Life reconstruction of Phantaspis auritus  at different ontogenetic stages。（圖片來源： Zhixin Sun ，採用   CC BY-SA 4.0  授權。） Age Cambrian（Wuliuan） 509-504 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Ptychopariida Genus: Phantaspis Species: Phantaspis auritus Morphological description In the mudstone layers of the Honghe Member from the middle Cambrian of Shandong, a distinctive trilobite was discovered, named Phantaspis auritus . In adult individuals, th

Reconstruction of Ogygopsis klotzi （圖片來源：PaleoEquii，採用  CC BY-SA 4.0  授權） Age Cambrian（Wuliuan） 505 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Corynexochida Family: Dorypygidae Genus: Ogygopsis Species: Ogygopsis klotzi Morphological description Ogygopsis klotzi  can reach a body length of up to 13 cm. Its overall outline is oval in shape, with a crescent-shaped cephalon. The thorax consists of eight segments. The pygidium is exceptionally large,

Fossil specimen of Heliopeltis johnsoni （圖片來源：Bob's Fossils，採用  CC BY 4.0  授權） Age Devonian（Eifelian） 388 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Corynexochida Family: Scutelluidae Genus: Heliopeltis Species: Heliopeltis johnsoni Morphological description Heliopeltis johnsoni  has a body length of approximately 5.5 cm. The glabella is prominently raised. Each eye lobe bears two spines of unequal size, one large and one small. The genal spines

Reconstruction of Redlichia rex 圖源：Katrina Kenny Age Cambrian（"Stage 4"） 514 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Redlichiidae Genus: Redlichia Species: Redlichia rex Morphological description Redlichia rex  is a very large trilobite, reaching a maximum body length of approximately 30 cm. It possesses prominent genal spines, a thorax composed of 15 segments, and a relatively small pygidium. Fossil specimen of Redlichia

Fossil specimen of Redlichia chinensis （圖片來源：Dwergenpaartje，採用  CC BY-SA 3.0  授權） Age Cambrian（"Stage 4"） 514 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Redlichiidae Genus: Redlichia Species: Redlichia chinensis Morphological description Redlichia chinensis  is a relatively large trilobite, reaching up to 7.5 cm in length. The cephalon is broad, with long genal spines. The thorax consists of 15 segments, with the eleventh segm

Fossil specimen of Emuella dalgarnoi Paterson, J., Edgecombe, G. E. (2006) Age Cambrian（"Stage 3"） 521 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Emuellidae Genus: Emuella Species: Emuella dalgarnoi Morphological description Emuella dalgarnoi  has a cephalon that is roughly pentagonal in outline, with a semicircular cranidium and well-developed genal spines. The prothorax consists of six segments, with the sixth segment bearin

Fossil specimen of Emuella polymera （ 圖片來源： Dave Simpson ，採用  CC BY 4.0  授權 ） Age Cambrian（"Stage 3"） 521 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Emuellidae Genus: Emuella Species: Emuella polymera Morphological description Emuella polymera  has a cephalon that is roughly pentagonal in outline, with a semicircular cranidium and well-developed genal spines. The prothorax consists of six segments, with the sixth segment beari

Fossil specimen of Balcoracania dailyi （ 圖片來源： Dave Simpson ，採用  CC BY 4.0  授權 ） Age Cambrian（"Stage 3"） 521 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Emuellidae Genus: Balcoracania Species: Balcoracania dailyi Morphological description Balcoracania dailyi  has a semicircular cephalon with relatively well-developed genal spines. The prothorax consists of six segments, with the sixth segment bearing a distinct pleural spine. T

Fossil specimen of Yunnanocephalus yunnanensis （圖片來源：Dwergenpaartje，採用  CC BY-SA 3.0  授權） Age Cambrian（"Stage 3"） 521 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Yunnanocephalidae Genus: Yunnanocephalus Species: Yunnanocephalus yunnanensis Morphological description Yunnanocephalus yunnanensis  is a small trilobite, reaching approximately 2 cm in length. The body is anteriorly broad and gradually tapers posteriorly, giving it an

Fossil specimen of Estaingia bilobata （圖片來源：PAR，採用  CC BY 4.0  授權） Age Cambrian（"Stage 4"） 514 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Estaingiidae Genus: Estaingia Species: Estaingia bilobata Morphological description Estaingia bilobata  is a small trilobite, reaching about 2 cm in length. The genal spines are of moderate length. The thorax consists of 13 segments, with relatively short pleural spines. The pygidium is smal

Fossil specimen of Peachella brevispina 圖源：Mark Webster Age Cambrian（"Stage 4"） 514 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Olenellidae Genus: Peachella Species: Peachella brevispina Morphological description Peachella brevispina  is a medium-sized trilobite, reaching approximately 3.5 cm in length. The cephalon is semicircular, with a columnar glabella. The genal spines are broad but relatively short. The third thoracic s

Reconstruction of Peachella iddingsi （圖片來源：Apokryltaros，採用  CC BY-SA 3.0  授權） Age Cambrian（"Stage 4"） 514 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Olenellidae Genus: Peachella Species: Peachella iddingsi Morphological description Peachella iddingsi  is a medium-sized trilobite, reaching approximately 3.5 cm in length. The cephalon is semicircular in shape, and the glabella is columnar. The genal spines are broad and inflated

Reconstruction of Olenelloides armatus （圖片來源：Nobu Tamura，採用  CC BY-SA 4.0  授權） Age Cambrian（"Stage 4"） 514 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Redlichiida Family: Olenellidae Genus: Olenelloides Species: Olenelloides armatus Morphological description Olenelloides armatus  is a small trilobite, reaching a maximum body length of about 1 cm. Its exoskeleton is narrow and elongated. The cephalon is hexagonal in outline, with a spine projecting

Waukeshaaspis eatonae fossil（圖片來源：Kennethgass，採用  CC BY-SA 4.0  授權） Age Silurian（Telychian） 435 Ma Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Phacopida Family: Dalmanitidae Genus: Waukeshaaspis Species: Waukeshaaspis eatonae Morphological description Waukeshaaspis eatonae is a medium-sized trilobite with noticeable variation among individuals. The average body length is approximately 6 cm. The cephalon is semicircular in shape, and the genal spine