Borojevic, Boury-Esnault & Vacelet, 2000
Definition: Baerida with a choanoskeleton consisting of giant triactines, and/or of tetractines in no particular order, and/or of very numerous microdiactines. No traces of radial organization can be seen in the choanoskeleton. The cortical skeleton consists of triactines, giant diactines, and/or numerous microdiactines, and occasionally the basal actines of cortical giant tetractines. The choanoskeleton consists of scattered spicules similar to those observed in the cortex, to which numerous microdiactines can be added, or which can be entirely replaced by microdiactines. The exhalant aquiferous system is formed by ramified canals that have no tangential skeleton, being loosely or densely covered by harpoon-shaped pugioles and/or microdiactines.
Remarks: Baeriidae contains five nominal genera of which four are considered
valid: Leuconia Grant, 1833 (with junior synonym Baeria Miklucho-Maclay, 1870); Eilhardia Poléjaeff, 1883; Lamontia Kirk, 1895; Leucopsila Dendy & Row, 1913.
Source: Borojevic et al. 2002c
Genera represented in the area:
Leuconia Grant, 1833: Baeriidae in which the choanoskeleton consists of giant triactines and/or tetractines, lying without apparent order, and of very numerous microdiactines. A cavity equivalent to the atrium, localized only under the oscula, has a skeleton supported by tangential triactines. All the other exhalant canals have a skeleton composed
Species included:
Leuconia johnstoni
Leuconia nivea |
