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Khmeriamorpha Temporal range: Late Permian–Late Triassic PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Tunicata
Class:	Ascidiacea
Order:	†Khmeriamorpha Wendt, 2018
Genera and species
Khmeria K. minima K. problematica K. stolonifera Zardinisoma Z. cassianum Z. japonicum Z. pauciplacophorum Z. polyplacophorum Z. pyriforme

Khmeriamorpha is an order of extinct ascidians, characterized by a composite calcareous exoskeleton. It is known from the Late Permian to Late Triassic, and comprises the genera Khmeria and Zardinisoma.^[1]

References

Kowalevskia
Fritillariidae	Appendicularia Fritillaria Tectillaria
Oikopleuridae	Althoffia Bathochordaeus Chunopleura Folia Megalocercus Mesochordaeus Mesoikopleura Oikopleura Pelagopleura Sinisteroffia Stegosoma

Molgulidae	Anomopera Asajirus Bostrichobranchus Eugyra Fungulus Gamaster Minipera Molgula Molguloides Namiella Oligotrema Paramolgula Pareugyrioides Protomolgula Rhizomolgula
Pyuridae	Bathypera Bathypyura Boltenia Bolteniopsis Claudenus Cratostigma Ctenyura Culeolus Halocynthia Hartmeyeria Hemistyela Herdmania Heterostigma Microcosmus Paraculeolus Pyura
Styelidae	Alloeocarpa Amphicarpa Arnbackia Asterocarpa Bathyoncus Bathystyeloides Berillia Botryllocarpa Botrylloides Botryllus Chorizocarpa Cnemidocarpa Dendrodoa Dextrocarpa Dicarpa Distomus Eusynstyela Gynandrocarpa Kukenthalia Metandrocarpa Monandrocarpa Oculinaria Oligocarpa Pelonaia Podostyela Polyandrocarpa Polycarpa Polyzoa Protostyela Psammostyela Seriocarpa Stolonica Styela Symplegma Syncarpa Theodorella Tibitin

Doliopsoides Paradoliopsis Pseudusa
Doliopsidae	Doliolula Doliopsis
Doliolidae	Dolioletta Doliolina Dolioloides Doliolum

Euherdmania Placentela Stomozoa Vitrum
Clavelinidae	Clavelina Euclavella Nephtheis Pycnoclavella
Diazonidae	Diazona Pseudodiazona Pseudorhopalaea Rhopalaea Tylobranchion
Didemnidae	Atriolum Clitella Coelocormus Didemnum Diplosoma Leptoclinides Lissoclinum Polysyncraton Trididemnum
Holozoidae	Distaplia Hypodistoma Hypsistozoa Neodistoma Polydistoma Protoholozoa Pseudoplacentela Scotiazoa Sigillina Sycozoa
Polycitoridae	Archidistoma Brevicollus Cystodytes Eucoelium Eudistoma "Exostoma" Millarus Polycitor Polycitorella Rhombifera Salix
Polyclinidae	Aplidiopsis Aplidium Morchellioides Morchellium Neodictyon Polyclinella Polyclinum Sidneioides Synoicum
Protopolyclinidae	Condominium Monniotus Protopolyclinum
Pseudodistomidae	Anadistoma Citorclinum Pseudodistoma
Ritterellidae	Dumus Pharyngodictyon Ritterella

Dimeatus Hypobythius
Agneziidae	Adagnesia Agnezia Caenagnesia Proagnesia Pterygascidia
Ascidiidae	Ascidia Ascidiella Fimbrora Phallusia Psammascidia
Cionidae	Araneum Ciona Tantillulum
Corellidae	Abyssascidia Chelyosoma Clatripes Corella Corelloides Corellopsis Corynascidia Dextrogaster Mysterascidia Rhodosoma Xenobranchion
Octacnemidae	Benthascidia Cibacapsa Cryptia Dicopia Kaikoja Megalodicopia Myopegma Octacnemus Polyoctacnemus Situla
Perophoridae	Ecteinascidia Perophora
Plurellidae	Microgastra Plurella