| Hormograptus Ă–pik, 1930 Type species: Thallograptus sphaericola Ă–pik, 1928 |
| Crustoid graptolites (Crustoidea) |
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The only genus of the family Hormograptidae
erected by O.M.B. Bulman (1970).
Diagnosis:
"?Aberrant Crustoidea. Rhabdosome
encrusting, irregularly branching; stolon
system well developed, with triad budding
commonly related to two stolothecae and an
autotheca; autothecae adherent proximally,
distally unknown; bithecae possibly absent or
irregularly developed." (Bulman 1970, pp. V52-
V53).
Mierzejewski (1985) wrote: "This diagnosis of the
Hormograptidae was based only on observations made by
Kozlowski on Hormograptus sphaericola (Ă–pik). It is worth
noting that these observations were unillustrated and quite
different from earlier observations published by Obut
(1960), who reported only diad budding in this form)."
erected by O.M.B. Bulman (1970).
Diagnosis:
"?Aberrant Crustoidea. Rhabdosome
encrusting, irregularly branching; stolon
system well developed, with triad budding
commonly related to two stolothecae and an
autotheca; autothecae adherent proximally,
distally unknown; bithecae possibly absent or
irregularly developed." (Bulman 1970, pp. V52-
V53).
Mierzejewski (1985) wrote: "This diagnosis of the
Hormograptidae was based only on observations made by
Kozlowski on Hormograptus sphaericola (Ă–pik). It is worth
noting that these observations were unillustrated and quite
different from earlier observations published by Obut
(1960), who reported only diad budding in this form)."
| _____________________________________________________________________________________________ Edited by Piotr Mierzejewski, the Count of Calmont and Countess Maja Anna Korwin-Kossakowska 2004 |
| Hormograptus sphaericola (Ă–pik) from the Ordovician of Estonia (from Ă–pik) |