Asterostomatidae

Platybrissus roemeri, copyright Koghisberg's Collections.

Belongs within: Atelostomata.

The Asterostomatidae is a possibly polyphyletic group of heart urchins characterised by the loss of petals and/or fascioles (Fischer 1966).

Characters (from Fischer 1966): Peristome labiate, phyllodes well developed, test generally fragile; radioles usually present; petals weakly developed or absent, fascioles of various types or absent; primary spines present or absent; apical system ethmolytic; plastron mesamphisternous, holamphisternous or ultramphisternous.

<==Asterostomatidae [Antillasterinae, Asterostomatina, Palaeopneustidae, Paleopneustidae] F66
    |--Asterostoma Agassiz 1847 F66
    |    `--*A. excentricum Agassiz 1847 F66
    |--Antillaster Lambert 1909 [=Pseudasterostoma Sánchez Roig 1952 non Duncan 1889] F66
    |    `--*A. cubensis (Cotteau 1871) [=Asterostoma cubensis, *Pseudasterostoma cubensis] F66
    |--Brissolampas Pomel 1883 F66
    |    `--*B. conicus (Dames 1877) [=Paleopneustes conicus] F66
    |--Brissomorpha Laube 1871 F66
    |    `--*B. fuchsi Laube 1871 F66
    |--Cleistechinus De Loriol 1882 F66
    |    `--*C. canaverii De Loriol 1882 F66
    |--Delopatagus Koehler 1907 F66
    |    `--*D. brucei Koehler 1907 F66
    |--Elipneustes Koehler 1914 [incl. Eurypneustes Koehler 1914 non Duncan & Sladen 1882] F66
    |    `--*E. denudatus (Koehler 1914) [=Eurypneustes denudatus] F66
    |--Genicopatagus Agassiz 1879 F66
    |    `--*G. affinis Agassiz 1879 F66
    |--Linopneustes Agassiz 1881 F66
    |    `--*L. murrayi (Agassiz 1873) [=Palaeopneustes murrayi] F66
    |--Megapetalus Clark 1929 F66
    |    `--*M. lovenioides Clark 1929 F66
    |--Moronaster Sánchez Roig 1952 F66
    |    `--*M. moronensis Sánchez Roig 1952 F66
    |--Palaeobrissus Agassiz 1883 [=Palaeobryssus Meissner 1903] F66
    |    `--*P. hilgardi Agassiz 1883 [=*Palaeobryssus hilgardi] F66
    |--Palaeotropus Lovén 1872 F66
    |    `--*P. josephinae Lovén 1872 F66
    |--Paleopneustes Agassiz 1873 [=Palaeopneustes Duncan 1889] F66
    |    `--*P. cristatus Agassiz 1873 [=*Palaeopneustes cristatus] F66
    |--Paleotrema Koehler 1914 [=Palaeotrema (l. c.)] F66
    |    `--*P. loveni (Agassiz 1881) [=Palaeotropus loveni] F66
    |--Peripatagus Koehler 1895 F66
    |    `--*P. cinctus Koehler 1895 F66
    |--Plesiozonus de Meijere 1902 F66
    |    `--*P. hirsutus de Meijere 1902 F66
    |--Prosostoma Pomel 1883 [=Pseudasterostoma Duncan 1889] F66
    |    `--*P. jimenoi (Cotteau 1870) [=Asterostoma jimenoi, *Pseudasterostoma jimenoi] F66
    |--Pycnolampas Agassiz & Clark 1907 F66
    |    `--*P. oviformis Agassiz & Clark 1907 F66
    |--Pygospatangus Cotteau 1888 F66
    |    `--*P. salvae Cotteau 1888 F66
    |--Argopatagus Agassiz 1879 [incl. Meijeria Döderlein 1906, Phrissocystis Agassiz 1898] F66
    |    |--*A. vitreus Agassiz 1879 F66
    |    |--‘*Phrissocystis’ aculeata Agassiz 1904 F66
    |    `--‘Phrissocystis’ humilis de Meijere 1902 [=*Meijeria humilis] F66
    |--Heterobrissus Manzoni & Mazzetti 1877 [incl. Archaeopneustes Gregory 1892] F66
    |    |--*H. montesi Manzoni & Mazzetti 1877 F66
    |    |--‘Palaeopneustes’ hystrix Agassiz 1880 [=*Archaeopneustes hystrix] F66
    |    `--H. niasicus F66
    `--Platybrissus Grube 1865 [=Platybryssus Meissner 1903] F66
         |--*P. (Platybrissus) roemeri Grube 1865 [=*Platybryssus roemeri] F66
         `--P. (Eurypatagus Mortensen 1948) F66
              `--P. (*E.) ovalis (Mortensen 1948) [=*Eurypatagus ovalis] F66

*Type species of generic name indicated

REFERENCES

[F66] Fischer, A. G. 1966. Spatangoids. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt U. Echinodermata 3 vol. 2 pp. U543–U628. The Geological Society of America, Inc., and The University of Kansas Press.