AMMONITES AND NAUTILOIDS OF WADI HAJAR 



65 



its type area at Rogoznik, southern Poland, that species ranges from 

 the top of the Hybonotum up to the Fallauxi Zones in the Lower 

 Tithonian according to the records of Kutek & Wierbowski (1986: 

 292, table 2). Its presence lower in the Hybonotum Zone alongside/l. 

 longispinum seems to be problematical, because the two species are 

 very close in morphology, and it seems more likely that A. rogoznicense 

 is the phylogenetic successor of A. longispinum in which the whorls 

 have become more depressed and the two rows of tubercles are 

 slightly closertogether. However, there is nodoubt that A. rogoc«/ce«ie 

 ranges up to the top of the Tithonian and into the basal zone of the 

 Berriasian (Checa et al. 1986: 163), and the Upper Tithonian exam- 

 ples from the Internispinosum Zone (=low Upper Tithonian - see 

 Howarth, 1992: 600, fig. 2) of Argentina (Krantz, 1928; Leanza, 

 1980) and top Lower Tithonian and Upper Tithonian of Mexico 

 (Verma &Westermann, 1973) bear this out. In fact the two specimens 

 figured by Krantz and Leanza are especially fine examples of A. 

 rogoznicense, both showing the striae and low ribs or folds on the 

 surface of the shell that can also be seen on the Yemen example. 



Occurrence. Mintaq Member, Mintaq Salt Dome; Occitanica 

 Zone, Berriasian. 



Aspidoceras cf. taverai Checa, 1985 



PI. 10, fig. 3 



cf. 1985 Aspidoceras taverai Checa: 109, pi. 19, figs 1^; pi. 20, 

 fig. 1. 



Material. Four specimens: CA581 from bed 30, CA582 from 

 bed 57 and CA583-54 from bed 60, Mintaq Member, Mintaq Salt 

 Dome. 



Description. CA581 is an internal mould of half a whorl of 

 laterally crushed body-chamber, with parts of a large pair of 

 laevaptychi in place in the broken aperture at the larger end at a 

 diameter of 155 mm; there is no trace of the last septum of the 

 phragmocone at the smaller end; the crushing is such that the 

 original shape of the whorl cross-section cannot be seen, but at a 

 diameter of approximately 140 mm the distance between corre- 

 sponding lateral tubercles on opposite sides of the whorl measured 

 on the surface of the venter is 63 mm, and at this posifion the distance 

 between the umbilical and lateral tubercle rows is 19 mm. CA582 is 

 half a whorl of poorly preserved, but largely uncrushed phragmocone 

 75 mm diameter, with a roughly circular whorl section. CA583-84 

 are fragments of septate whorls 80-90 mm diameter. The whorl 

 section is rounded and only slightly depressed in all of them; the 

 ornament consists of umbilical and lateral tubercles of medium size, 

 and there are 8-9 tubercles per half whorl in both rows; there are no 

 ribs, but traces of striae are visible on CA583. 



Remarks. It is clear from the work of Checa (1985) that these 

 Berriasian bituberculate ammonites belong to either Aspidoceras 

 rogoznicense (Zejszner) or his new species A. taverai. From the 

 rough measurements given above, it can be esfimated that at 140 mm 

 diameter the whorl thickness is about 55-58 mm (definitely less than 

 63 mm), and at a whorl height of approximately 55 mm the distance 

 between the rows of tubercles is 19 mm. Such a whorl thickness is 

 too low for A. rogoznicense according to Checa's (1985: 223-24, 



363-64) measurements and graphs, but could belong to the some- 

 what less depressed A. taverai, and the distance between the rows of 

 tubercles is slightly too high for A. rogoznicense . For these reasons 

 it is more probable that these Mintaq ammonites are A. taverai rather 

 than A. rogoznicense. C\\e.ca(\9^5: 1 12, explanation of pi. 19, fig. 2) 

 and Checa et al (1986: 164) recorded A. taverai from the Upper 

 Tithonian, Durangites Zone, and from the Lower Berriasian, Jacobi 

 Zone, in SE Spain. 



