Sea spiders are marine arthropods of the order Pantopoda (lit. ‘all feet’), belonging to the class Pycnogonida, hence they are also called pycnogonids / p ɪ k ˈ n ɒ ɡ ə n ə d z / (named after Pycnogonum, the type genus; with the suffix -id). Most are toward the smaller end of this range in relatively shallow depths; however, they can grow to be quite large in Antarctic and deep waters.

Arthropod exoskeletons are made of cuticle, a non-cellular material secreted by the epidermis. Their cuticles vary in the details of their structure, but generally consist of three main layers: the epicuticle, a thin outer waxy coat that moisture-proofs the other layers and gives them some protection; the exocuticle, which consists of chitin and chemically hardened proteins; and the ...

Die Trilobiten (Trilobita, „Dreilapper“, von altgriechisch τρία tria „drei“ und λοβός lobós „Lappen“) sind eine ausgestorbene Klasse meeresbewohnender Gliederfüßer (Arthropoda).. Die Trilobiten existierten nahezu während der gesamten Spanne des Paläozoikums (Erdaltertum), von der 2. Serie des Kambriums (Beginn vor 521 Mio. Jahren) bis zum Massenaussterben am Ende des ...

節肢動物是動物的一大類群，由六足亞門（昆蟲等）、甲殼亞門（蝦、螃蟹等）、螯肢亞門（蜘蛛、蠍子等）、多足亞門（蜈蚣、馬陸等）等外骨骼動物組成被稱為節肢動物門（學名： Arthropoda ）的分類單位。 為動物界中所屬物種最多的一門。 已被人類命名的昆蟲類就有超過75萬種 。

三葉虫（さんようちゅう、トライロバイト、英語: trilobite 、学名: Trilobita ）は、古生代にかけて生息した化石 節足動物の分類群である。 分類学上は三葉虫綱とされ、横で3部に分かれた硬い外骨格を背面にもつ。 古生代を代表する海生動物であり、冒頭のカンブリア紀から繫栄し、終焉 …

The Eurypterid (you-rip-teh-rid), sometimes referred to as Sea Scorpion, is one of the creatures in ARK: Survival Evolved. This section is intended to be an exact copy of what the survivor Helena Walker, the author of the dossiers, has written. There may be some discrepancies between this text and the in-game creature. The Eurypterid moves silently along the floor of the ocean, …