Protoconch meaning
Webbprotoconch(pl.esorprotoconchs) (zoology) The embryonicshell, or first chamber, of ammonitesand other cephalopods. Dictionary entries Entries where "protoconch" occurs: protoconches: protoconches (English) Noun protoconches Plural of protoconch Webb9 juli 2024 · For almost 150 years of scientific research on the family, shell characters have proved to be rather effective species-level means of identification, especially when the protoconch is intact. Furthermore, reliance on shell characters is particularly justified by the fact that many species have never been encountered alive—a fact that especially holds …
Protoconch meaning
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WebbA protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod.In older text it is also called "nucleus". The protoconch may sometimes consist of several whorls, but when this is the case, the whorls show no … Webb6 nov. 2024 · The embryonic shell, or protoconch, bears a distinct sculptural design from the rest of the shell. This is the section of the snail’s shell that it possesses when it is born. ... Snails are hermaphroditic, which means they use sexual reproduction to help maintain genetic variation.
WebbAbstract. Major papers on pyramidellid protoconchs, larval development, and larval ecology are reviewed, partly with illustrations. Larval shell coiling (including hyperstrophy and heterostrophy) is discussed. A-, B-, and C-type protoconchs are figured and distinguished. Those of species in the Baltic and northwestern France have been used to ... WebbThe embryonic apparatus is composed of a protoconch and a slightly smaller deuteroconch, surrounded by a common wall with canals. • Protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod.
WebbMeanings of the word Protokonch - پروٹوکونچ in English is protoconch. To understand how would you translate the word Protokonch - پروٹوکونچ in English, you can take help from words closely related to Protokonch - پروٹوکونچ or it’s English translations. http://dictionary.education/english/dictionary/protoconch
WebbThe operculum, meaning little lid, (plural: opercula or operculums) is a corneous or calcareous structure which exists in some groups of marine, freshwater, and land snails or gastropods. It is present in most but not all gastropods that have shells and gills.
Webb2 apr. 2014 · The openly coiled protoconch is anachronistic in this Triassic gastropod. Type species. Anachronistella peterwagneri sp. nov. Diagnosis. Protoconch widely openly coiled with faint axial larval ornament and an abrupt transition to the teleoconch; teleoconch high-spired with indistinct wavy axial ribs. Anachronistella peterwagneri sp. … 塩 ラーメン 残り汁 チャーハンWebbThe definition of protoconch in Dictionary is as: The embryonic shell, or first chamber, of ammonites and other cephalopods. Meaning of protoconch for the defined word. … 塩ラーメン 早稲田 高田馬場Webb貝類/主要用語解説かいるいしゅようようごかいせつ. 【 】の無いものは、 巻き貝 、二枚貝、掘足類、頭足類の各類に共通。. ＊印は別に本項目があることを示す。. 足 (あし) foot. イカ・タコ類を除いて動物体の腹側にあり、柔軟性に富む筋肉からなる。. 砂 ... 塩ラーメン もやし 作り方WebbNoun. teleoconch ( pl. teleoconchs or +) ( zoology) The portion of a shell of a conchiferan mollusc formed immediately after the larval stage of the life cycle of the organism. 1995, … 塩 レンジWebbFör 1 dag sedan · Lexikon der Biologie Protoconch. Protoc o nch m [von *proto- , griech. kogchē = Muschel], Protoconcha, Anfangskammer, das Larvalgehäuse von Weichtieren. … 塩レモン 大量消費WebbProtoconch — A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell of some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. The protoconch may sometimes consist of … bondmax ライカWebbnoun. pro· to· conch. ˈprōtə+ˌ-. 1. : the embryonic shell of a mollusk (as a univalve) 2. : the apical chamber or whorl of an ammonite or gastropod. bond oita オンライン企業説明会