Bowie shakeit Jäger, 2022

Omelko, Mikhail M. & Fomichev, Alexander A., 2024, New and poorly known species of Bowie Jäger, 2022 (Araneae: Ctenidae) from Southeast Asia, Zootaxa 5543 (3), pp. 383-403 : 395-399

Bowie shakeit Jäger, 2022

( Figs 42–57 , 68–69 )

B. shakeit Jäger, 2022: 165 , figs 745–748, 775–780 (♂ ♀), not examined.

Material examined. MALAYSIA: Sabah State: 2♂, 1♀ ( IBSS), Borneo, environs of Tawau [4°24’N, 117°53’E], 300 m, 30 August–7 September 1994, A.M. Emelyanov leg.

Diagnosis. Males of Bowie shakeit closely resemble those of B. criminalworld by the shape and size of RTA as well as tegular apophysis (TA) but can be distinguished by 1) retro-proximal cymbial outgrowth (RPO) extending RTA in ventral view (vs. not extending; cf. Fig. 47 and Jäger 2022: fig. 769), 2) tegular hump (TH) touching tegular apophysis (TA) (vs. not touching; cf. Fig. 51 and Jäger 2022: fig. 769). Females of Bowie shakeit resemble those of B. criminalworld by the shape of median plate (MP) but can be easily distinguished by widely spaced vulval folds (VF) (vs. almost touching each other; cf. Fig. 56 and Jäger 2022: fig. 774). For extended diagnosis see Jäger (2022).

Description. Male ( Figs 42–43 ). Total length 16.20. Prosoma 9.03 long, 6.68 wide. Opisthosoma 6.90 long, 4.30 wide. Prosoma dark brown, with light brown median band, widened and bearing two dark spots nearly ocular area. Lateral bands absent. Fovea thin, black. Clypeus light brown. Chelicerae dark brown, with 3 promarginal and 4 retromarginal teeth, denticles absent. Sternum light brown, without pattern. Labium dark brown. Endites dark brown with yellow distal edge. Dorsal part of opisthosoma yellowish with poorly visible cardiac mark and series of black spots. Lateral sides of opisthosoma greenish yellow. Ventral part of opisthosoma dark gray with yellow spots forming single V-mark. Spinnerets yellow ventrally, dark brown laterally.

Eye diameters: AME 0.38, ALE 0.24, PME 0.47, PLE 0.37; interdistances: AME–AME 0.17, AME–ALE 0.41, PME–PME 0.23, PME–PLE 0.46, AME–PME 0.09, ALE–PLE 0.19. Clypeus height at AME 0.29, at ALE 0.75.

For palp and legs measurements see Table 11 . Palp coloration: femora, patellae, tibiae brown; cymbium dark brown. Legs coloration: femora I–IV brown with dark brown blurry spots dorsally, brown laterally, light brown ventrally. Patellae I–IV brown. Tibiae I–II brown proximally, light brown with short white setae distally; III–IV brown. Metatarsi I–IV dark brown. Tarsi I–IV brown. For palp and legs spination see Table 12 .

Palp as shown in Figs 46–53 . RTA arising from the middle of tibia, short, curved, with pointed tip in ventral view. Cymbium with large, blunt retro-proximal cymbial outgrowth (RPO). Tegulum (Te) with rounded hump (TH). Tegular apophysis (TA) oval, originating in a 5.30 o’clock position. Conductor (C) large, membranous. Embolus (Em) originating from tegulum in 7-o’clock-position, short, with pointed tip. Embolus with large basal embolic hook (EH).

Female. ( Figs 44–45 ). Total length 13.99. Prosoma 7.62 long, 5.93 wide. Opisthosoma 6.46 long, 3.92 wide. Prosoma brown, with light brown median band, widened and bearing two dark spots nearly ocular area. Lateral bands poorly visible. Fovea thin, black. Clypeus light brown. Chelicerae dark brown, with 3 promarginal and 4 retromarginal teeth, denticles absent. Sternum light brown, without pattern. Labium dark brown. Endites brown with yellow distal edge. Dorsal part of opisthosoma dark gray with distinct yellowish cardiac mark and series of dark brown transversal stripes. Lateral sides of opisthosoma dark gray. Ventral part of opisthosoma dark gray with yellow spots forming single V-marks. Spinnerets yellow with brown lateral sides.

Eye diameters: AME 0.37, ALE 0.23, PME 0.44, PLE 0.41; interdistances: AME–AME 0.22, AME–ALE 0.46, PME–PME 0.24, PME–PLE 0.52, AME–PME 0.11, ALE–PLE 0.15. Clypeus height at AME 0.30, at ALE 0.71.

For palp and legs measurements see Table 13 . Palp coloration: all joints light brown. Legs coloration: femora I–IV light brown. Patellae I–IV light brown. Tibiae I–II light brown; III– IV light brown with poorly visible semi-rings. Metatarsi I–II light brown; III–IV light brown with poorly visible semi-rings. Tarsi I–IV light brown. For palp and legs spination see Table 14 .

Female genitalia as shown in Figs 54–57 . Epigyne slightly longer than wide. Median plate (MP) widest posteriorly. Lateral teeth (LT) comparatively short, located posterior of median plate, with pointed tips. Spermathecae (Sp) small, kidney-shaped, almost touching each other.

Notes. The species has been previously known from a single record from Maliau Basin ( Sabah Prov. of Malaysia). The new record is located ca. 100 km to the east of the type locality. Because only its copulatory organs have been illustrated by black-and-white drawings only, we provide digital photos along with the redescription here.

Distribution. Borneo, Malaysia, Sabah Prov. ( Figs 68–69 ).

Figures

FIGURES 42–45. Habitus of male (42–43) and female (44–45) of Bowie shakeit Jäger. 42, 44—dorsal; 43, 45—ventral. Scale bars: 2 mm.

FIGURES 46–53. Palp (46–49) and bulb (50–53) of male of Bowie shakeit Jäger. 46, 50—prolateral; 47, 51—ventral; 48, 52— retrolateral; 49—dorsal; 53—apical. Scale bars: 46–49 = 0.5 mm; 50–53 = 0.2 mm.Abbreviations: C—conductor, EH—embolic hook, Em—embolus, RPO—retro-proximal cymbial outgrowth, RTA—retrolateral tibial apophysis, TA—tegular apophysis, Te—tegulum, TH—tegular hump.

FIGURES 54–57. Epigyne of Bowie shakeit Jäger. 54—intact, ventral; 55—macerated, ventral; 56—internal genitalia, dorsal; 57—ditto, posterior. Scale bar: 0.2 mm.Abbreviations: FD—fertilization duct, LT—lateral tooth, MP—median plate of epigyne, Sp—spermatheca, VF—vulval folds.

FIGURES 68–69. Collection localities of the studied Bowie species. Circle—Bowie catopuma sp. nov.; star—Bowie musang sp. nov.; diamond—Bowie neukoeln Jäger; triangle—Bowie tangalunga sp. nov.; inverted triangle—Bowie shakeit Jäger; square—Bowie hosei (F.O. Pickard-Cambridge). The frame on Fig. 69 refers to the content of Fig. 68.