NMITA:Neogene Marine Biota of Tropical America

Specimen Details | Enlarge
Specimen Details | Enlarge
Specimen Details | Enlarge
Specimen Details | Enlarge

Thysanus navicula (Duncan, 1864)

Synonymy:

Holotype: BM(NH) R28766

Morphologic Description:
Meander series sinuosity: straight
Colony size: small (<10cm)
Attachment of skeleton: free-living
Epitheca: absent
Wall development between buds: never
Symmetry of bud geometry: bi-directional
Calice or valley width: large (10-15mm)
Calice relief: low (<2mm)
Calicular platform shape: u-shaped
Coenosteum: absent
Exothecal dissepiments: absent
Number of septal cycles: >3
Septal spacing (per 5mm): 6-12
Relative septa thickness: equal
Relative costae thickness: equal
Septal lobes: absent
Paliform lobes: present
Columella continuity: continuous
Columella width: <=1/4
Endothecal dissepiments: few
Wall structure: parathecal
Double or single wall: single

Distribution:
Late Miocene to Early Pliocene : Gurabo Fm., Rio Cana, Dominican Republic; Gurabo Fm., Rio Cana, Dominican Republic; Gurabo Fm., Rio Gurabo, Dominican Republic; Gurabo Fm., Rio Gurabo, Dominican Republic;
Early Pliocene : Mao Fm., Rio Cana, Dominican Republic; Gurabo Fm., Rio Gurabo, Dominican Republic;
Late Pliocene : Bowden Fm., Bowden Shell Beds, Jamaica; Bowden Fm., Bowden seacliff, Jamaica;
Late Pliocene to Early Pleistocene : 'Old Pera' beds, Pera Point, Jamaica;


Last updated on June 17, 1998-kgj.


[ NMITA homepage| Zooxanthellate Corals| List of zoox-coral taxa ]