Occurrence. Mintaq Member, Mintaq Salt Dome; Occitanica 

 Zone, Berriasian. 



Aspidoceras longispinum (J. de C. Sowerby, 1825) 



PI. 9, fig. 2; PI. 11, fig. 5 



1 825 Ammonites longispinus J. de C. Sowerby: 1 64, pi. 5 1 , fig. 2. 

 1875 Aspidoceras iphiceroides Waagen: 102, pi. 23, figs 1, 2. 

 1875 Aspidoceras wynnei Waagen: 103, pi. 21, fig. 5, pi. 22. 

 1875 Aspidoceras binodiferum Waagen: 105, pi. 24. 

 1880 Ammonites longispinus J. de C. Sowerby; Damon: pi. 14, 



fig. 2. 

 1888 Ammonites hispinosus Zieten; Quenstedt: 1031, pi. 118, 



figs 1-5. 

 1905 Aspidoceras somalicum Dacque: 149, pi. 17, fig. 1. 

 1910 Aspidoceras iphiceroides Waagen; Dacque: 24, pi. 1 , fig. 8; 



pi. 4, fig. 4. 

 1910 Aspidoceras kilindianum Dacque: 25, pi. 1 , fig. 9; pi. 3, fig. 



6. 

 1930 Acanthosphae rites aff. longispinum (J. de C. Sowerby); 



Spath: 58, pi. 7, fig. 6. 



1930 Acanthosphaerites aff. iphiceroides (Waagen); Spath: 60, 

 pi. 7, figs 1, 8. 



1931 Aspidoceras aff. acanthicum (Oppel); Spath: 624, pi. 123, 

 fig. 7. 



1931 Aspidoceras caroli Spath: 632, pi. 1 18, figs 2, 7. 



1931 Aspidoceras lerense Spath: 633, pi. 122, fig. 1. 



1931 Aspidoceras a.ff. hoplisum (Oppe\y, Spath: 634, pi. 118, fig. 



1. 

 1931 Aspidoceras iphiceroides (Waagen); Spath: 635. pi. 123, 



fig. 8. 

 1931 Aspidoceras mombasense Spath: 636 (nom. nov. for Spath, 



1930: pL 7, fig. 8). 

 1931 Aspidoceras wynnei Waagen; Spath: 638, pi. 124, fig. 7. 

 1931 Aspidoceras subwynnei Spath: 640, pi. 74, fig. 2; pi. 117, 



fig. 5; pi. 122, fig.' 5. 

 1959 Aspidoceras bispinosum (Zieten); Venzo: 164, pi. 1 2, fig. 4; 



pi. 14, figs 3,4. 

 1959 Aspidoceras longispinum var. antsalovensis Collignon: pi. 



110, figs 404, 405. 

 1959 Aspidoceras accmthicum (Oppel); Collignon: pi. 128, figs 



479, 480. 

 1959 Aspidoceras cf. subwynnei (Spath); Collignon: pi. 129, fig. 



484. 

 1959 Aspidoceras bertucati Collignon: pi. 130, fig. 486. 

 1959 Aspidoceras iphicerum (Oppel); Collignon: pi. 131, fig. 



490. 



PLATE 10 



Fig. 1 Aspidoceras rogoznicense (Zejszner), bed 36, Mintaq Member (fauna 1 3), Mintaq Salt Dome, la, lb, CA579, body-chamber, xO.59. 



Figs 2, 4 Orthaspidoceras avellamim Zittel. 2, lower marly part of Kilya Member, Wadi Kilya (fauna 7). CA 1 206. 4a, 4b, upper marly part of Kilya 



Member (fauna 8), Wadi Kilya, CA1204, xO.67. 

 Fig. 3 Aspidoceras cf. taverai Checa, body-chamber, with part of a large aptychus (Laevaptychus. with hinge-line uppermost) in the aperture; bed ^0. 



Mintaq Member (fauna 13), Mintaq Salt Dome, CA581, xO.76. 



