Candona neglecta Sars 1887

Rausch, Lea & Stoica, Marius, 2019, AN EARLY PLEISTOCENE ANOMALOHALINE WATER OSTRACOD FAUNA FROM LAKE DEPOSITS OF THE HOMO ERECTUS-BEARING KOCABAŞ LOCALITY (SW TURKEY), Acta Palaeontologica Romaniae 15 (2), pp. 41-69 : 4-5

Candona neglecta Sars 1887

1887 Candona ne- - Sars, pp. 279-288, pl. 15, glecta n. sp. figs. 5-7, pl. 19, figs.1-21.

1969 Candona ne- - Diebel & Pietrzeniuk, glecta Sars par- p.473, pl. 7, figs. 6-8.

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1980 Candona ne- - Freels, p. 94, pl. 16, figs. glecta Sars 12-19.

2000 Candona ne- - Meisch, p. 77, figs. 26 Aglecta Sars C, 27A-B.

2001 Candona ne- - Tunoğlu & Ünal, p. 176, glecta Sars pl. 3, fig. 1.

2005 Candona ne- - Pipík & Bodergat, p. 290, glecta Sars pl. 2, figs. 1-5.

2005 Candona ne- - Matzke-Karasz & Witt, p. glecta Sars 120, pl. 1, figs. 6-7.

2008 Candona ne- - Fuhrmann, pl.2, figs. 2a-d. glecta Sars

2012 Candona ne- - Fuhrmann, p. 32, pl. 10, glecta Sars figs. 1a-f, 2a-d.

Description. The highly variable but usually elongated carapace shows an almost straight dorsal margin with a sloping to the anterior end. The ventral margin is concave. Form the dorsal view, the anterior end is slightly pointed rather than the posterior. The left valve (LV) overlaps the right valve (RV) at both ends. Similar to Candona angulata , this species shows a fine reticulate pattern in the posterior part, on the otherwise smooth valve. A number of close – set and curved anterior marginal pore canals are present. The muscle scar forms a row of three scars with a larger elongated scar above. Sexual dimorphism is occurring. The male carapace is longer and the ventral concavity is more pronounced. Whenever valves are transparent, clear imprints of the male sexual organ can be noticed on the outer distal subdivided lobe. Dimension: Male: L = 1.2- 1. 5 mm; H = 0.6-0. 8 mm; Female: L = 1.1-1. 2 mm; H = 0.6-0. 7 mm.

Remarks. Different juvenile stages of C. neglelcta can be found in large numbers in freshwater sediments and usually been described and summarised under the name “ Candoniella ” (Dan Danielopol personal communication).

Ecology. Candona neglecta occurs in a wide range of aquatic habitats and prefers slightly cold water but can tolerate temporary increase in temperature beyond 20 °C. It has been reported from coastal-and inland waters with a salinity range of 0.5 -16‰ ( Meisch, 2000). In lakes it has been observed from the shallow littoral zone down to depths of 311 m (Lago Maggiore, Italy; Meisch, 2000). Together with Cyprideis . ex. gr. torosa and Ilyocypris gibba (Ramdohr) it has been described from freshwater assemblages from the Romanian stage of the Slănicul de Buzău section in the Dacian Basin ( Van Baak et al., 2015).