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・ Aspidosperma parvifolium
・ Aspidosperma polyneuron
・ Aspidosperma populifolium
・ Aspidosperma pyricollum
・ Aspidosperma quebracho-blanco
・ Aspidosperma quebracho-blanco 'Pendula'
・ Aspidosperma ramiflorum
・ Aspidosperma spruceanum
・ Aspidosperma subincanum
・ Aspidosperma tomentosum
・ Aspidosperma triternatum
・ Aspidosperma ulei
・ Aspidosperma vargasii
・ Aspidospermidine
・ Aspidostemon
Aspidostephanus
・ Aspidotheliaceae
・ Aspidotis
・ Aspidotis californica
・ Aspidotis carlotta-halliae
・ Aspidotis densa
・ Aspiducha
・ Aspidura
・ Aspidura brachyorrhos
・ Aspidura ceylonensis
・ Aspidura copei
・ Aspidura deraniyagalae
・ Aspidura drummondhayi
・ Aspidura guentheri
・ Aspidura trachyprocta


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Aspidostephanus : ウィキペディア英語版
Aspidostephanus

| regnum = Animalia
| phylum = Mollusca
| classis = Cephalopoda
| subclassis = Ammonoidea
| ordo = Ammonitida
| superfamilia = Perisphinctaceae
| familia = Olcostephanidae
| subfamilia = Spiticeratinae
| genus = ''Aspidostephanus''
| genus_authority = Spath, 1925
| subdivision_ranks = Species
| subdivision =
*see text }}
''Aspidostephanus'' is an extinct cephalopod genus belonging to the ammonite subclass, included in the perisphinctacean family Olcostephanidae that lived during the earliest Cretaceous and possible latest Jurassic. Fossils of the genus have been found in France, the Balearics, North Africa, and Argentina.
The shell of ''Aspidostephanus'' is depressed with a broad smooth venter. Early whorls have strong lateral ribs with umbilical and lateral tubercles; later whorls smooth except for tubercles at the umbilicus. Whorl height increases with age. ''Aspidostephanus'' is similar to but broader than its close relative, ''Spiticeras''.
==References==

*


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Aspidostephanus」の詳細全文を読む



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