Taxonomic revision of Cylindroporella ? lusitanica Ramalho, 1970: In search for the origins of the Family Dasycladaceae

A study of new material of Cylindroporella ? lusitanica Ramalho, 1970, from the Upper Jurassic (Oxfordian) strata of Portugal identified features not observed previously. This includes the pattern of its laterals, including the gametophores. The algal body plan is unique and justifies the taxonomic...

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Veröffentlicht in:The island arc 2017-05, Vol.26 (3), p.n/a
Hauptverfasser: Granier, Bruno R. C., Azerêdo, Ana C., Ramalho, Miguel M.
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Sprache:eng
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Zusammenfassung:A study of new material of Cylindroporella ? lusitanica Ramalho, 1970, from the Upper Jurassic (Oxfordian) strata of Portugal identified features not observed previously. This includes the pattern of its laterals, including the gametophores. The algal body plan is unique and justifies the taxonomic reassessment of this species and the introduction of Barattoloporellopsis n. gen. Furthermore this species is most likely a primitive Dasycladaceae, a “missing link” between the modern ones (starting from the Cretaceous times) and their Jurassic ancestors. ポルトガルの上部ジュラ系(オックスフォーディアン階)から採取された Cylindroporella ? lusitanica Ramalho, 1970 の新標本を検討したところ,従来,観察されていなかった特徴(ガメトフォアを始めとする藻体の側生枝の特異な配列パターン)が見出された.   新たに見出された藻体の構造は本種に特有のものであることにより,本種の分類学的位置を見直すべきであり,新属 Barattoloporellopsis に含めることを提唱する.  さらに,本種は原始的なカサノリ科である可能性が高く,白亜紀に出現したカサノリ科とジュラ紀の祖先をつなぐミッシング▪リンクとみなされる. With its unique body plan, this algal species is most likely a primitive Dasycladacean representative, a “missing link” between the modern ones (starting from the Cretaceous times) and their Jurassic ancestors.
ISSN:1038-4871
1440-1738
DOI:10.1111/iar.12176