellow, sternum brown with reddish-brown spots, endites and labium brown with a yellow apex. Opisthosoma with anterior margin straight and three posterior projections. The pair of lateral projections has the apexes directed forward and the median projection is short and rounded ( Fig. 14 View FIGURES 12 – 17 ). Opisthosoma with microstructure and coloration as in females of T. caudatus   . Legs with shape and coloration as in females of T. caudatus   . Femora I and II have conical and long setiferous tubercles on the dorsum and lateral regions, while the ventral portion has a high density of short and rounded yellow setae. Tibiae and metatarsi of legs I and II have both three pairs of ventral macrosetae. Sensorial pits on tibiae I and II are divided by a line of setiferous tubercles ( Fig. 18 View FIGURES 18 – 24 ). Tarsal setae tuft and claws similar to T. caudatus   . Median field of the epigynum not delimited by lateral folds. Median septum broad on the anterior portion of the epigynal plate and covering the copulatory openings ( Fig. 20 View FIGURES 18 – 24 ). Copulatory ducts are long with two pairs of spermatecae, however the primary spermatecae are at least two times larger than the secondary pair. The primary spermatecae are kidneyshaped and the secondary are ovoid, both with a rough surface ( Fig. 21 View FIGURES 18 – 24 ). Measurements: eyes diameters and eyes interdistances: AME 0.14, ALE 0.20, PME 0.14, PLE 0.10, AME-AME 0.41, AME-ALE 0.24, PME-PME 0.60, PME-PLE 0.20. MOQ length 0.76, MOQ posterior width 0.64, MOQ anterior width 0.63; leg formula: 1243: leg I—femur 5.92 / patella 3.34 / tibia 4.08 / metatarsus 3.08 / tarsus 1.75 / total 18.17; II— 5.50 / 2.92 / 4.08 / 2.50 / 1.67 / 16.67; III— 2.50 / 1.92 / 2.08 / 1.42 / 1.17 / 9.09; IV— 3.08 / 1.75 / 2.08 / 1.58 / 1.00/ 9.49. Total length 13.34, prosoma length 5.84 long, width 5.70, opisthosoma length 7.50, clypeus height 0.62, sternum length 2.45, width 1.95, endites length 1.36, width 0.70, labium length 0.90, width 0.94.

Male (from Cananeia; MNRJ 11517): Anterior and posterior eye row as in T. caudatus   , and ALE with tiny horns ( Fig. 19 View FIGURES 18 – 24 ). Prosoma dark-brown with dorsum reddish-brown. Chelicerae and palpi dark-brown ending in a yellow apex. Sternum scutiform, reddish-brown; endites and labium reddish-brown with setae as in T. caudatus   . Opisthosoma coloration similar to T. caudatus   , but the tubercles on the surface and the posterior projections are brown ( Fig. 16 View FIGURES 12 – 17 ). Legs dark-brown with white spots on the proximal portion of metatarsi I and II and the distal portion of the patellae and tibiae I and II. Other leg characteristics as in female. Palp tegulum is flat and discoid with tranversal furrow at two o’clock. Embolus filiform emerging at twelve o’ clock and extending almost two times around in the tegulum ( Fig. 22 View FIGURES 18 – 24 ). RTA similar to T. caudatus   , but with concavity (canoe) less deep than in T. caudatus   ending in a tooth near to the DTA base ( Fig. 23 View FIGURES 18 – 24 ). DTA is hook-like as in T. caudatus   , but it stretches in a curve towards the back of the cymbium. Measurements: eyes diameters and eyes interdistances: AME 0.06, ALE 0.07, PME 0.06, PLE 0.04, AME-AME 0.14, AME-ALE 0.08, PME-PME 0.20, PME-PLE 0.10. MOQ length 0.24, MOQ posterior width 0.22, MOQ anterior width 0.21; leg formula: 1243: leg I—femur 1.22 / patella 0.60 / tibia 0.78 / metatarsus 0.54 / tarsus 0.42 / total 3.56; II— 0.96 / 0.60 / 0.73 / 0.52 / 0.40 / 3.21; III— 0.52 / 0.38 / 0.42 / 0.33 / 0.29 / 1.94; IV— 0.70 / 0.38 / 0.50 / 0.38 / 0.34 / 2.30. Total length 2.87, prosoma length 1.42, width 1.36, opisthosoma length 1.45, clypeus height 0.24, sternum length 0.64, width 0.60, endites length 0.30, width 0.16, labium length 0.18, width 0.25.

Variation. Females (e.g. MNRJ 6807) might have a lighter coloration on the prosoma and opisthosoma. The median projection of the opisthosoma may be longer ( Figs 12 and 15 View FIGURES 12 – 17 ). This variation in size and shape of the median projection of the opisthosoma, as well as that observed in females of T. caudatus   , is probably related to the developmental stage and/or the degree of starvation of the spider.

Distribution. Distributional range extends from Canal Zone in Panama to the State of São Paulo in Brazil ( Fig. 25 View FIGURE 25 ).

MNHN

Museum National d'Histoire Naturelle

MCZ

Museum of Comparative Zoology

INPA

Instituto Nacional de Pesquisas da Amazonia

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Thomisidae

Genus

Tobias

Loc

Tobias pustulosus Mello-Leitão, 1929

Machado, Miguel, Teixeira, Renato Augusto & Lise, Arno Antonio 2015
2015
Loc

Tobias pustulosus Mello-Leitão, 1929 : 86

Mello-Leitao 1929: 86
1929
Loc

Tobias monstrosus

Mello-Leitao 1929: 87
1929