Ischnothyreus velox Jackson, 1908

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 : 8-10

Ischnothyreus velox Jackson, 1908

( Figs 26-30 , 59 )

Ischnothyreus velox JACKSON, 1908:51 , pl. 4, figs 9-13 (Lectotype male from greenhouse in Chester, England, in BMNH); SAARISTO, 2001:347 (desig. lectotype); PLATNICK et al., 2012b:27 , figs 100-132.

Ischnothyreus barrowsi CHAMBERLIN & IVIE, 1935:9 , pl. II, fig. 7 (female holotype from Marco Island, Collier Co., Florida, USA, in AMNH). PLATNICK et al., 2012b:27 (Syn.).

Ischnothyreus indressus CHICKERING,1968a:84 , figs 13-20 (male holotype from Nevis, Leeward Islands, in MCZ; examined); PLATNICK et al., 2012b:27 (Syn.).

Diagnosis. Ischnothyreus velox differ from I. peltifer by the males lacking a protuberance on the base of the fang; palps with rounded bulb and sperm pore larger than that of I. peltifer ( Figs 28-30 ). Females of I. velox have a distinctively procurved ridge occupying most of the width of the postepigastric scutum ( Fig. 27 ).

Description. Male and female, see PLATNICK et al. 2012b:27, figs 100-132.

Distribution. According to PLATNICK et al. (2012b), who recorded this species in the state of Amazonas, this Pantropical species was probably introduced in Americas from Asia. The present records in Brazil are anecdotic but depict a wide distribution in the Western and Central Amazonia, as well as in the Northeastern state of Sergipe ( Fig. 59 ).

Material examined. BRAZIL. Acre: Senador Guiomard, Reserva Extrativista Catuaba (10°12’51.4584”S - 67°45’17.1216”W), ♀, 2002, E. Morato et al. leg. ( IBSP 86903 ) ; Amazonas: Benjamin Constant (04°22’58”S - 70°1’51”W), ♀, 2010, P. S. Pompeu et al. leg. ( IBSP 166574 ) ; Coari, Rio Urucu, Base de Operações Geólogo Pedro de Moura (04°52’16”S - 65°20’04”W), ♂, ♀, 11-20.VII.2003, A. B. Bonaldo, J. Dias & D. Guimarães leg. ( MPEG 10212 , 10214 ; PBI _ OON 40693 , 40725 ) ; Sergipe: Simão Dias, Toca da Raposa (10°43’46.992”S - 37°50’54.9702”W), 2♀, 20.VI.2014, no col. ( IBSP 166579-166580 ) .

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.