AMMONITES AND NAUTILOIDS OF WADI HAJAR 

 Campana, 1904, was a replacement name (a nom. nor.)]. 



Subgenus TARAMELLICERAS Del Campana, 1904 



Taramelliceras (Taramelliceras) pseudoflexiiosum 



(Favre, 1875) PI. 1, figs 1,2 



1846 Ammonites flexuosus costatus Quenstedt: 126, pi. 9. fig. 1 . 



1875 Ammonites flexuosus Miinster; Favre: 25, pi. 1, figs 13, 14. 



1876 Ammonites (Oppelia) flexuosus Munster; Favre: 40, pi. 3, 

 fig. 6. 



1877 Ammonites pseudoflexuosus Favre: 29, pi. 2, figs 9, 10: pi. 

 3,fig. 1. 



1887 Ammonites flexuosus costatus Quenstedt: 904, pi. 97, fig. 



10. 

 1 893 Neumayria pseudoflexuosa (Favre); Choffat: 23, pi. 1 6. figs 



15-17. 

 1928 Taramelliceras pseudojlexuosum (Fawie): Spalh: 141, pi. 



18, fig. 2. 

 1 955 Taramelliceras ( Taramelliceras) pseudoflexuosum (Favre); 



Holder: 1 17, figs 115-1 19, pi. 19, fig. 23. 

 71959 Taramelliceras pseudoflexuosum (Favre); Collignon: pi. 



99, fig. 374. 



Material. Two specimens, CA703-04, from the Breadloaf Con- 

 cretions in the Kilya Member, on the east side of Wadi Arus, and 

 three, CA 1052-54, from doggers 8.5 m above the base of the Kilya 

 Member in Wadi Kilya. 



Description. One of the small specimens from Wadi Arus is 37 

 mm diameter, is partly crushed, and has half a whorl of body- 

 chamber; the other is a short fragment of a smaller whorl. A larger 

 example from Wadi Kilya is crushed flat, so the venter is not seen, 

 and is part of a whorl at about 60 mm diameter; the other two are 

 small fragments. The whorls are very involute. The ribs are flexuous; 

 most bifurcate at the backwards bend at the middle of the whorl side, 

 where some intercalated secondaries also start; the secondary ribs 

 swing forwards and each has a small ventro-lateral swelling or 

 tubercle and ends in a small mid-ventral tubercle. 



Remarks. These specimens are like the smaller whorls of the 

 examples figured by Spath (1928: pi. 18, fig. 2) and Holder (1955: 

 pi. 19, fig. 23).The species was recorded by Spath from the Eudoxus 

 Zone in Cutch, and by Holder (1955: 140) from beds equivalent to 

 the Eudoxus and Beckeri Zones in southern Germany. 



Occurrence. Lower marly part of the Kilya Member, Naifa 



37 



Formation, east side of Wadi Arus and Wadi Kilya; Beckeri Zone, 

 Upper Kimmeridgian. 



Taramelliceras (Taramelliceras) cf. intersistens 



Holder, 1955 PI. 1. figs 3, 4 



1955 Taramelliceras intersistens Holder: 1 16, pi. 19, fig. 27. 



Material. Four specimens, CA705-08, from the Breadloaf Con- 

 cretions in the Kilya Member, east side of Wadi Arus. 



Description. All are fragments of specimens up to 60 mm 

 diameter. The whorls are involute and compressed, and have a small 

 umbilicus. Sinuous striae on the inner part of the whorl strengthen 

 into curved forwardly inclined ribs on the outer part of the whorl and 

 are only slightly diminished in strength in the middle of the venter. 

 The smallest whorl visible (25 mm diameter) is more striate through- 

 out. No tubercles are developed. 



Remarks. These small specimens are associated with T. (T.) 

 pseudoflexuosum, from which they differ in being striate on the 

 inner half of the whorl and in lacking the row of mid-ventral 

 tubercles. A similar striate to fine-ribbed specimen from the Beckeri 

 Zone in southern Germany was given the name T intersistens by 

 Holder, which is the tentative identificafion for the Yemeni speci- 

 mens. 



Occurrence. Lower marly part of the Kilya Member, Naifa 

 Formation, east side of Wadi Arus; Beckeri Zone, Upper 

 Kimmeridgian. 



Taramelliceras (Taramelliceras) compsum (Oppel, 1863) 



PI. l.fig. 8 



1846 Ammonites flexuosus gigas Quenstedt: 126, pi. 9, fig. 2. 

 1863 Ammonites holbeini Oppel: 213. 

 1863 Ammonites compsus Oppel: 215, pi. 57, fig. 1. 

 1873 Oppelia holbeini (Oppel); Neumayr: 166, pi. 33, fig. 1. 

 71879 Oppelia hemipleura Fontannes: 47, pi. 6. fig. 6. 

 1887 Ammonites flexuosus gigas Quenstedt: 909, pi. 98, figs 8- 



12. 

 1 887 Ammonites flexuosus crassatus Quenstedt: 9 1 2, pi. 99, figs 



1,2. 

 1928 Taramelliceras cf compsum (Oppel); Spath: 137, pi. 18, 



fig. 10. 

 1 955 Taramelliceras (Taramelliceras) compsum (Oppel); Holder: 



1 10, figs 94-98, 100-1 10; pi. 19, fig. 22 (see for a more 



complete synonymy). 



PLATE 1 



Figs 1, 2 Taramelliceras (Taramelliceras) pseudoflexuosum (Favre), Kilya Member, lower maris (fauna 7). 1, CA703, Breadloaf Concretions, east cliff, 



Wadi Arus. 2, CAI053, 8.5 m above base of Kilya Member, Wadi Kilya. 

 Figs 3, 4 Taramelliceras (Taramelliceras) cf. intersistens Holder, Breadloaf Concretions, Kilya Member (fauna 7). ea.st cliff. Wadi Arus. 3a, 3b, CA705; 



4, CA707. 

 Fig. 5 Taramelliceras (Metahaploceras) subsidens (Fontannes), Kilya Member, upper marly part (fauna 8). Wadi Kilya. 5a, 5b, CA1()62. 

 Fig. 6 Lamellaprychus, ammonite bed, base of middle limestone part of Kilya Member (fauna 7). Naifa Cliff. 6a, 6b, SM F. 1 34 1 5. 

 Fig. 7 Glochiceras (Lmgulaticeras) pseudocarachleis (Favre), Breadloaf Concretions, Kilya Member (fauna 7). east cliff. Wadi Arus. 7a-7d, CA7 1 7; 7a, 



7b, xl,7c, 7d, x2. 

 Fig. 8 Taramelliceras (Taramelliceras} compsum (Oppel), near top of middle limestone part of Kilya Member (fauna 7), Wadi Kilya. 8a. 8b, CA 1 055, 



xO.59. 

 Fig. 9 Haploceras staszycii (Zejszner), Breadloaf Concretions, Kilya Member (fauna 7), east cliff. Wadi Arus. 9a-9d, CA709; 9a, 9b. x 1 , 9c, 9d. x2. 

 Fig. 10 Uhligites kraffti (Uhlig), 4 m above base of Mintaq Member (fauna II), eastern Jebel Billum. CA8I5, xl.5. 

 Fig. 11 Haploceras umbilicalum sp. nov., bed 57, Mintaq Member (fauna 13), Mintaq Salt Dome. 11a, lib, paratype, CA577, xO.69. 

 All figures in the plates are natural size, unless stated otherwise; asterisks (*) indicate the position of the end of the phragmocone. 



