Onomastus rattotensis, Benjamin, 2010

Benjamin, Suresh P., 2010, Revision and cladistic analysis of the jumping spider genus Onomastus (Araneae: Salticidae), Zoological Journal of the Linnean Society 159 (3), pp. 711-745 : 739-744

ONOMASTUS RATTOTENSIS SP. NOV.

( FIGS 26A–D , 27A–E , 28A–G )

Holotype: ♂ from Sri Lanka. Central Province, Knuckles range, along Rattota-Ilukkumbura Road , 900 m, 03–04.ix.2003, leg. Suresh P. Benjamin. Deposited in MHNG.

Paratype: ♀ from Sri Lanka. Data as above. Deposited in MHNG .

Etymology: Adjective, ‘from Rattota’, after the type locality.

Diagnosis: Males of O. rattotensis are readily separated from those of O. patellari s and O. indra by the absence of TA2. Separated from O. complexipalpis , O. kanoi , O. kaharian , and O. nigrimaculatus by the filiform conductor. Separated from O. pethiyagodai and O. quinquenotatus by the shape of the MA. Separated from O. nigricauda by the presence of a

REVISION AND CLADISTICS OF ONOMASTUS 743

well-developed, pleated MA. Females are difficult to diagnose, but may be separated by details of the internal genitalia.

Male holotype: Total length: 2.8; prosoma length: 1.4, width: 1.1. Legs I: femur 1.1, patella 0.5, tibia 3.2, metatarsus 2.3, tarsus 1.3. The spiders are green in nature. They turn whitish to pale yellow in alcohol. Prosoma oval, longer than wide. Opisthosoma longer than wide, lighter in colour. Leg I yellowish brown, leg II–IV light yellow. Legs are laterally without dark markings. Eyes surrounded by dark rings. Chelicerae yellow, with seven retromarginal and three promarginal teeth. Leg formula 1432. Leg spination: metatarsus V 4-2-2; tibia D 1-0-0, V 4-2-4; patella D 1-0-0; femur D 0-2-2. Palp: cymbium oval. Retrolateral tibial apophysis stout, tapering blunt end ( Figs 26A , 27B ).

Female paratype: Total length: 3.2; prosoma length: 1.4, width: 1.2. Legs 1: femur 1.3, patella 0.8, tibia 1.8, metatarsus 1.0, tarsus 0.4. Morphology similar to the male except for the following. Leg spination: metatarsus V 2-2-2; tibia V 2-2-2; femur D 0-1-0, P 2-3-1, R 2-3-1. Epigynum and vulva as in Figure 26C–E .

Distribution: Sri Lanka, central province, known only from the type locality. Probably endemic to Sri Lanka.

Other material examined: SRI LANKA: Central Province, Knuckles range, along Rattota-Ilukkumbura Road , 900 m, 03–04.ix.2003, 9♂, leg. Suresh P. Benjamin. Deposited in MHNG .

Figures

Figure 26. Onomastus rattotensis sp. nov. from Rattota, Sri Lanka (MHNG). A, left male palp, ventral view. B, ditto, retrolateral view. C, epigynum, ventral view. D, vulva, ventral view. E, ditto, dorsal view. Scale bars = 0.1 mm (D, E), 0.2 mm (A–C).

Figure 27. Scanning electron micrographs of Onomastus rattotensis sp. nov. from Rattota, Sri Lanka (MHNG). A, left male palp, retrolateral view. B, ditto, retrolateral view. C, ditto, prolateral view. D, female tracheal system, dorsal view. E, ditto, detail. Abbreviations: C, conductor; E, embolus; MA, median apophysis; MAP, mesal branch of MA; TA1, tegular apophysis 1; TA3, tegular apophysis 3. Scale bars = 100 Mm. The arrow points to the tracheae, which enter the prosoma.

Figure 28. Scanning electron micrographs of Onomastus rattotensis sp. nov. from Rattota, Sri Lanka (MHNG). A, left male palp, ventral view. B, MA and C, ventral view. C, F, MA tip, ventral view. D, profile of TA3, ventral view. E, profile of C tip, ventral view. G, serrated setae of the cymbium. Abbreviations: C, conductor; CY, cymbium; E, embolus; MA, median apophysis; MAP, mesal branch of MA; PA, patella apophysis; TA1, tegular apophysis 1; TA3, tegular apophysis 3. Scale bars = 10 Mm (B, E, F, G), 20 Mm (C, D), 100 Mm (A).