Haikouella is an agnathan chordate from the Lower Cambrian Maotianshan Shales of Chengjiang County in Yunnan Province, China. An analysis in 2015 placed Haikouella as a junior synonym of Yunnanozoon, another Maotianshan shale Cambrian chordate. There are two known species, H. lanceolata and the type species, and H. jianshanensis.
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| - Haikouella (cs)
- Haikouella (en)
- Haikouella lanceolata (it)
- Haikouella (fr)
- Haikouella (pl)
- Хайкоуэлла (ru)
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| - Haikouella je vyhynulý primitivní strunatec ze spodního kambria (před 530 miliony lety). Byl nalezen v Chaj-kchou u Kchun-mingu v Číně. Zřejmě měl již srdce, dorzální a ventrální aortu, neurální trubici a mozek, ale veškeré interpretace měkkých orgánů u takto starých fosilií jsou velice komplikované. Nicméně uvedené znaky by ho řadily mezi obratlovce. Haikouella byla nalezena již nejméně v 300 jedincích (stav k r. 2002). (cs)
- Haikouella est un genre éteint de chordés primitifs marins probablement du Cambrien inférieur, retrouvé dans les schistes de Maotianshan au Yunnan, en Chine. (fr)
- Haikouella – żyjący w kambrze strunowiec morski, którego szczątki znane są z dolnokambryjskiej formacji Qiongzhusi w powiecie (prowincja Junnan, Chiny). Wykazuje wyraźne podobieństwa do Yunnanozoon lividum. Posiadała jednak również szereg innych cech, jak np. serce, prawdopodobnie brzuszną i grzbietową aortę, tętnice skrzelowe, szpary skrzelowe, wyraźnie zaznaczony ogon, relatywnie duży mózg, pień nerwowy oraz głowę z prawdopodobnie bocznie rozmieszczonymi oczami. Haikouella ze względu na swoją budowę i czas występowania była blisko spokrewniona z przodkiem wszystkich kręgowców. (pl)
- Хайкоуэлла (лат. Haikouella) — род вымерших животных, с высокой долей вероятности относящихся к хордовым (Chordata). Описан по ископаемым остаткам из Маотяньшаньских сланцев провинции Юньнань (Китай). (ru)
- Haikouella is an agnathan chordate from the Lower Cambrian Maotianshan Shales of Chengjiang County in Yunnan Province, China. An analysis in 2015 placed Haikouella as a junior synonym of Yunnanozoon, another Maotianshan shale Cambrian chordate. There are two known species, H. lanceolata and the type species, and H. jianshanensis. (en)
- Haikouella lanceolata è l'unica specie conosciuta del genere Haikouella, nota da 305 campioni fossili reperiti per la maggior parte nella zona di Maotianshan nella provincia dello Yunnan della Cina. L'età stimata di questa specie è di circa 530 milioni di anni, nel Cambriano inferiore. (it)
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| - Artist's restoration of Haikouella lanceolata. (en)
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| - Haikouella lanceolata (en)
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| - Chen, Huang & Li, 1999 (en)
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| - Haikouella je vyhynulý primitivní strunatec ze spodního kambria (před 530 miliony lety). Byl nalezen v Chaj-kchou u Kchun-mingu v Číně. Zřejmě měl již srdce, dorzální a ventrální aortu, neurální trubici a mozek, ale veškeré interpretace měkkých orgánů u takto starých fosilií jsou velice komplikované. Nicméně uvedené znaky by ho řadily mezi obratlovce. Haikouella byla nalezena již nejméně v 300 jedincích (stav k r. 2002). (cs)
- Haikouella is an agnathan chordate from the Lower Cambrian Maotianshan Shales of Chengjiang County in Yunnan Province, China. An analysis in 2015 placed Haikouella as a junior synonym of Yunnanozoon, another Maotianshan shale Cambrian chordate. It is similar to the form Yunnanozoon, which is possibly a hemichordate. Still, there are anatomical differences from Yunnanozoon, including a larger stomach and smaller (0.1 mm) pharyngeal teeth. Haikouella does not have bones or a movable jaw, but it otherwise resembles vertebrates. Haikouichthys and Myllokunmingia, which seem to share significant fish-like characters, have been found in the same beds. Suspected hemichordates are also known from these deposits as well as from the Middle Cambrian Burgess Shale of British Columbia. Other than possible fish scales/plates from the Upper Cambrian of Wyoming, these Chinese fish-like chordates are one of the only known pre-Ordovician craniates. Haikouella is known from 305 specimens mostly from a single bed in the Maotianshan Shales. The animal is 20 to 30 mm (40 mm max) in length and has a head, gills, brain, notochord, well developed musculature, heart and circulatory system. It has a bent caudal projection of the notochord that might be a primitive tail fin. It might have a pair of lateral eyes. Very small (0.1 mm) structures that are probably pharyngeal teeth are present in the body cavity. A few specimens display dorsal and ventral fins. There are two known species, H. lanceolata and the type species, and H. jianshanensis. (en)
- Haikouella est un genre éteint de chordés primitifs marins probablement du Cambrien inférieur, retrouvé dans les schistes de Maotianshan au Yunnan, en Chine. (fr)
- Haikouella lanceolata è l'unica specie conosciuta del genere Haikouella, nota da 305 campioni fossili reperiti per la maggior parte nella zona di Maotianshan nella provincia dello Yunnan della Cina. L'età stimata di questa specie è di circa 530 milioni di anni, nel Cambriano inferiore. La H. lanceolata si presenta di forma pesciforme, simile agli altri fossili rinvenuti nella zona; è simile alla forma Yunnanozoon, più primitiva, ed è probabilmente un emicordato. Vi sono però alcune differenze anatomiche dallo Yunnanozoon. Non ha ossa né una mandibola mobile, ma a parte questo ricorda i vertebrati. È lungo da 20 a 30 millimetri (massimo 40) ed è dotato di una testa, branchie, cervello, notocorda, una muscolatura ben sviluppata, cuore e sistema circolatorio. Ha una proiezione caudale della notocorda che può essere una primitiva pinna caudale, e sembra presentare una coppia di occhi laterali. Alcuni esemplari mostrano la pinna dorsale e ventrali. (it)
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