Belongs within: Pelmatozoa.
Contains: Aristocystitidae, Protocrinitida, Sphaeronitidae.
The Diploporita are a Lower Ordovician to Lower Devonian group of echinoderms in which the thecal plates bear pore groups each located on a single plate.
Characters (from Kesling 1967): Thecal pores developed as units mostly confined to single plates, typically in form of diplopores but in some present as haplopores.
Diploporita [Diploporitidae, Gemellipora]
| i. s.: AristocystitidaeSG93
|--+--ProtocrinitidaK67
| `--Asteroblastida [Asterocystida]K67
| |--Mesocystis Bather 1898 (see below for synonymy)K67
| | |--*M. pusirefskii (Hoffman 1866) (see below for synonymy)K67
| | `--M. jaekeliK67
| `--Asteroblastidae [Asterocystidae]K67
| |--Metasterocystis Jaekel 1918K67
| | `--*M. micropelta Jaekel 1918K67
| |--Asterocystis Heackel 1896 non De Wild. 1893 (ICBN)K67
| | |--*A. tuberculatus (Schmidt 1874) [=Asteroblastus tuberculatus]K67
| | `--A. globula Jaekel 1918K67, J18 [=A. globulusK67]
| `--Asteroblastus Eichwald 1862K67
| |--A. foveolatus (Eichwald 1860) [=Protocrinites foveolatus; incl. *A. stellatus Eichwald 1862]K67
| |--A. regularis Jaekel 1918J18
| |--A. stellatusK67
| |--A. sublaevis Jaekel 1899SG93
| `--A. volborthiK67
`--Sphaeronitida [Sphaeronita]K67
|--SphaeronitidaeK67
|--Lichenoides Barrande 1887 non Hoffm. 1789 (ICBN)SG93 [=Lichenocystis Haeckel 1896U67; Lichenoidae, Lichenoididae]
| `--*L. priscus Barrande 1887U67, SG93 [=*Lichenocystis priscusU67]
`--HolocystitidaeSG93
|--Brightonicystis gregaria Paul 1971SG93
`--Holocystites Hall 1864 [=Holocystis Carpenter 1891, Megacystis Angelin 1878, Megacystites Hall 1865]K67
|--*H. cylindricus (Hall 1861) (see below for synonymy)K67
|--H. abnormisK67
|--H. adipatusK67
|--H. affinisK67
|--H. alternatus (Hall 1864)SG93
|--H. amplusK67
|--H. baculusK67
|--H. benedictiK67
|--H. brauniK67
|--H. canneusK67
|--H. collettiK67
|--H. commodusK67
|--H. dyeriK67
|--H. elegansK67
|--H. faberiK67
|--H. globosusK67
|--H. gorbyiK67
|--H. greenvillensisK67
|--H. indianensisK67
|--H. madisonensisK67
|--H. ornatissimusK67
|--H. ornatusK67
|--H. ovalisK67
|--H. papulosusK67
|--H. parvulusK67
|--H. parvusK67
|--H. perlongusK67
|--H. plenusK67
|--H. pustulosusK67
|--H. rotundusK67
|--H. scitulusK67
|--H. scutellatusK67
|--H. spangleriK67
|--H. sphaericusK67
|--H. sphaeroidalisK67
|--H. splendensK67
|--H. subovatusK67
|--H. subrotundusK67
|--H. tumidusK67
|--H. turbinatusK67
|--H. ventricosusK67
|--H. wetherbyiK67
|--H. winchelliK67
`--H. wykoffiK67*Holocystites cylindricus (Hall 1861) [=Caryocystites cylindricum, *Holocystis cylindrica, *Megacystis cylindrica, *Megacystites cylindricus]K67
Mesocystis Bather 1898 [=Mesites Hoffman 1866 nec Schönherr 1838 nec Geoffroy-St. Hilaire 1838 nec Jenyns 1842; Mesocystidae]K67
*Mesocystis pusirefskii (Hoffman 1866) [=*Mesites pusirefskii, Agelacrinus pusyrewskii, Mesocystis pusireffskyi, Mesocystis pusirefski, Mesocystis pusirewskii]K67
*Type species of generic name indicated
References
[J18] Jaekel, O. 1918. Phylogenie und System der Pelmatozoen. Paläontologische Zeitschrift 3: 1–128.
[K67] Kesling, R. V. 1967. Cystoids. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt S. Echinodermata 1. General characters. Homalozoa—Crinozoa (except Crinoidea) vol. 1 pp. S85–S267. The Geological Society of America, Inc., and The University of Kansas: Lawrence (Kansas).
[SG93] Simms, M. J., A. S. Gale, P. Gilliland, E. P. F. Rose & G. D. Sevastopulo. 1993. Echinodermata. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 491–528. Chapman & Hall: London.
[U67] Ubaghs, G. 1967. Eocrinoids. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt S. Echinodermata 1. General characters. Homalozoa—Crinozoa (except Crinoidea) vol. 2 pp. S455–S495. The Geological Society of America, Inc., and The University of Kansas: Lawrence (Kansas).