Bavia nessagyna Maddison, sp. nov.
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https://dx.doi.org/10.3897/zookeys.1004.57526 |
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lsid:zoobank.org:pub:320559CF-19B5-423C-B7FB-72555290241A |
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persistent identifier |
https://treatment.plazi.org/id/4C88D66A-AFC9-50DB-A8DB-96C11646C423 |
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scientific name |
Bavia nessagyna Maddison, sp. nov. |
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Bavia nessagyna Maddison, sp. nov. Figs 5 View Figures 4–35 , 6 View Figures 4–35 , 13 View Figures 4–35 , 21 View Figures 4–35 , 64-75 View Figures 64–75
Type material.
All from Malaysia: Sarawak: Lambir Hills Nat. Pk., and in UBCZ. Holotype: male IDWM.20005 from Bukit Pantu Trail, 4.2032°N, 114.0305°E to 4.2035°N, 114.0304°E, 210 m el. 5 April 2012 Maddison/Piascik/Ang WPM#12-135. Paratypes: Male SWK12-4726 from Inoue Trail, 4.2002°N, 114.0346°N, to 4.2004°N, 114.0342°E, 200 m el. 4 April 2012 Maddison/Piascik/Ang WPM#12-130; female SWK12-4087 from Inoue Trail, 4.1990°N, 114.0375°E to 4.1988°N, 114.0370°E, 120 m el. 1 April 2012 Maddison/Piascik WPM#12-113; female IDWM.20004 from Lepoh-Ridan Trail, 4.2022°N, 114.0279°E to 4.2019°N, 114.0278°E 170 m el. 2 April 2012 Maddison/Piascik WPM#12-124; female IDWM.20006 from Bukit Pantu Trail, 4.2028°N, 114.0305°E to 4.2032°N, 114.0305°E, 210 m el. 5 April 2012 Maddison/Piascik/Ang WPM#12-134; female IDWM.20003 from Pantu Trail, 4.2030°N, 114.0399°E to 4.2032°N, 114.0396°E, 150-160 m el. 6 April 2012 Piascik/Ang WPM#12-145.
Etymology.
From the Greek nessa, duck, and gyne, female, referring to the resemblance of the epigyne to a duck’s bill. Other names: In WPM’s lab notebooks the informal code for this species was “BVDUC-S”.
Diagnosis.
One of the more delicate Bavia , along with B. capistrata , having legs II-IV very much paler than I, and thus resembling Indopadilla . Its distinction from B. fedor is slight: the embolus of both appears as a curved and narrowing blade with a series of retrolateral teeth. The teeth are short, triangular, and closely spaced in B. nessagyna , but larger in B. fedor , appearing as broad pillars whose bases are well separate (photographs of holotype kindly supplied by J. Boone, Bishop Museum). In B. nessagyna the teeth are not on the embolus proper but on a TmA that parallels the embolus (Fig. 64 View Figures 64–75 ). In B. fedor it is unclear whether the teeth are on a TmA or on the embolus itself; Prószyński’s illustration ( Berry, Beatty and Prószyński 1997) shows no division into two processes, but it may be that they are closely adpressed. Even still, the overall shapes of the embolic division differ: broad at the base in B. nessagyna but abruptly narrowing; narrower at the base in B. fedor and narrowing more gradually. Epigyne with arcing ridges lateral to the openings in B. fedor ; without such a ridge in B. nessagyna . B. nessagyna differs from B. cf. capistrata in the distinct embolus, less contrasting markings, and the abdominal markings more transverse than longitudinal.
Description.
Male (based on holotype, specimen IDWM.20005). Carapace length 3.6; abdomen length 4.8. Carapace (Fig. 71 View Figures 64–75 ): Broad, seeming even broader because of small tuft of setae at widest point just posterior to PLEs. Integument of ocular area black, thorax dark brown, except in alcohol pale orange yellow area just behind the ocular area. Bands of cream coloured scales lie just posterior to and lateral to the ocular area; thorax with a few small spots of cream scales, the two posterior ones of which are prominent and well separated, as in B. capistrata . Clypeus dark and glabrous, but a disorderly fringe of long cream setae overhangs the chelicerae (Fig. 70 View Figures 64–75 ). Chelicerae simple and mostly vertical, dark, with cream setae that, with those of the clypeus, give the appearance of an unkempt moustache. At least two teeth on retromargin (paratype with 6). Palp as in Fig. 64 View Figures 64–75 ; embolus thin and accompanied by toothed TmA. Femur dark basally, but terminally is pale, as are all more distal segments. Endites with thumb-like lobe laterally (Fig. 6 View Figures 4–35 ). Legs II-IV notably paler than legs I, which bear annulae of white scales on patella and distally on tibia. Metatarsus I dark; tarsus pale. Ventral fringe of black setae beneath tibia and metatarsus I. Abdomen with dorsal markings primarily transverse, with four transverse pale bands separated by three dark bands.
Female (based on paratype IDWM.20003). Carapace length 3.3; abdomen length 5.9. Carapace as in male, but lacking tuft at widest point. Clypeus and Chelicerae as in male. Five retromarginal teeth. Legs similar to those of male, but with first leg not quite so dark, and without the ventral fringe so distinctly developed. Abdomen with only a hint of transverse bands, instead dominated by longitudinal stripes: a narrow central pale band flanked by wide dark bands. Epigyne with ECP beneath a posteriorly-projecting mound (Figs 66-67 View Figures 64–75 ).
Natural history.
All specimens from Lambir Hills were collected on big-leaved foliage (e.g., palms) except for IDWM.20004 whose collecting record says simply “foliage”.
Additional material examined.
One female from Malaysia: Sarawak: Lambir Hills Nat. Pk., Inoue Trail, 4.2002°N, 114.0346°E to 4.2004°N, 114.0342°E, 200 m el. 4 April 2012 Maddison/Piascik/Ang WPM#12-130. One male from Malaysia: Sarawak: Bako Nat. Pk., Mangroves, beach forest, 1.722°N, 110.446°E, 0 m el. 8 March 2012 Maddison/Piascik/Ang/Lee WPM#12-003.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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