Lobatiradiata

Dicranastrum furcatum, from here.

Belongs within: Stauraxonaria.

The Lobatiradiata are a group of radiolarians, known from the Middle Triassic to the present, in which the flattened skeleton is extended into radiating arms or lobes (Afanasieva et al. 2005).

Characters (from Afanasieva et al. 2005): Flattened spherical skeleton, with two to six lobes (arms), with or without pylome. Heteropolar microsphere consisting of quadrangular primary ring, four-pillared apical cap with apical bar in vault, forming an H-shaped structure, and antapical cap with one or two pores in vault. Apical bar with long primary apical bar in its proximal part, with two oppositely located branches lying in plane vertical to plane of apical bar. Four angles of primary quadrangular ring possessing four primary bars, of which two are short and two are long, continuing toward exterior into spines or lobes (arms). These all usually with proximal verticils composed of two processes lying in plane vertical to that of primary ring. Upper part of first microspherical shell with more or less regular cross-shaped structure.

<==LobatiradiataAA05
    |--AngulobracchiidaeAA05
    |    |--Angulobracchia Baumgartner 1980AA05
    |    |--Bistarkum Yeh 1987AA05
    |    |--Cyclastrum Ruest 1898AA05
    |    |--Danubea Whalen & Carter 1998AA05
    |    |--Deviatus Li 1986 [incl. Foremanella Muzavor 1977 (nom. inv.)]AA05
    |    |--Loupanus Carter 1993AA05
    |    |--Protopsium Pessagno & Poisson 1981AA05
    |    |--‘Risella’ Carter 1993 non Gray 1842AA05
    |    |--Sontonaella Yeh 1987AA05
    |    |--Thurstonia Whalen & Carter 1998AA05
    |    `--Paronaella Pessagno 1971AA05
    |         `--P. mulleriAA05
    |--HagiastridaeAA05
    |    |--Pseudocrucella Baumgartner 1980AA05
    |    |--Archaeohagiastrum Baumgartner 1984AA05
    |    |--Hagiastrum Haeckel 1881AA05
    |    |--Higumastra Baumgartner 1980AA05
    |    |--Orbiculiforma Pessagno 1973AA05
    |    |--Paratriassoastrum Kozur & Mostler 1981AA05
    |    |--Pentaporobrachia Kozur & Mostler 1981AA05
    |    |--Pseudohagiastrum Pessagno 1979AA05
    |    |--Pseudohigumastra Yang 1993AA05
    |    |--Saldorfus Pessagno, Blome & Hull 1993AA05
    |    |--Savaryella Jud 1994AA05
    |    |--Sophia Whalen & Carter 1998AA05
    |    |--Tetraditryma Baumgartner 1980AA05
    |    |--Tetraporobrachia Kozur & Mostler 1979AA05
    |    |--Tetratrabs Baumgartner 1980AA05
    |    |--Udalia Whalen & Carter 1998AA05
    |    `--Crucella Pessagno 1971AA05
    |         `--C. euganeaAA05
    `--+--HexaporobrachiidaeAA05
       |    |--Hexaporobrachia Kozur & Mostler 1979AA05
       |    `--Icrioma De Wever 1979AA05
       |         `--I. tetrancistrumAA05
       |--PatulibracchiidaeAA05
       |    |--Archaeotritrabs Steiger 1992AA05
       |    |--Ditrabs Baumgartner 1980AA05
       |    |--Homoeoparonaella Baumgartner 1980AA05
       |    |--Neoparonaella Yang 1993AA05
       |    |--Patulibracchium Pessagno 1971AA05
       |    |--Pessagnobracckia Kozur & Mostler 1978AA05
       |    |--Trimanicula Dumitrica 1991AA05
       |    |--Tritrabs Baumgartner 1980AA05
       |    `--Halesium Pessagno 1971AA05
       |         `--H. sexangulumAA05
       `--+--Suttonium Schaaf 1976 [Suttoniidae]AA05
          |    `--S. praedicatorAA05
          `--MyelastridaeAA05
               |--Pentaphiastrum Haeckel 1887AA05
               |--Tetracranastrum Haeckel 1887AA05
               |--Triastrum Cleve 1901AA05
               |--Myelastrum Haeckel 1887AA05
               |    |--M. dodecacerosH04
               |    `--M. papilioH04
               `--Dicranastrum Haeckel 1881AA05
                    |--D. bifurcatumH04
                    |--D. furcatumH04
                    `--D. wyvelleiAA05

*Type species of generic name indicated

References

[AA05] Afanasieva, M. S., E. O. Amon, Y. V. Agarkov & D. S. Boltovskoy. 2005. Radiolarians in the geological record. Paleontological Journal 39 (Suppl. 3): S135–S392.

[H04] Haeckel, E. 1899–1904. Kunstformen der Natur. Bibliographisches Institut: Leipzig und Wien.

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