Order PARACHELA
Compiler and date details
September 2013 - Introductions, Dr S. Claxton, Camden, NSW & Dr Reinhardt Kristensen, University of Copenhagen, Denmark
Introduction
This order is characterised by the extreme reduction of head appendages. Cephalic papillae are absent; the main and secondary branches of the diploclaws are generally united, the primary branch being attached to the secondary branch; and placoids (macro and microplacoids) nearly always present. The structural homologues of the heterotardigrade cephalic papillae were described in the genus Halobiotus by Kristensen (1982) and in Paradiphascon by Dastych (1992).
General References
Dastych, H. 1992. Paradiphascon manningi gen. n. sp. n., a new water-bear from South Africa, with the erecting of a new subfamily Diphasconinae (Tardigrada). Mitteilungen des Hamburgerischen Zoologisches Museums und Instituts 89: 125-139
Kristensen, R.M. 1982. The first record of cyclomorphosis in Tardigrada based on a new genus and species from Arctic meiobenthos. Zeitschrift für Zoologische Systematik und Evolutionsforschung 20: 249-270
History of changes
| Published | As part of group | Action Date | Action Type | Compiler(s) |
|---|---|---|---|---|
| 23-Sep-2013 | TARDIGRADA | 19-Sep-2013 | MODIFIED | |
| 19-Aug-2010 | 19-Aug-2010 | MODIFIED | ||
| 12-Feb-2010 | (import) |