Ptychopariidae Explained

Ptychopariidae is a family of trilobites, containing the following genera:^[1]

• Achlysopsis
• Altikolia
• Altitudella
• Amecephalites
• Asthenopsis
• Austinvillia
• Balangcunaspis
• Bashania
• Bathyholcus
• Bathyocos
• Billingsaspis
• Binodaspis
• Blairella – see Neoblairella ^[2]
• Bolaspidina
• Brunswickia
• Bulkuraspis
• Caborcella
• Callidaspina
• Callidaspis
• Cathayanella
• Champlainia
• Chengshanaspis
• Chinghisicus
• Chunghwaella
• Conopolus
• Dananzhuangia
• Deltina
• Douposiella
• Elrathina
• Entsyna
• Eodouposiella
• Eokochaspis
• Eosoptychoparia
• Eospencia
• Eurostina
• Finecrestia
• Gaotanaspis
• Gaphuraspis
• Gedongaspis
• Gunnia
• Hadrocephalites
• Hadrokraspedon
• Hamptonella
• Hejinaspis
• Hemicricometopus
• Hewenia
• Holasaphus
• Horbusonia
• Illtydaspis
• Jangudaspis
• Jialaopsis
• Jianchangia
• Jimaoshania
• Jiumenia
• Kermanella
• Kochaspis
• Kochiella
• Kochiellina
• Kochina
• Kounamkites
• Kunmingaspis
• Laminurus
• Laoyingshania
• Lianglangshania
• Loriella
• Luguoia
• Luxella
• Lyriaspis
• Majiangia
• Manailina
• Meitania
• Metisella – see Rasettiella ^[3]
• Mexicella
• Monanocephalus
• Mopanshania
• Mrassina
• Mufushania
• Nangaocephalus
• Nangaoia
• Nangaops
• Nanoqia
• Nassovia
• Nelsonia – see Paleonelsonia 
• Neoblairella ^[2]
• Neoregina ^[2]
• Neokochina
• Nyella – Palmerara ^[4]
• Olenekina
• Onchocephalites
• Ontoella
• Orienturus
• Orlovia
• Orloviella
• Pachyaspidella
• Pachyaspis
• Palmerara ^[4]
• Palmeraspis
• Paleonelsonia ^[5]
• Panacus
• Paraeosoptychoparia
• Paragunnia
• Paramecephalus
• Paraperiomma
• Paraplagiura
• Parapoulsenia
• Parashuiyuella
• Paraziboaspis
• Perimetopus
• Periommella
• Piazella
• Pingluaspis
• Piochaspis
• Plagiura
• Pokrovskayaspis
• Poulsenella
• Poulsenia
• Poulseniella
• Probowmania
• Probowmaniella
• Probowmanops
• Proliostracus
• Promeitania
• ?Protohedinia
• Pseudoliostracus
• Psilostracus
• Ptychoparella
• Ptychoparia
• Qiaotouaspis
• Qingshuiheia
• Rasettiella ^[3]
• Reedus
• Regina – Neoregina ^[2]
• Regius
• Runnania
• Salankanaspis
• Sanhuangshania
• Sanwania
• Schistometopus
• Semisphaerocephalus
• Seriaspis
• Shanganella
• Shantungaspis
• Shuiyuella
• Sinoptychoparia
• Spencella
• Spencia
• Stoecklinia
• Sujaraspis
• Suluktella
• Taijiangia
• Taniaspidella
• ?Townleyella
• Trachyostracus
• Trigonyangaspis
• Tukalandaspis
• ?Ulrichaspis
• Variopelta
• Vermontella
• Vica
• Volocephalina
• Wanhuaia
• Weijiaspis
• Wuhaina
• Xiangshanaspis
• Xingrenaspis
• Yaoyiayuella
• Yohoaspis
• Yuknessaspis
• Ziboaspidella
• Ziboaspis

Notes and References

1. Web site: Order Ptychopariida . S. M. Gon III . November 15, 2010.
2. Hüseyin Özdikmen . 2006 . Nomenclatural changes for fourteen trilobites genera . . 1 . 2 . 179–190 .
3. Hüseyin Özdikmen . 2005 . Homonymous generic names in Trilobites based on Nomenclator Zoologicus, vols. 1-9, A to M . . 39 . 5 . 563–564.
4. Hüseyin Özdikmen . 2009 . Nomenclatural changes for twenty trilobites genera . . 4 . 1 . 155–171 .
5. Hüseyin Özdikmen . 2009 . Nomenclatural changes for three preoccupied trilobites genera . . 3 . 1 . 317–320 .