Bennelongia dedeckkeri Shearn et al., 2012

Martens, Koen, Halse, Stuart & Schön, Isa, 2013, On the Bennelongia barangaroo lineage (Crustacea, Ostracoda) in Western Australia, with the description of seven new species, European Journal of Taxonomy 66, pp. 1-59 : 48-50

publication ID	https://doi.org/ 10.5852/ejt.2013.66
publication LSID	lsid:zoobank.org:pub:5270B024-84C1-4CD5-BC18-4AF37D2E1045
DOI	https://doi.org/10.5281/zenodo.3846930
persistent identifier	https://treatment.plazi.org/id/03A57B5B-DA7F-594C-9771-ECA0FBB9FE5A
treatment provided by	Carolina
scientific name	Bennelongia dedeckkeri Shearn et al., 2012
status

Treatment

Figs 23 View Fig , 24 View Fig I-L

Bennelongia dedeckkeri sp. nov. – Shearn et al., 2012: 10-14 View Cited Treatment , 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 View Fig I-L).

Brief redescription

Smallest of the species described here, with females being only slightly longer than 1 mm.

Valves ( Fig. 23 View Fig 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 View Fig ) 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 View Fig ) with antero-ventral lapel almost rectangular, but slightly skewed and bluntly pointed towards the ventral side ( Fig. 23 View Fig C-D, G-H).

Carapace in dorsal and ventral views ( Fig. 23 View Fig 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 View 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.