Ischnothyreus velox Jackson, 1908

Platnick, Norman I., Dupérré, Nadine, Ubick, Darrell & Fannes, Wouter, 2012, The Goblin Spider Genus Ischnothyreus (Araneae, Oonopidae) in the New World, American Museum Novitates 2012 (3759), pp. 1-32 : 27-29

Ischnothyreus velox Jackson

Figures 100–132

Ischnothyreus peltifer (misidentification): Simon, 1891: 562 (in part, females from the Philippines only). – Platnick et al., 2012a: 12, figs. 21, 24 only (in part, tarsal organ scans of male from Amazonas, Brazil).

Ischnothyreus lymphaseus (misidentification): Simon, 1896: 92 (females from greenhouses of MNHN only).

Ischnothyreus velox Jackson, 1908: 51 , pl. 4, figs. 9–13 (lectotype male from greenhouse in Chester, England, in BMNH, examined and designated by Saaristo, 2001: 347). – O. P.- Cambridge, 1908: 165, pl. A, figs. 1–6. – Bristowe, 1948: 890, figs. 15–20 (not fig. 1). – Locket and Millidge, 1951: 76, fig. 38C (not fig. 38E). – Heimer and Nentwig, 1991: 50, fig. 107. – Saaristo, 2001: 347, figs. 146B, 151, 155B. – El-Hennawy, 2008: 27, figs. 9–16.

Ischnothyreus barrowsi Chamberlin and Ivie, 1935: 9 , pl. II, fig. 7 (female holotype from Marco Island , Collier Co., Florida, in AMNH; examined). NEW SYNONYMY.

Dysderina antillana (misidentification): Bryant, 1948: 340 (female, Hispaniola).

Ischnothyreus indressus Chickering, 1968: 84 , figs. 13–20 (male holotype from Nevis, Leeward Islands, in MCZ; examined). NEW SYNONYMY.

DIAGNOSIS: Males differ from those of I. peltifer in lacking a protuberance on the base of the fang (fig. 104); their palps differ from those of I. peltifer and instead resemble those of I. lymphaseus , from Sri Lanka, in having a rounded bulb (in that species, the embolus is shorter and bears a longer distal extension than in I. velox ); males also have a larger sperm pore than do those of I. peltifer (fig. 107). Females of I. lymphaseus are unknown, but those of I. velox have a distinctively procurved ridge occupying most of the width of the postepigastric scutum (figs. 127–132).

MALE (PBI_OON 16072, figs. 100–120): Total length 1.55. As in male of I. peltifer except as noted. Carapace pale orange, broadly oval in dorsal view, anterolateral corners without extension or projections, nonmarginal pars thoracica setae light, needlelike. Sternum yellow. Fangs directed medially, without prominent basal process. Dorsal scutum pale orange, not fused to epigastric scutum. Spinnerets not scanned. Leg spination: femora: I p0-0-2; II p0-0-1; tibiae I, II v4-2-2; metatarsi I, II v2-2-0. Tarsal claws, tarsal organs not scanned. Palp with proximal segments, cymbium, bulb all brown; bulb more than twice as long as cymbium, rounded, with one protuberance on ventral side; embolus clearly delimited, with ventral T-shaped extension within translucent ventral flange, apex with long, narrow extension.

FEMALE (PBI_OON 16072, figs. 121–132): Total length 2.11. As in female of I. peltifer except as noted. Carapace with lateral reticulations covering almost whole carapace, only uppermost part smooth. Palpal tibia with at least two trichobothria. Pedicel scutum not extending far dorsal of pedicel. Dorsal scutum covering less than half of abdomen length. Leg spination: femora: I p0-1- 1; II p0-0-1; tibiae I, II v4-2-2; metatarsi I, II v2-2-0. Postepigastric scutum with boat-shaped transverse ridge situated at about half of scutum length, occupying most of scutum width; posterior genitalic tube narrow, squiggled, terminating at level of transverse ridge.

