Английская Википедия:Hildoceratinae

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Шаблон:Short description Шаблон:Automatic taxobox

Hildoceratinae is an extinct subfamily of cephalopods belonging to the family Hildoceratidae. Ammonites of this subfamily had shells with elliptical or quadrate whorl section with keel or tricarinate, bisulcate venter. Ribs were variable, from falcate to strongly angled and from fine to strong. They can be interrupted by spiral groove in midlateral part of the shell. While some species can be smooth, strongly ribbed ones can have tubercules. Microconchs have short lapplets that is in its shape similar to the shape of growth lines in spiral midlateral groove.[1]

Genera

[1][2]

Alternative classification

Genera Praemercaticeras Venturi, 1981, Mercaticeras Buckman, 1913, Pseudomercaticeras Merla, 1932, Merlaites Gabilly, 1974, and Crassiceras Merla, 1932 have also been classified as belonging to a separate subfamily Mercaticeratinae Guex, 1974.[3]

Distribution

Members of this subfamily lived from the upper Pliensbachian to upper Toarcian stages of early Jurassic. Distribution has been worldwide.[1][2]

References

Шаблон:Reflist

Шаблон:Taxonbar


Шаблон:Jurassic-animal-stub Шаблон:Ammonite-stub

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег <ref>; для сносок Howarth2013 не указан текст
  2. ↑ 2,0 2,1 Bardin, J., Rouget, I., & Cecca, F. (2016). The phylogeny of Hildoceratidae (Cephalopoda, Ammonitida) resolved by an integrated coding scheme of the conch. Cladistics.
  3. ↑ Шаблон:Cite book
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