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Shell of these ammonites had quadrate whorl section with broad venter and strong keel in the center. Almost straight ribs were curving slightly forward at ventrolateral edge. Coiling has been evolute. It has evolved form genus
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fossils were found in Europe and north Africa. Only one (or two) species is known in the
Toarcian NW European domain, its diversity is higher in the Mediterranean faunal province.
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LACROIX, Pierre; LE PICHON, Jean-Pierre. Les
Hildoceratidae du Lias moyen et supérieur des domaines NW européen et téthysien: une histoire de famille. 2011.
657:
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HOWARTH, Michael K. The ammonite family
Hildoceratidae in the Lower Jurassic of Britain. Monograph of the Palaeontographical Society, 1992, 145.586: 1-106.
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M. K. Howarth 2013. Treatise on
Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.
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species from the
Transdanubian Mountain Range, Hungary. Collection Eötvös University, Budapest, Dep. Palaeontology
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444:"Les Harpoceratinae, Hildoceratinae et Paroniceratinae du Toarcien de la Vendée et des Deux-Sèvres (France)"
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is debated, as sometimes it is considered to be valid, while other authors consider it to be a synonym of
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412:"Lower Toarcian Ammonitida fauna and biostratigraphy of the Gerecse Mountains (Hungary)"
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from which it differs in morphology by broader whorls and straight ribs.
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Documents des
Laboratoires de Géologie de la Faculté des Sciences de Lyon
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416:Fragmenta Palaeontologica Hungarica
658:Early Jurassic ammonites of Europe
596:. You can help Knowledge (XXG) by
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422:: 1–48 – via ResearchGate.
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329:, during Falciferum subzone.
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321:that lived during the lower
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16:Genus of molluscs (fossil)
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103:Scientific classification
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410:Kovács, Zoltán (2012).
592:-related article is a
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555:Paleobiology Database
442:BĂ©caud, Marc (2006).
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663:Ammonites of Africa
238:Orthildaites orthus
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643:Ammonitida genera
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471:Taxon identifiers
344:and gave rise to
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291:Kovács, 2012
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272:O. douvillei
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231:Type species
216:Orthildaites
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25:Orthildaites
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333:Description
195:Subfamily:
150:Cephalopoda
637:Categories
590:Ammonitina
376:References
347:Hildoceras
288:O. becaudi
283:Guex, 1973
275:Haug, 1884
176:Ammonitida
163:Ammonoidea
156:Subclass:
494:Q23840515
366:O. orthus
341:Hildaites
325:stage of
319:ammonites
261:O. orthus
126:Kingdom:
120:Eukaryota
488:Wikidata
457:: 1–245.
323:Toarcian
182:Family:
140:Mollusca
136:Phylum:
130:Animalia
116:Domain:
32:Toarcian
547:2871009
534:1203809
521:4627598
354:Remarks
265:Buckman
252:Species
243:Buckman
222:Buckman
208:Genus:
169:Order:
146:Class:
267:, 1923
245:, 1923
224:, 1923
588:This
560:15290
529:IRMNG
508:63GSJ
447:(PDF)
594:stub
516:GBIF
37:Preęž’
503:CoL
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384:^
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