MATERIAL EXAMINED: NORTH AMERICA: United States: Florida: Collier Co.: Marco Island, Jan. 9, 1930 (W. Barrows, AMNH PBI_OON 49465), 1♀ (holotype). Mexico: Nayarit: San Blas , Aug. 7, 1960, mangrove swamp ( AMNH PBI_OON 1951), 1♀ . Tabasco: Parque La Venta, Villahermosa , 18°00′N, 92°56′W, Aug. 13, 1966 (J., W. Ivie, AMNH PBI_OON 1952), 1♀ . Yucatán: Cueva de Tecoh, Mérida , Oct. 6, 1974 (J. Reddell, D. McKenzie, AMNH PBI_OON 1949), 1♂ . CENTRAL AMERICA: Panama: Colón: Gatún , Feb. 27, 1958 (A. Chickering, ex MCZ 71384, PBI_OON 37504), 1♀ . Panamá: vicinity of Pedro Miguel , Aug. 1954 (A. Chickering, ex MCZ 71401, PBI_OON 9117), 1♂ . WEST INDIES: Jamaica: Kingston: Institute Gardens , Kingston, Nov. 7, 1949 (Bengry, MCZ 66521, PBI_ OON 27285, 1♀ . St. Andrew: Mona , Dec. 1963 (A. Chickering, ex MCZ 71326, PBI_OON 43567), 1♀ . St. Catherine: School of Agriculture , Nov. 23, 1957 (A. Chickering, ex MCZ 32461, PBI_OON 36963), 1♀ ; 1.5 mi E Spanishtown, Oct. 10, 1957 (A. Chickering, MCZ 71325, PBI_OON 27277), 1♀ . Hispaniola: Haiti: Port-au-Prince , Sept. 1–5, 1934 (P. Darlington, MCZ PBI_OON 49467), 1♀ . Virgin Islands: St. Thomas: Charlotte Amalie , Feb. 14, 1964, grass and weed litter (A. Chickering, MCZ 66845, PBI_OON 27431), 1♂ . Leeward Islands: Nevis : no specific locality, Sept. 24–29, 1966 (A. Chickering, MCZ 66709, 66710 , PBI_OON 27433, 27434, 49464) , 1♂, 5♀ (holotype, paratypes). Windward Islands: St. Vincent : no specific locality, Oct. 15–24, 1966 (A. Chickering, MCZ 66708, PBI_OON 27432) , 3♂. SOUTH AMERICA: Venezuela: Portuguesa: Guanare , Sept. 10–17, 1957 (B. Malkin, AMNH PBI_OON 1958), 2♂, 1♀ . Brazil: Amazonas: Base de Operações Geólogo Pedro de Moura, Urucu River, Coari , 4°52′07.6″S, 65°15′53.6″W, July 11–20, 2003 (A. Bonaldo, J. Dias, D. Guimarães, MPEG 10212 , 10214 , PBI_OON 40693, 40725), 1♂, 1♀ . OLD WORLD: France: Île-de-France: Paris , greenhouses of MNHN, 1896–1899 ( MNHN 5741 , PBI_OON 32316), 3♀ (N.B.: an additional vial, MNHN 5739 , PBI_OON 32318 contains 1♂ and 1♀ of this species but lacks locality data) . Germany: Berlin: Tiergarten, Zoo-Aquarium , 52°30′22″N, 13°20′29″E, May 15, 2009, sifted, elev. 37 m (K. Kielhorn, CKH PBI_OON 32560), 2♀ . Brandenburg: Dahme-Spreewald, Brand, Tropical Islands Dome, 52°2′20″N, 13°44′55″E, Mar. 14, 2010, sifted, elev. 78 m (K. Kielhorn, CKH PBI_OON 32561), 1♀ , Dec. 8, 2011, same (K. Kielhorn, CKH PBI_OON 32562), 2♂ . Madagascar: Toamasina: Maroantsetra, Oct. 1946 , under trunk (J. Millot, MNHN PBI_OON 36358), 1♀ . Seychelles: Sillhouette: La Passe , Jan. 8, 1999, lumber pile (M. Saaristo, J. Gerlach, AMNH PBI_OON 1974), 1♂, 2♀ , same ( ZMUT 1239 , PBI_OON 16072), 1♂, 1♀ . Philippines: National Capital Region : Manila ( MNHN 5735 , PBI_OON 32323), 2♀ . Marshall Islands: Eniwetok Atoll: Japtan Island , 11°26′N, 162°23′E, July 20, 1968, pitfalls, scaveola/messerschmidia ( AMNH PBI_OON 38602), 1♂, 1♀ , July 20–22, 1968, messerschmidia litter ( AMNH PBI_OON 38557, 38621), 2♂, 5♀ , July 22, 1968, under oil barrels ( AMNH PBI_OON 38579), 1♂, 2♀ , Aug. 7, 1968, under trash (J. Beatty, AMNH PBI_OON 38578), 1♂ ; Muti Island , June 22, 1968, pisonia forest litter ( AMNH PBI_OON 38618), 1♀ ; Parry Island , June 29, 1968, litter, ipomoea/sedge community (J. Berry, AMNH PBI_OON 37445), 2♂, 1♀ . Kwajalein Atoll: Kwajalein Islet , July 20, 1969, garbage heap ( AMNH PBI_OON 38613), 1♀ ; Roi-Namur Island , July 9, 1968, scaveola/messerschmidia/pandanus litter ( AMNH PBI_OON 38619), 1♀ , July 10, 1968, litter at base of coconut tree ( AMNH PBI_OON 38594), 1♂, 3♀ ; July 22, 1969, coconut trash litter ( AMNH PBI_OON 38555), 1♂ , same, wedelia thicket litter ( AMNH PBI_OON 38582), 1♂ . Hawaii: Kauai : Makahuena Point, near Poipu , Jan. 18, 1998, casuarina litter (J., E. Berry, J. Beatty, AMNH PBI_OON 37751), 1♀ . Oahu: Pupukea Beach Park, Waimea , Jan. 10, 1988, beach rubble (J. Berry, AMNH PBI_OON 38549), 1♀ ; Wahiawa (H. Hagan, MCZ 71324, PBI_OON 26770), 1♂, 1♀ . Marquesas Islands : Hivaoa: Atuona , near harbor, Feb. 11, 1987, grass, litter (J., E. Berry, AMNH PBI_ OON 37752), 1♀ . Nuku Hiva: Hakaui Bay , Jan. 25, 1987, forest litter on sand near ocean (J. Berry, AMNH PBI_OON 37750), 2♀ ; sea cove next W Taiohae , Jan. 30, 1987, litter (J., E. Berry, AMNH PBI_OON 38377), 1♀ ; Taipivai village , Jan. 27, 1987, litter ( AMNH PBI_OON 37753), 1♀ . New Caledonia: Ouen Toro, Noumea , Sept. 3, 1990, dry forest, elev. 125 m (N. Platnick, R. Raven, P. Goloboff, AMNH PBI_OON 1960), 1♂, 1♀ .

