20 



M.K. HOWARTH AND N.J. MORRIS 



WADI ARUS 



EAST SIDE 

 CLIFFS 



m 

 r 10 



^0 



WEST 

 SIDE 

 CLIFF 



MICROBIALITE BOULDERS, with: 



18 Pseudoclambites araense sp. nov. 



2 Baeticoceras morrisi sp. nov. 



1 Virgatosimoceras broilii (Schneid) 



1 Aulacosphinctes spitiensis (Uhlig) 



2 Aulacosphinctes natricoides (Uhlig) 

 1 Micracanthoceras fraudator (Zittel) 

 1 Himalayites sp. indet. 



1 Spiticeras gregoryi (Spath) 



1 Virgatosphinctes cf. broilii (Uhlig) 



7 Berriasella (B.I cf. oxycostata Mazenot 



2 Riasanites rjasanensis (Lahusen) 

 1 Blanfordiceras wallichi (Gray) 



Microbialite 

 Boulders 



Neocrassina spitiensis 

 (Stoliczka; Holdhaus) 



BREADLOAF CONCRETIONS, with: 

 2 Taramelliceras IT.) pseudoflexuosum (Favre) 

 4 Taramelliceras (T.) cf. insistens Holder 

 8 Haploceras staszycii (Zejszner) 



Glochiceras (Lingulaticeras) pseudocarachteis (Favre) 



Torquatisphinctes naifaensis sp. nov. 



Sutneria weidmanni Zeiss 



Pachysphinctes bathyplocus (Waagen) 



Pachysphinctes major Spath 



Idoceras ahwarense sp. nov. 



Idoceras cf. balderum (Oppel) 



Nebrodites hospes (Neumayr) 



Simaspidoceras argobbae (Dacque) 



Laevaptychus 



Lithacoceras (Subplanitesj mombassanum (Dacque) 



Lithacoceras sp. indet. 



Parainoceramus sp. 



Aulacomyella farquharsoni Cox 



Lowest 

 exposure 



Billum 

 Member 5 



Limestone pavement with many: 

 Streblites plicodiscus (Waagen) 

 Indet. Perisphinctids {? Torquatisphinctes) 

 Parainoceramus sp. 



Lowest exposure 



Fig. 16 Vertical sections comparing successions in the Kilya and Arus Members in the opposite east and west cliffs in Wadi Arus. 



