The Tarphycerida were the first of the coiled cephalopods, found in marine sediments from the Lower Ordovician (middle and upper Canad) to the Middle Devonian. Some, such as Aphetoceras and Estonioceras, are loosely coiled and gyroconic; others, such as Campbelloceras, Tarphyceras, and … See more The Tarphycerida comprise three phylogenetically related groups of families. They are: the tarphyceratid group consisting of the Estonioceratidae, Tarphyceratidae, Trocholitidae, and Ophidioceratidae; … See more Tarphycerids are more closely related to the diverse Oncocerida, through the ancestral Bassleroceratidae in the Lower Ordovician, than to the other nautiloid orders. The Oncocerida, in turn, gave rise to the Nautilida which include the recent Nautilus See more The tarphycerid animal must have been rather elongated, like squid, although no close relationship is implied. Either that or it was able to retreat deep into its portable lair. As for whatever … See more • Flower R.H. 1988; Progress and Changing Concepts in Cephalopod and Particularly Nautiloid Phylogeny and Distribution, in Cephalopods – … See more WebHlavonožce (zastarano: hlavonohé, hlavonožci, ramenýše; lat. Cephalopoda) sú trieda schránkovcov. Sú to bilaterálne súmerné morské mäkkýše s priamym vývinom a sú to tiež vedúce skameneliny druhohôr. Považujú sa za klasický príklad …

tarphycerida - Synonyms of tarphycerida Antonyms of …

Web두족류 (頭足類)는 두족강 (頭足綱)에 속하는 연체동물 의 총칭으로, 좌우대칭형이며 몸통이 머리의 위에 붙어있고 머리의 밑에 바로 다리가 존재하는 것을 공통적인 특징으로 하는 동물들을 부류한 것이다. 현재 약 1000종에서 1200종 사이가 현존하는 것으로 ... WebApr 11, 2024 · The type specimens of Eothinoceras americanum Ulrich et al., 1944, type species of the genus Eothinoceras Ulrich et al., 1944, are revised based on new photographic material. The resulting interpretation of the conch shape of Eothinoceras shows that the type species is an endogastric cyrtocone, necessitating the restriction of Eothinoceras to … low tide newquay

2.2 “Nautiloidea” - Digital Atlas of Ancient Life

Webพบว่าเป็นซากดึกดำ บรรพ์นอติลอยด์ (Nautiloid) ที่อยู่ในหินปูนยุคออร์โดวิเชียน อายุประมาณ 470 ล้านปีก่อน. ซึ่งนอติลอยด์ถือเป็นสัตว์ ... Web6 relations: Aethoceras, Aphetoceras, Arenig, Campbelloceras, List of prehistoric nautiloid genera, Tarphycerida. Aethoceras. Aethoceras is a genus of Tarphycerida nautiloids included in the family Estonioceratidae for which the shell is a loosely coiled, gradually expanding dextral torticone with a slightly derpressed whorl section. WebTarphycerids were diverse and abundant in Ordovician marine faunas. Beginning at the Late Ordovician extinction, the diversity of tarphycerids declined throughout the Silurian, until … jay sean archieve.org