OSTRACOD RESEARCH

at the Lake Biwa Museum, Japan


Robin James Smith

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Genus Schellencandona Meisch, 1996

Superfamily: Cypridoidea Baird, 1845
Family: Candonidae Kaufmann, 1900
Subfamily: Candoninae Kaufmann, 1900

One species has been reported from Japan:

1. Schellencandona yakushimaensis Smith & Kamiya, 2006

Show synonymy list

2006 Schellencandona yakushimaensis n. sp. - Smith & Kamiya: 347-349, figs 3f & g, 12 & 13, Appendix.
2011 Schellencandona yakushimaensis Smith & Kamiya, 2006 - Martens & Savatenalinton: 71.
2012 S. yakushimaensis Smith & Kamiya 2006 - Karanovic: 246-247.
2012 S. yakushimaensis Smith & Kamiya, 2006 - Karanovic & Lee: 35, Appendix 1.

Status: full synonymy list

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Left side view of a Schellencandona yakushimaensis, length about 0.5 mm.


Additional figures in: Smith & Kamiya 2006 (carapace and appendages).
Habitat: Springs.
Mode of life: Benthic.
Reproductive mode: Asexual. Males unknown.
Known distribution: Yakushima, Kagoshima Prefecture.

References:
Karanovic, I. 2012. Recent Freshwater Ostracods of the World. Springer, 608pp.

Karanovic, I. & Lee, W. 2012. A review of candonid ostracods (Crustacea: Ostracoda: Podocopida) from East Asia, with descriptions of five new species from South Korea. Zootaxa, 3368, 7-49.

Martens, K. & Savatenalinton, S. 2011. A subjective checklist of the Recent, free-living, non-marine Ostracoda (Crustacea). Zootaxa, 2855, 1-79.

Smith, R. J. & Kamiya, T. 2006. Six new species of fresh and brackish water ostracods (Crustacea) from Yakushima, Southern Japan. Hydrobiologia, 559, 331 - 355.


Key characters Schellencandona yakushimaensis
Carapace - ventral valve overlapLeft valve overlaps right along ventral margin
Carapace - margin structure - septaNo septa present
Carapace - margin structure - ridges on inner calcified lamellaNo ridges
Carapace - dorsal view - female with brood pouchBrood pouch not visible
Carapace - lateral view - ventral marginVentral margin approximately straight to concave
Carapace - lateral view - valve heightLeft and right valves similar height
Carapace - internal viewAnterior calcified inner lamella wider than posterior one
Carapace - ornamentation - denticlesNo denticles near ventral margin
Carapace - ornamentation - sulcusNo sulcus
Carapace - ornamentation - surfaceSurface smooth
Carapace - width/length ratio (w/l)Less than 0.4 (slender species)
Antennule - segmentsSeven moveable segments
Antennule - Rome organNo Rome organ
Antenna - exopoditeExopodite reduced to small segment
Antenna - swimming setaeNo swimming setae present
Fifth limb - morphologyMaxilliped
Sixth limb - segmentsFive segments
Sixth limb - setae on first segmentOne seta
Sixth limb - h3 seta on final segmentH3 seta short; much shorter than half length of claw
Seventh Limb Cleaning limb, with three setae at end
Seventh Limb - segmentsFour segments
Seventh Limb - first segmentTwo setae
Caudal ramusElongate ramus with two claws and two setae
Caudal ramus - attachmentWith no loops