Bennelongia dedeckkeri Shearn 2012
Creators: name: Martens, Koen
name: Halse, Stuart
name: Schön, Isa
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Cyprididae
Bennelongia
Bennelongia dedeckkeri

description: Bennelongia dedeckkeri Shearn et al., 2012
Figs 23, 24 I-L
Bennelongia dedeckkeri sp. nov. – Shearn et al., 2012: 10-14, figs 4-5.
Material investigated
Dam at Kylena Well (Pilbara). Approximate coordinates: 22°06’00’’ S, 119°39’00’’ E (sample KIES 10). Collected on 23 Apr. 2006 by the authors.
Unnamed saline billabong N of Coolcalaya Rd (Murchinson, Gascoyne). Approximate coordinates: 27°48’28’’ S, 114°48’18’’ E (sample SIKE 2). Collected on 5 Jul. 2011 by the authors. Water chemistry at time of collecting: K25 8.8 mS/cm, pH 8.8, water temperature 11.0 ºC.
McNeil Claypan, Carnarvon (Murchinson, Gascoyne). Approximate coordinates: 24°52’06’’ S, 113°42’56’’ E (sample SIKE 9). Collected on 6 Jul. 2011 by the authors. Water chemistry at time of collecting: K25 0.19 mS/cm, pH 9.4, water temperature 10.8 ºC.
Roadside ditch 1, North-West Coastal Hwy, Minilya Station (Murchinson, Gascoyne). Approximate coordinates: 23°54’25’’ S, 114°01’45’’ E (sample SIKE 18). Collected on 7 Jul. 2011 by the authors. Water chemistry at time of collecting: K25 0.66 mS/cm, pH 7.4, water temperature 17.3 ºC.
Roadside ditch 2, North-West Coastal Hwy, (Murchinson, Gascoyne). Approximate coordinates: 23°54’25’’ S, 114°01’47’’ E (sample SIKE 19). Collected on 7 Jul. 2011 by the authors. Water chemistry at time of collecting: K25 0.69 mS/cm, pH 7.3, water temperature 17.3 ºC.
Lake Gregory, south of Halls Creek. Approximate coordinates: 20º12’ S, 127º27’ E. Collected by S. Halse on 29 May 1991 in fresh water (see Halse et al. 1998). One dissected ♀ (nr OS.260), with soft parts in a sealed slide and valves stored dry in micropalaeontological cavity slide (illustrated in Fig. 24 I-L).
Brief redescription
Smallest of the species described here, with females being only slightly longer than 1 mm.
Valves (Fig. 23 A-B, E-F) high, with greatest height situated well in front of the middle, dorsal margin evenly sloping towards the posterior side; ventral margin nearly straight. LV (Fig. 23A, E) with anteroventral il of medium size in lower half of valve, antero-dorsal il descending to about halfway along the antero-ventral il. RV (Fig. 23B, F) with antero-ventral lapel almost rectangular, but slightly skewed and bluntly pointed towards the ventral side (Fig. 23 C-D, G-H).
Carapace in dorsal and ventral views (Fig. 23 K-L) with greatest width in the middle, hirsute and heavily pitted, anteriorly without a rostrum.
Males not yet found in WA.
Measurements (all measurements in µm – see Table 1 for measurements of all specimens illustrated with SEM)
♀ (Pilbara, KIES10, WAMC52357): RV: L= 1110, H= 676. LV: L= 1190, H= 701.
♀ (Murchinson/Gascoyne, SIKE9, OC.3351): RV: L= 1125, H= 672. LV: L= 1188, H= 715.
Ecology and distribution
Bennelongia dedeckkeri Shearn et al, 2012 was first described from Queensland, from a sexual population. In WA it is not uncommon, but thus far only asexual populations have been found. To date B. dedeckkeri is the only species of the B. barangaroo group found in both the eastern and the western parts of Australia.
description: Published as part of Martens, Koen, Halse, Stuart & Schön, Isa, 2013, On the Bennelongia barangaroo lineage (Crustacea, Ostracoda) in Western Australia, with the description of seven new species, pp. 1-59 in European Journal of Taxonomy 66 on pages 48-50, DOI: 10.5852/ejt.2013.66, http://zenodo.org/record/3827594