Order APHRAGMOPHORA Tokioka, 1965
Introduction
Without ventral transverse muscle bands, coelom is entirely hollow and glandular structures are weakly developed on body surface.
Comprises four families: Sagittidae, Pterosagittidae, Bathybelidae and Pterokrohniidae.
History of changes
Note that this list may be incomplete for dates prior to September 2013.
| Published | As part of group | Action Date | Action Type | Compiler(s) |
|---|---|---|---|---|
| 12-Feb-2010 | (import) |