Table 4 









TABULATION 









FORM OF 

 SUTURES 



TYPE OF 

 ARCH AEO PYLE 



OTHER 

 SPECIAL 

 FEATURES 



OVERALL 

 SHELL 

 FORM 



KNOWN 



STRATIGRAPHIC 



RANGE 





GENUS 



< 



| 



5 2 



°" 



1 s 



| = 



c 0. 



Additional 



Plales 



llf present) 





Rhoetogonyoulax 



' 



1 



6 



6 



6 



1 



1 







LOW RIDGES OR 



INDETERMINABLE 



EPITRACTAL 



SPINDLE SHAPED 

 SHELL 



PROXIMATE 



U. Triassic (Rhaelian) 





Gonyaulacysla 



3-4 



0-1 



6 



6 



6 



1 



1 



0-1 p.v. Ventral 

 plates sometimes 

 present 



CRESTS OR LINES 

 OF SPINESIHEIGHT 

 LESS THAN 1/4 

 SHELL DIAMETER) 



PRECINGULAR 



APICAL HORN OFTEN 



PRESENT 



PROXIMATE 



M. Jurassic (Bajocian) to 

 U. Cretaceous (Senonian) 





Meiourogonyaulax 



< 



0- 1 



6 



6 



5-6 



0- 1 





0- 1 p.v. 



LOW RIDGES 

 OR CRESTS 



APICAL 







PROXIMATE 



M.-U. Jurassic 

 (Balhonian-?Tilhon.an) 









Ctenidodinium 



3-4 



0-1 



6 



6 



6 



1 



1 



0-1 p.v. 



CRESTS 



CINGULAR 



HIGH CREST POSTERIOR 

 TO CINGULUM: NO 

 CREST ON ANTERIOR SIDE 



PROXIMO- 

 CHORATE 



M.- U. Jurassic 

 (Callovian - Oxfordian) 





Acanthogonyaulax 



3-4 



0- 1 



6 



6 



6 



1 



1 







LINES OF 

 SPINES 



PRECINGULAR 



GENERAL SPINE COVER 



PROXIMATE 



U. Jurassic 



(Oxfordian- Kimmeridgian) 





Wonaeo 





Not determined in detail 





LOW RIDGES 

 EXCEPT ALONGSIDE 

 CINGULUM 



CINGULAR 



HIGH, FRINGE LIKE 



CRESTS BORDERING 



CINGULUM 



PROXIMO- 



CHORATE 



U. Jurassic 

 (Oxfordian -Tithonian) 





Pluriorvolium 



?5 



2 



6 



?6 



6 



1 



1 



1 p.v., up to 7 

 posterior circle 



plates 



LOW RIDGES 



? BY LOSS OF ANTERIOR 

 VENTRAL SURFACE 







PROXIMATE 



U. Jurassic 

 (U. Oxfordian) 





Leptodinium 



4 







6 



5-6 



5 



1 



1 







CRESTS OR LINES 

 OF SPINES (HEIGHT 

 LESS THAN 1/4 

 SHELL DIAMETER) 



PRECINGULAR 





PROXIMATE 



U. Jurassic 

 (Oxfordian)- Oligocene 









Belodinium 





Not determined in detail 



DELICATE CHESTS 



APICAL 



APICAL HORN 

 ANTAPICAL PER1COEL 



PROXIMATE 



U. Jurassic 

 (Tithonian) 









Dichadogonyoulax 



3-5 



0-?l 



6 



6 



5-6 



1 



1 



Ventral plates 

 present 



CPESTS OR 

 IINE5 OF SPINES 



EPITRACTAL 







PROXIMATE 



U. Jurassic 

 ( Partlandian) 





Heslertonia 



3-4 



0-1 



6 



6 



6 



1 



1 



0-1 p.v. 



VERY HIGH CREST5 

 (GREATER THAN 

 fa SHELL DIAMETER) 



PRECINGULAR 





CHORATE 



L.-U. Cretaceous 



( Hauterivian - Cenomanian) 











Heliodinium 



?3 



?0 



6 



?0 



6 



?0 



1 







DAGGER LIKE 

 SPINES ARISING 

 FROM LOW CRESTS 



PRECINGULAR 



SUTURAL SPINES 



FLAT, FLEXIBLE 



PROXIMO- 

 CHORATE 



L.- U. Cretaceous 

 (Hauterivian- Cenomanian) 









Hystriehodinium 





Not determined in detail 



LONG SPINES 

 ARISING FROM 

 POSITIONS OF 

 SUTURES 



PRECINGULAR 



SUTURAL SPINES 

 ROUNDED. STIFF 



PROXIMO- 

 CHORATE 



L.-U. Cretaceous 

 (Hauterivian -Senonian) 





Carpodinium 



? 



?6 



6 



? 



6 



9 











CRESTS 



PRECINGULAR 





PROXIMATE 



U. Cretaceous 

 lAptian - Albion) 









Microdinium 



1 



0-?l 



6 



6 



6 



1 



1 



Ventral plates 



sometimes 



present 



LOW CRESTS OR 

 LINES OF SPINES 



A PICAL 



EPITRACT SMALLER 

 THAN HYPOTRACT 



PROXIMATE 



L.- U. Cretaceous 

 (?U. Aptian-Turonian) 





Xiphophoridium 



?4 



1 



6 



?6 



6 



0-1 



1 







VERY HIGH CRESTS 

 ESPECIALLY BORD- 

 ERING CINGULUM 



AP ICAL 







PROXIMO- 

 CHORATE 



L.-U. Cretaceous 

 (?U. Aptian- Cenomanian 





Pioligonyoulox 



3-4 



1 



6 



6 



6 



1 



1 







CRESTS 



PRECINGULAR 



APICAL AND ANTAPICAL 

 PERICOELS 



BICAVATE 



U. Cretaceous 

 (Cenomanion)- Tertiary 





H ystrichosphaeropsis 



?3- 4 



?1 



6 



6 



6 



1 



1 







CRESTS WITH 

 SPINES AT NODES 



PRECINGULAR 



APICAL AND ANTAPICAL 



BICAVATE 



U. Cretaceous (Tertiary) 





Raphidodinium 





Not determined in detail 



LOW, BEARING FEW 

 VERY LONG SPINES 



NOT REPORTED 



SPINES STIFF UP TO 

 TWICE SHELL LENGTH 



CHORATE 



U. Cretaceous 





Glyphonodinium 



?1 







5 



6 



6 



1 



1 



Ip.V. 



LOW CRESTS 



APICAL 



EPITRACT SMALLER 

 THAN HYPOTRACT 



PROXIMATE 



Paleocene 





Eisenackia 



2-3 







6 



?6 



6 



2 



1 



Ventral plotes 



sometimes 

 present 



FOSSAE 



APICAL 





PROXIMATE 



Paleocene - L. Eocene 











Characteristics and stratigraphical distribution of fossil Dinoflagellate 

 cyst genera having a tabulation according with the Gonyaulax pattern. 



