. Bulletins of American paleontology. Jurassic Ammonites of British Columbia: Smith and Tipper 23 Table I. âMeasurements of Phylloceras bonarellii Beuoni, 1900. All measurements are in mm. specimen no. D CD V WW WWD Hir- WH WHO WH GSC 98693 5 55 lively regarded as a new species that can only be prop- erly described when more material has been collected. Occurrence.â\n Europe, T. loscombi is the only spe- cies of Tragophylloceras to persist into the Upper Pliensbachian (Howarth and Donovan, 1964; Meister, 1989). The two specimens of Tragophylloceras now known from N
. Bulletins of American paleontology. Jurassic Ammonites of British Columbia: Smith and Tipper 23 Table I. âMeasurements of Phylloceras bonarellii Beuoni, 1900. All measurements are in mm. specimen no. D CD V WW WWD Hir- WH WHO WH GSC 98693 5 55 lively regarded as a new species that can only be prop- erly described when more material has been collected. Occurrence.â\n Europe, T. loscombi is the only spe- cies of Tragophylloceras to persist into the Upper Pliensbachian (Howarth and Donovan, 1964; Meister, 1989). The two specimens of Tragophylloceras now known from North America (from eastern Oregon and the Queen Charlotte Islands) are both of probable Late Pliensbachian age. Locality. âÂ¥.1'^. /l^eâprobably Kunae Zone (Late Pliensbachian) Suborder AMMONITINA Hyatt, 1889 Superfamily PSILOCERATACEAE Hyatt, 1867 Family CYMBITIDAE Buckman, 1919 Genus CYMBITES Neumayr, 1878 Metacymbites Spath. 1923. p. 76. Type species. âAmmonites globosiis Schubler in Zie- ten, 1832, p. 37, pi. 28, fig. 2 by original designation (Neumayr, 1878, p. 64). Remarks. âSmall involute to midvolute forms, with depressed or rounded whorl section. Smooth or very weakly ornamented. The last whorl commonly egresses and the aperture may be constricted and bear a ros- trum. Septal suture simple. Age and distribution.âThe genus has been reported from rocks that range in age from the Sinemurian to Pliensbachian. Often locally abundant at a given ho- rizon, it has been previously reported from Great Bri- tain (Donovan, 1957), Germany (Schindewolf 1961), Italy (Fucini, 1899), Portugal (Mouterde, Dom- mergues, and Rocha, 1983), Switzerland (Bettoni, 1900), France (Monestier, 1934), and the United States (Imlay, 1968). The genus appears to have been geo- graphically more widespread in the Pliensbachian than the Text-figure 25. âWhorl shape cross-sections for species of the Phylloceratidae and Cymbitidae. Figures are natural size unless oth- erwise indicated
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