Genus Candona Baird, 1845

Museums

Regional Maps

• Candona Baird, W. 1845. Arrangement of the British Entomostraca, with a List of Species, particularly noticing those which have as yet been discovered within the bounds of the Club. Transactions of the Berwickshire Naturalist Club 74(2): 145-158 [152].

  Type species:

   Cypris candida Müller, 1776 by original designation.

Distribution

Original AFD Distribution Data

Palaearctic Region

Diagnosis

Carapace subtriangular, subreniform, or subtrapezoidal. Valve surface not ornamented, but covered with pronounced warts from which setae originate. Inner calcified lamella always narrow, i.e. never more than 20% of total L. Left valve overlaps right valve. Marginal pore canals short, straight, never branched. Antennula 7-segmented. Coxa and basis fused with both CB setae present. Exopod reduced to two long setae. Endopod 6-segmented. En1 and En2 each with only one anterior seta. En3 and En4 each with two anterior and one posterior seta. En5 with two anterior and two posterior setae (En5d seta present), alpha seta present. En6 with most posterior seta transformed into claw, most anterior seta transformed into aesthetasc. Antenna sexually dimorphic: in male protopod 4-segmented, in female 3-segmented. Male sexual bristles present. Claws G1 and G3 in male reduced, seta z2 transformed into claws, seta z1 most usually also transformed into claw (which is subequally long as z2, or at the most 2/3 of its L). Sometimes z1 seta-like, but much longer than terminal segment; z3 always seta-like. In both sexes exopod transformed in plate with one long and two short setae. Mandibula with total of eight rays in exopod; palp 4-segmented with two setae externally on second and three setae on penultimate segment. Second segment internally with 4+2 or 5+2 setae. Terminal segment with two claws, central one narrowly fused with segment. Gamma seta plumed or smooth. Terminal segment on maxillula rectangular. Vibratory plate on first thoracopod with two rays. Male with transformed palps. Second thoracopod 5-segmented. Basal segment with one seta. Third thoracopod 4- or 5-segmented. Basal segment with two setae (d1 and dp); terminal segment with two long (Th2 and Th3) and one short (Th1) seta, which is never shorter than terminal segment itself. Caudal ramus with both claws and both setae present. Posterior seta always reaches at least distal end of posterior margin, usually much longer. Part "g" on hemipenis well sclerified. Lobes "a" and "h" present. Zenker's organ with seven whorls of spines. Female genital lobe with or without extension.

Diagnosis References

Karanovic, I. 2006. Recent Candoninae (Crustacea, Ostracoda) of North America. Records of the Western Australian Museum, Supplement 71: 1-75 [4]

General References

Karanovic, I. 2006. Recent Candoninae (Crustacea, Ostracoda) of North America. Records of the Western Australian Museum, Supplement 71: 1-75 [4]

Meisch, C. 2000. Freshwater Ostracoda of Western and Central Europe. Heidelberg, Berlin : Spektrum Akademischer Verlag, Gmbh. Vol. 8/3 pp. 1-522. [63]

History of changes