DISTRIBUTION: Pantropical (although not yet recorded from Africa south of Egypt), and introduced in European greenhouses; sometimes sympatric with I. peltifer .

SYNONYMY: Chamberlin and Ivie’s female holotype of I. barrowsi was placed in I. peltifer by Chickering (1969: 146) but actually belongs to I. velox instead. Chickering apparently did not consider the possibility that I. indressus could be a widespread species.

Figures

FIGURES 100–111. Ischnothyreus velox Jackson, male. 100. Carapace, dorsal view. 101. Sternum, ventral view. 102. Carapace, anterior view. 103. Same, lateral view. 104. Mouthparts, ventral view. 105. Habitus, lateral view. 106. Abdomen, dorsal view. 107. Same, ventral view. 108, 109. Left palp, prolateral view. 110. Same, ventral view. 111. Same, retrolateral view.

FIGURES 112–120. Ischnothyreus velox Jackson, male. 112, 119. Left palp, prolateral view. 113. Same, ventral view. 114, 120. Same, retrolateral view. 115. Left embolus, prolateral view. 116. Same, ventral view. 117. Same, retrolateral view. 118. Same, distal view.

FIGURES 121–132. Ischnothyreus velox Jackson, female. 121. Carapace, dorsal view. 122. Same, anterior view. 123. Habitus, lateral view. 124. Sternum, ventral view. 125. Habitus, dorsal view. 126. Abdomen, ventral view. 127, 128, 130. Genitalia, ventral view. 129. Same, dorsal view. 131. Postepigastric scutum, ventral view. 132. Copulatory opening, ventral view.