Tentaculites is an extinct genus of conical fossils of uncertain affinity, class Tentaculita, although it is not the only member of the class. It is known from Lower Ordovician to Upper Devonian deposits[1] both as calcitic shells with a brachiopod-like microstructure[2] and carbonaceous 'linings'.[3][4] The "tentaculites" (i.e. tentaculita) are also referred to as the styliolinids.
Affinity
Tentaculites bellulus from the Middle Devonian of Wisconsin.
The taxonomic classification of tentaculitids is uncertain. Some grouped them with pteropods, but there is no modern support and only superficial similarity.[who?][5] They may also be related to other conical shells of uncertain affinity including cornulitids, Anticalyptraea, microconchids and trypanoporids.[6]Their shell microstructure has warranted their comparison with the brachiopods and phoronids,[2][7]and the possible Ediacaran lophophorate Namacalathus.[8]
Morphology
Sketch of a Tentaculites ornatus, Silurian.Tentaculitid from the New Creek Limestone (Lochkovian, Early Devonian) of New Creek, West Virginia.
Tentaculitids have ribbed, cone-shaped shells which range in length from 5 to 20 mm. Some species septate; their embryonic shell, which is retained, forms a small, sometimes spherical, chamber.[4]
Ecology
Some species are inferred to have been planktonic.[9]
^ аб Траверс, А. (2007). «Что такое палеопалинология и чем не является». Палеопалинология . Темы геобиологии. Том. 28. стр. 1–43. дои : 10.1007/978-1-4020-5610-9_1. ISBN 978-1-4020-6684-9.
^ Вуд, Г.Д., Миллер, М.А. и Бергстром, С.М. 2004. Органические остатки тентакулита позднего девона (франа) в палинологических препаратах, регион Радом-Люблин, Польша. Мемуары Ассоциации австралийских палеонтологов 29: 253–258.
^ аб Филипиак, П.; Ярзинка, А. (2009). «Органические остатки тентакулитид: новые данные из верхнего девона Польши». Acta Palaeontologica Polonica . 54 : 111–116. дои : 10.4202/app.2009.0111 .
^ Агер, 1963, Принципы палеонтологии.
^ Винн, О. (2010). «Адаптивные стратегии в эволюции инкрустирующих тентакулитоидных трубчатых червей». Палеогеография, Палеоклиматология, Палеоэкология . 292 (1–2): 211–221. Бибкод : 2010PPP...292..211В. дои :10.1016/j.palaeo.2010.03.046 . Проверено 11 января 2014 г.
