
Belongs within: Terebratulida.
Contains: Dielasma, Hemiptychina.
The Dielasmatidae are a family of smooth to plicate brachiopods known from the Lower Carboniferous to the Lower Jurassic (Muir-Wood et al. 1965).
Characters (Muir-Wood et al. 1965): Smooth to plicate, folded or unfolded shells; pedicle valve with or without dental plates; brachial valve with terebratuliform loop and modified cardinal plate which is either divided or supported by septum.
<==DielasmatidaeM-WS65
| i. s.: Cruratula Bittner 1890M-WS65
| `--*C. eudora (Laube 1866) [=Waldheimia eudora]M-WS65
| Pseudokingena Böse & Schlosser 1900M-WS65
| `--*P. deslongchampsi (Davidson 1850) [=Terebratulina deslongchampsi]M-WS65
|--Centronelloidea Weller 1914 [Centronelloideinae]M-WS65
| `--*C. rowleyi (Worthen 1884) [=Terebratula rowleyi]M-WS65
|--Brachyzyga Kozlowski 1929HB93, M-WS65 [BrachyzyginaeM-WS65]
| `--*B. pentameroides Kozlowski 1929M-WS65
|--NucleatulinaeM-WS65
| |--Nucleatula Bittner 1888M-WS65
| | `--*N. retrocita (Suess 1855) [=Rhynchonella retrocita]M-WS65
| |--Dinarella Bittner 1892M-WS65
| | `--*D. haueri Bittner 1892M-WS65
| `--Propygope Bittner 1890M-WS65
| `--*P. hagar (Bittner 1890) [=Terebratula (*Propygope) hagar]M-WS65
|--Cranaeninae [Cranaenidae]HB93
| |--Cranaena Hall & Clarke 1893 [incl. Cranaenella Fenton & Fenton 1924, Eunella Hall & Clarke 1893]M-WS65
| | `--*C. romingeri (Hall 1863) [=Terebratula romingeri]M-WS65
| |--Hamburgia Weller 1911 [incl. Stuartella Belanski 1929]M-WS65
| | `--*H. typa Weller 1911M-WS65
| `--Maclarenella Stehli 1955M-WS65
| `--*M. maculosa Stehli 1955M-WS65
|--Juvavellinae [Juvavellinen]M-WS65
| |--Juvavella Bittner 1888M-WS65
| | `--*J. suessi Bittner 1888M-WS65
| |--Aspidothyris Diener 1908M-WS65
| | `--*A. kraffti Diener 1908M-WS65
| |--Cubanothyris Dagis 1959M-WS65
| | `--*C. elegans Dagis 1959M-WS65
| |--Juvavellina Bittner 1896M-WS65
| | `--*J. kittli Bittner 1896M-WS65
| `--Wittenburgella Dagis 1959M-WS65
| `--*W. minuta Dagis 1959M-WS65
|--MutationellinaeM-WS65
| |--Podolella Kozlowski 1929B75, M-WS65
| | `--*P. rensselaeroides Kozłowski 1929M-WS65
| `--+--Mutationella Kozlowski 1929B75, M-WS65
| | `--*M. podolica (Siemiradzki 1906) [=Waldheimia podolica]M-WS65
| |--Cloudella Boucot & Johnson 1963B75, M-WS65 [=Pleurothyris Cloud 1942 nec Lowe 1843 nec Schrammen 1912M-WS65]
| | `--*C. stewarti (Clarke 1907) [=Renssalaeria stewarti, *Pleurothyris stewarti]M-WS65
| |--Derbyina Clarke 1913B75, M-WS65
| | `--*D. smithi (Derby 1890) [=Notothyris smithi]M-WS65
| |--Mendathyris Cloud 1942B75, M-WS65
| | `--*M. mainensis (Williams 1900) [=Rensselaeria mainensis]M-WS65
| |--Paranaia Clarke 1913B75, M-WS65 (see below for synonymy)
| | `--*P. margarida (Derby 1890) [=Centronella margarida]M-WS65
| |--Scaphiocoelia Whitfield 1891B75, M-WS65
| | `--*S. boliviensis Whitfield 1891M-WS65
| `--Pleurothyrella Boucot, Caster et al. 1963B75, M-WS65
| |--*P. africana (Reed 1906) [=Scaphiocoelia africana]M-WS65
| `--P. venustaC68
`--Dielasmatinae [Zugmayeridae]M-WS65
|--DielasmaDX84
|--HemiptychinaM-WS65
|--Balanoconcha Campbell 1957M-WS65
| `--*B. elliptica Campbell 1957M-WS65
|--Dielasmina Waagen 1882M-WS65
| `--*D. plicata Waagen 1882M-WS65
|--Lowenstamia Stehli 1961M-WS65
| `--*L. texana Stehli 1961M-WS65
|--Whitspakia Stehli 1961 [incl. Pakistania Stehli 1961 non Eames 1952]M-WS65
| `--*W. biplex (Waagen 1882) [=Dielasma biplex]M-WS65
|--Yochelsonia Stehli 1961M-WS65
| `--*Y. thomasi Stehli 1961M-WS65
|--Adygella Dagis 1959M-WS65
| `--*A. cubanica Dagis 1959M-WS65
|--Adygelloides Dagis 1959M-WS65
| `--*A. labensis Dagis 1959M-WS65
|--Coenothyris Douvillé 1879M-WS65
| `--*C. vulgaris (von Schlotheim 1820) [=Terebratulites vulgaris]M-WS65
|--Rhaetina Waagen 1882M-WS65
| `--*R. gregaria (Suess 1854) [=Terebratula gregaria]M-WS65
|--Zugmayeria Waagen 1882M-WS65
| `--*Z. rhaetica (Zugmayer 1880) [=Terebratula rhaetica]M-WS65
`--Fletcherithyris Campbell 1965 [=Fletcherina Stehli 1961 non Lang, Smith & Thomas 1955]M-WS65
|--‘Dielasma sacculum’ bensoni Finlay 1927F27 (see below for synonymy)
|--F. farleyensis Campbell 1965F71
|--F. illawarrensis Campbell 1965F71
`--F. parkesi Campbell 1965F71