Brachiopod - Wikipedia
Brachiopods (/ ˈbrækioʊˌpɒd /), phylum Brachiopoda, are a phylum of animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection.
腕足动物门 - 百度百科
2023年，国际科研团队在英国威尔士中奥陶世地层中发现的“布尔吉斯页岩型”特异埋藏化石库--城堡滩生物群，发现有 170 多种生物，其中包括腕足动物等多个动物门类。 [3] 腕足动物 是最古老的 动物类群 之一，最早出现于 5亿年以前 古生代 的 寒武纪 、 志留纪 和 泥盆纪 达到高峰，以后便衰落下来。 腕足动物门分为两个纲：① 无铰纲，壳内后部无铰合装置， 壳质 为 磷酸盐 和几丁质，无腕骨， 消化管 终于 肛门 向外开口，幼虫期长，消化管、 触手冠 和成体肌肉（至少大部 …
腕足动物门 - 维基百科，自由的百科全书
腕足动物门 （學名： Brachiopoda）是 动物界 的一个 门，屬於 底栖 、有一對硬壳的 海生 觸手冠動物。 但與 雙殼類 軟體動物 不同的是：其殼是上、下開合，而不是左、右開合。 鉸 位在後背部，而前方可開合作捕食或防御。 牠們自 寒武紀 開始演化，在 古生代 時期最為繁盛，物種多樣性達到最高峰，大约发现了超过12000个化石种，但之後於古生代末期的 二疊紀－三疊紀滅絕事件 事件中大幅衰落， 生態棲位 被雙殼類動物所取代。 现存的腕足动物只有300种左右，且多分布在 …
ADW: Brachiopoda: INFORMATION
The phylum Brachiopoda, also known as lamp shells, is a group of bilaterally symmetrical, coelomate organisms that superficially resemble bivalve molluscs. Approximately 450 species of living brachiopods are currently known, and have traditionally been divided into two classes: Inarticulata (orders Lingulida and Acrotretida ) and Articulata ...
Brachiopods - British Geological Survey
Brachiopods are marine animals belonging to their own phylum of the animal kingdom, Brachiopoda. Although relatively rare, modern brachiopods occupy a variety of seabed habitats ranging from the tropics to the cold waters of the Arctic and, especially, the Antarctic.
Fossil Brachiopods - U.S. National Park Service
2024年10月25日 · Brachiopoda were a dominant group of marine organisms during the Paleozoic. Their name comes from the Greek words brachion, meaning “arm,” and podos, meaning “foot.” This references to their internal anatomy. Brachiopods were once thought to be mollusks, which have a muscular internal foot.
Brachiopoda - Digital Atlas of Ancient Life
2019年10月25日 · Brachiopods are marine invertebrates, meaning they have no backbone, and are one of the few animal groups that live only in the ocean. They live on the ocean bottom in a variety of places, including soft sediments, on rocks, reefs, or in rock crevices where some even anchor themselves with a muscular stalk called a pedicle.
Brachiopoda - New World Encyclopedia
Brachiopoda (from Latin bracchium, arm + New Latin -poda, foot) is a major invertebrate phylum, whose members, the brachiopods or lamp shells, are sessile, two-shelled, marine animals with an external morphology resembling bivalves (that is, "clams") of phylum Mollusca to which they are not closely related. Brachiopods are found either attached ...
Brachiopoda Classification - Digital Atlas of Ancient Life
With very few living representatives, brachiopod classification has primarily come from a paleontological perspective, with substantial consideration given to the morphology of the shell. Traditionally, brachiopods have been separated into two major groups: the Inarticulates (brachiopods with phosphatic shells) and Articulates (everything else).
Brachiopoda - Encyclopedia.com
2018年5月8日 · Brachiopoda (brākēŏp´ədə), phylum of shelled sessile or sedentary marine animals, commonly known as lamp shells, and characterized by a peculiar feeding organ, the lophophore.