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Neogastropoda

Hansen, Thomas

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Neogastropoda

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Neogastropoda is an order of aquatic snails, both freshwater and marine gastropod molluscs. Neogastropods and their close relatives, such as Tonnoidea and Cypraeoidea, form the clade Latrogastropoda.

Species

neogastropods: whelks & cone shells

ORDER

  1. KingdomAnimalia
  2. PhylumMollusca
  3. ClassGastropoda
  4. OrderNeogastropoda
Habitatmarine, brackish, freshwater
Observations recorded2,958,650

新腹足類(學名:Neogastropoda)是軟體動物門腹足纲的演化分支。在2005年《布歇特和洛克羅伊的腹足類分類》之前的舊分類,本分支被稱為新腹足目[2]或新腹足次目。在2017年的更新分類中,這個支序又再成為目級的分類單元[3]。 目录 1 簡述 2 分類 2.1 1997年分類 2.2 2005年分類 2.3 2017年分類 2.4 科 3 參考文獻 4 外部連結 簡述 新腹足類的化石紀錄相對來說比較整全,而且支持目前普遍接受的演化論場景,即:本分類物種起源自早白垩世,隨後經歷過兩輪分別發生於晚白堊世及古新世的急速分化[4]。 本支序物種只有一個心室、一個腎臟及一個單絲鰓,即鰓絲僅在中心軸的一側發育[5]。 螺殼都留有通道讓虹管通過。這些象拔似的超長虹管是一條可延伸的管,從螺的外套膜的褶形成。這些物種的虹管可讓螺隻吸水進外套膜腔內。而在虹管的底部有從中心軸發育的雙絲嗅檢器(英语:osphradium),比物種的對應部分更發達。They achieved important morphological changes including e.g., the elongation of the siphonal canal, a shift in the mouth opening to a terminal position on the head, and the formation of a well-developed proboscis.[4] The nervous system is very concentrated. Many species have the ganglia in a compact space. 齒舌作梁舌型,像一把銼(英语:rasp)那樣運作,每排只有三枚舌齒[5]。 新腹足類的物種均為雌雄異體(dioecious)。 本分類現時有約1.6萬個物種,其成員不乏有名的物種,例如:有毒的芋螺科物種、conchs, mud snails, olive snails, oyster drills, tulip shells, and whelks. 本分類物種除了Clea跟Rivomarginella這兩個屬為淡水螺之外,其餘物種均為海螺。本分類是熱帶海洋裡物種多樣性最豐富的一員[4]。牠們主要為獵食者,但也有食腐动物物種。 分類 新腹足類,舊作狭舌目(Stenoglossa,stena意思为狭窄),具體定義為其物種的齒舌每行具有1-3个齿。之後成為了新腹足目,它被约翰尼斯·提艾利(1921)放置於前鳃亚纲(Prosobranchia Milne-Edwards, 1848)之內[6][7]。打從這時開始,新腹足類物種都被認為是一個自然群組[7],與其他的新進腹足類動物格外分明[4]。所以這個分類獲普遍同意為一個單系群,因

via GBIF

Museum specimens

Specimen records
1,067
With media
47
Collections
LACM, NHMUK, SDNHM, PRI
Recorded in
United States, United Kingdom

Wikidata facts

Instance of
taxon
Parent taxon
Caenogastropoda
Image
Chicoreus palmarosae.jpg
Show 5 more facts
taxon name
Neogastropoda
Commons category
Neogastropoda
topic's main category
Category:Neogastropoda
taxon rank
order
taxon common name
néogastéropode
Sources (1)

via Wikidata · CC0

~6 min read

Encyclopedic overview

5 sections
Contents
  • Description
  • Taxonomy
  • Families
  • References
  • External links

Neogastropoda is an order of aquatic snails, both freshwater and marine gastropod molluscs. Neogastropods and their close relatives, such as Tonnoidea and Cypraeoidea, form the clade Latrogastropoda.

== Description == thumb|alt=Snails on excavated sandy substrate with decorative rocks in a small aquarium|Two neogastropods, Brunneifusus ternatanus (left) and [[Murex trapa (right) in captivity.]] The available fossil record of Neogastropoda is relatively complete, and supports a widely accepted evolutionary scenario of an Early Cretaceous origin of the group followed by two rapid diversification rounds in the late Cretaceous and the Paleocene.

Excerpted from Wikipedia’s “Neogastropoda” article, available under the CC BY-SA 4.0 licence.

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