Asayansi amakono amaganiza za crustaceans, arthropods wakale kwambiri, chelicerales, zolengedwa zapadera komanso zodabwitsa. Kuchokera pakuwona mbadwa, abale awo oyandikana kwambiri ndi nyama zamakono ndi nkhono zamtchire, malo awo omwe ndi malo osaya kwambiri a Atlantic, Indian ndi Pacific Oceans, ndi zinkhanira zakumtunda ndi akangaude.
M'mawonekedwe, zinkhanira zinali ngati zinkhanira zazikulu. Kutalika kwa matupi awo nthawi zambiri kukafika mita zingapo. Monga zinkhanira, crustaceans anali ndi zida zoopsa - mbola yapoizoni yomwe ili kumapeto kwa mchira. Kutsogolo kwa zilombo zoopsa zomwe zinali ndi zikhadabo zolimba kapena zoluka zazitali zomwe zimathandiza nyama kugwira ndikugwira wogwidwa. Miyendo yam'mbuyoyo idasinthidwa kukhala mafunde.
Giant crustaceans - mizukwa yayikulu yomwe imakhala m'madzi am'nyanja ndi m'nyanja za nthawi ya Devonia - inakhala malo apadera pakati pa ma invertebrates. Nthawi ina inali imodzi mwa magulu ambiri a nyama zakale zomwe zimafa pazifukwa zosadziwika.
Tsiku la kuchuluka kwa crustaceans, malinga ndi asayansi, likugwera pa Silurian ndi Devonia. Malo awo anali ochulukirapo, okhala ndi ziphalaphala zambiri zopezeka mdziko lapansi panthawiyi. Pafupi ndi nyama zodya nyama, mitundu yosiyanasiyana ya nsomba imakhala, komanso ma trilobites, omwe amapanga chakudya cha crustaceans.
[Sinthani] Chisinthiko
Racoscorpions adakhalapo nthawi yonse ya Paleozoic - zaka 510-248 miliyoni zapitazo. Mitundu yoyambirira imakhala m'madzi osaya munyanja. Pafupifupi zaka 325-299 miliyoni zapitazo, ambiri a crustaceans adakhala moyo ndi madzi abwino.
Tizilombo tambiri titha kuterera.
Pamenepa, ma crustaceans ndiosangalatsa monga chitsanzo cha kusintha kuchokera kunyanja kupita kunyanja.
[Sinthani] Physiology
Ma Racoscorpions anali akulu kuchokera 20 cm mpaka 2,5 mpaka 3 m.The arthropods odziwika kwambiri ndi a crustaceans - Jaekelopterus rhenaniae, yemwe adakhala zaka pafupifupi 460-255 miliyoni zapitazo, ndipo anali ndi kutalika kwa mita 2.5.
Anali ndi miyendo yambiri yamiyendo yambiri yomwe imawalola kuti azisambira kapena kukwawa pansi.
Gulu
Lamuloli limaphatikizapo banja la Pterygotidae, yemwe adakhala zaka pafupifupi 470 mpaka 300 miliyoni zapitazo. Iwo anali mamembala a superfamily Pterygotioidea. Gululi linaphatikizapo anthu omwe amatengedwa ngati arthropods zazikulu kwambiri m'mbiri ya dziko lapansi. Kutalika kwa zolengedwa zotereku kunafika mamita awiri ndi theka. Mulinso mitundu ingapo yobadwa: Acutiramus - yemwe amakhala kuchokera ku Late Silurian kupita ku Dyone Loyambirira. Kafukufuku wopangidwa mu 2011 adawonetsa kuti nyamayi ndiyothekera kwambiri kapena phytophage.
Ma arthropod odziwika kwambiri ndi a crustaceans - Jaekelopterus rhenaniae, yemwe amakhala zaka pafupifupi 460-255 miliyoni zapitazo ndipo anali ndi kutalika kwamamita 2.5.