Ischnothyreus peltifer ( Simon, 1891 )

Brescovit, Antonio D., Bonaldo, Alexandre B., Ott, Ricardo & Chavari, João L., 2019, To boldly go: on invasive goblin spiders in Brazil (Araneae, Oonopidae), Iheringia, Série Zoologia (e 2019033) 109, pp. 1-20 : 8

Ischnothyreus peltifer ( Simon, 1891)

( Figs 20-25 , 59 )

Ischnaspis peltifer SIMON, 1891:562 (four female syntypes from Saint Vincent, Antilles , in BMNH, and one female syntype from St.Vincent, in MNHN).

Ischnothyreus peltifer : SIMON, 1893c:298 (not male, fig. 264, = Camptoscaphiella simoni Baehr ); PLATNICK et al., 2012b:7 , figs 1-99.

Dysderina antillana BRYANT, 1942:324 , figs 1, 7 (male holotype from Christiansted, Saint Croix, Virgin Islands, in MCZ; examined); CHICKERING, 1968a:80 (Syn.)

Ischnothyreus omus SUMAN,1965:226 , figs 1-8 (male holotype from Kailua, Oahu, Hawaii, in Bishop Museum, Honolulu). SAARISTO, 2001:345 (Syn.).

Ischnothyreus formosus BRIGNOLI, 1974b:80 , figs 12-18 (male holotype from Akau, Taiwan, in Zoological Museum, Hamburg); SAARISTO, 2001:345 (Syn.).

Ischnothyreus sechellorum BENOIT, 1979:208 , figs 7A-E (female holotype from Mahe, Seychelles Islands, in MRAC); SAARISTO, 1999:3 (Syn.).

Diagnosis. Males of Ischnothyreus peltifer can easily be separated from those of I. velox by the large protuberance on the base of the cheliceral fang in males ( Fig. 23 ) and narrow, posteriorly situated, sinuous ridge on the postepigastric scutum ( Fig. 22 ) in females.

Description. Male and female, see PLATNICK et al. 2012b:7, figs 1-99.

Distribution. According to PLATNICK et al. (2012b), this Pantropical species was probably introduced in Americas from Asia. Our records indicated that it was present only in three Brazilian states, the Northern State of Pará, the Northeastern State of Bahia and in the Southeastern State of São Paulo ( Fig. 59 ). Judging by the records obtained, at the moment this species is not sympatric with I. velox in Brazil.

Material examined. BRAZIL. Pará: Belém, Ilha de Cotijuba (01°14’51.44”S - 48°32’47.14”W), ♀, XI.2004, L. Macambira leg. ( MPEG 10271 , PBI _ OON 40724 ) ; Bosque Rodrigues Alves (01°25’49”S - 48°27’23”W), 2♀, XI/2004, J. Barreiro leg. ( MPEG 10478 , 10479 ; PBI _ OON 40726 , 40727 ) ; Belém, Mata de Várzea , ♂, 2♀, X.2004, L. Macambira leg. ( MPEG 10709 , PBI _ OON 40692 ) ; Bahia: Salvador, Baia do Aratu (12°47’32.8”S – 38°28’15.3”W), 3♂, ♀, 2007-2009, K. Benati leg. ( IBSP 126042 , 126086 , 126131 , 126135 ) ; Presidente Tancredo Neves (13°24’32”S - 39°20’05”W), 2♀, 07.II.2011, C. M. P. Leite ( IBSP 166612 , 166614 ) ; Itamaraju (16°57’58”S - 39°26’01”W), ♀, 14.IV.2011, C. M. P. Leite leg. ( IBSP 166613 ) ; São Paulo: Ubatuba, Parque Estadual da Ilha Anchieta (23°32’S – 45°03’W), ♂, 23-30.VII.2001, Equipe Biota leg. ( IBSP 69881 ) .

Figures

Figs 20-30. Figs 20-25, Ischnothyreus peltifer (Simon, 1891), male: 20, dorsal; 23, projection of chelicerae; 24, palp prolateral; 25, palp retrolateral. Female: 21, dorsal; 22, genitalia, ventral. Figs 26-30, Ischnothyreus velox Jackson, 1908, female: 26, dorsal; 27, genitalia, ventral. Male: 28, palp retrolateral; 29, palp prolateral; 30, palp ventral.

Figs 58, 59. Brazilian records of: 58, Brignolia dasysterna and B. pauropunctata; 59, Xestaspis parmata, Heteronoops spinimanus, Ischnothyreus peltifer and I. velox.