130 

 1961 



Oxynoticeras oxynotum (Quenstedt); Dean et al.\ pi. 66, 

 fig. 5 (holotype, Geol.-Pal. Institut, Tubingen, from 

 Wurttemberg, Germany). 



Range. Beds 472. 1^48 1 , Oxynotum Subzone; 4 specimens. 



Remarks. The lowest Oxynoticeras that are more involute and 

 flat-whorled than O. simpsoni occur in bed 472. 1 , which is therefore 

 the base of the Oxynotum Subzone. Better preserved O. oxynotum 

 occur higher up in beds 475.3 and 481 (PI. 4 fig. 4), and there are 

 several fragments of Oxynoticeras sp. indet. from beds 480. 482 and 

 483 consisting of large compressed whorls up to 260 mm diameter 

 that have acute venters and complex suture-lines. 



Other species of Oynodceras: 



lOxynoticeras aliaenum (Simpson, 1855: 85). 

 lOxynoticeras dejectum (Simpson, 1855: 85). 



The type specimens of both Simpson's species are lost, and the 

 species are not identifiable. 



Genus GLEVICERAS Buckman, 1918 



Gleviceras doris (Reynes, 1879) PI. 4, fig. 7 



1879 Ammonites doris Reynes: pi. 41, figs 13-15 (probably from 



France). 

 1914 Oxynoticeras doris (Reynes); Pia: 7, 30, pi. 1, fig. 1; pi. 8, 



fig.l. 



Range. Beds 476 and 485.2, Oxynotum Subzone; 3 specimens. 

 Gleviceras guibalianum (d'Orbigny, 1844) 



1844 

 1973 



1994 



Ammonites guibalianus d'Orbigny: 259, pi. 73, figs 1—4. 



Gleviceras subguibalianum (von Pia) (sic); Donovan & 



Forsey: 9, pi. 2, fig. 1 (lectotype of Ammonites guibalianus 



d'Orbigny, designated by Donovan & Forsey, from Nantua, 



France). 



Gleviceras guibalianum (d'Orbigny); Fischer: 66, pi. 17, 



fig. 2 (lectotype refigured). 



Range. Beds 484.1^499, Oxynotum to Aplanatum Subzones; 14 

 specimens. 



Remarks. Most specimens are large body-chambers, or frag- 

 ments thereof, up to 300 mm diameter. 



M.K. HOWARTH 

 Genus PARACYMB1TES Trueman & Williams, 1927 



Paracymbites dennyi (Simpson, 1843) 



1843 Ammonites dennyi Simpson: 9. 

 1843 Ammonites arctus Simpson: 10. 

 1909 Oxynoticeras dennyi (Simpson); Buckman: pi. 7, figs 1 



(lectotype, WM 470), 2, 3 (two paralectotypes). 

 1911 Oxynoticeras arctum (Simpson); Buckman: pi. 36 (holotype, 



WM471). 

 1966 Paracymbites dennyi (Simpson); Donovan: 3 15, pi. 53, figs 



5-12 (from Oxfordshire and Gloucestershire). 



Remarks. As revised by Donovan (1966), the holotype of this 

 species should have come from the lower part of the Raricostatum 

 Zone in Robin Hood's Bay, but no examples were found by Bairstow. 



Genus PAROXYNOTICERAS von Pia, 1914 



Paroxynoticeras salisburgense (Hauer, 1856) 



1856 Ammonites salisburgensis Hauer: 47, pi. 13, figs 1-3 

 (lectotype, designated Donovan & Forsey (1973: 9), from 

 Adneth. Austria). 



1914 Paroxynoticeras salisburgense (Hauer); Pia: 18. 73, pi. 1, 

 fig. 2; pi. 7, fig. 22; pi. 13, fig. 12. 



Range. Two probable examples of this species were found in bed 

 474.3, Oxynotum Subzone. 



Genus RADSTOCKICERAS Buckman. 1918 



Remarks. As well as the two species described below, two very 

 large fragments of Radstockiceras sp. indet. were found in beds 

 544.4 and 544.6; both are about 350 mm diameter and one of them is 

 septate up to about 300 mm diameter; a poorly preserved specimen 

 was also found in bed 548. 



In their revision of the holotype of Radstockiceras buvignieri, 

 Donovan & Guerin-Franiatte (in Fischer, 1994: 68) said that 

 Radstockiceras was a late oxynoticeratid that appeared in the 

 Jamesoni Zone (from the evidence of Tutcher & Trueman, 1925: 

 598, 642) and was not present in the Raricostatum Zone (which was 

 the supposed horizon at Radstock of Buckman's (1918: 288) holotype 

 of the type species of Radstockiceras). However, the four large 

 examples from bed 494 described below are a genuine record of 

 Radstockiceras from the Macdonnelli Subzone, Raricostatum Zone, 

 whatever may be held to be their specific determination. 



PLATE 5 



Fig. 1 Radstockiceras buvignieri (d'Orbigny). Bed 494, CA 3744. x 0.6; wholly septate. 



Fig. 2 Xipheroceras dudressieri (d'Orbigny). Bed 446.33, C.49336; the asterisk marks the probable end of the phragmocone. 



Fig. 3 Promicroceras planicosta (J. Sowerby ). Bed 45 1 , CA 3927. 



Fig. 4 Radstockiceras sphenonotum (Monke). Bed 544.4, CA 3758; wholly septate. 



Fig. 5 Xipheroceras ziphus (Zieten). Bed 45 1 . CA 3784; wholly septate. 



Fig. 6 Cymbites laevigatus (J. de C. Sowerby). Bed 448.1. CA3763; 6a, b, x 1; 6c, d, x 3; the last septa at the position shown are approximated and 



probably adult. 

 Fig. 7 Microderoceras birchi (J. Sowerby). Bed 433.3, CA 3977, x 0.5; a complete (?adult) specimen with a body chamber nearly Wi whorls long. 

 Fig. 8 Apoderoceras subtriangulare (Young & Bird). Bed 501.1. CA 3981; a septate fragment. 

 Fig. 9 Eoderoceras armatum (J. Sowerby). Neotype. probably from bed 497, C.67323, x 0.75. 

 All figures natural size, except Figs 1. 6c, 6d, 7 and 9. 



