Portal of Graptolite and Pterobranch Hemichordates
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Graptolite Net | Graptolites & Graptoliters | Rhabdopleuroidea | Cephalodiscoidea | Crustoidea | Camaroidea | Tuboidea | Dendroidea | Graptoloidea
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. Family Monograptidae Lapworth, 1873
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Enigmagraptus Rickards and Wright, 2004 Type species: Enigmagraptus yassenensis (Rickards and Wright, 1999)
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The monograptid graptoloid genus Enigmagraptus Rickards and Wright comprises a group of the smallest known graptolites. All species are of Pridoli age, Silurian, New South Wales, Australia.
Diagnosis: "One of the tiniest graptolites known, with a dorsoventral width up to 0.25 mm, widely spaced, axially elongate prothecae usually developed from thread-like origin; tiny metatheca up to half rhabdosome width comprising a hood derived from the dorsal metathecal wall, and variously enrolled ventrally to enclose the simple ventral margin; small sicula with virgella and dorsal apertural process in type species." (Rickards and Wright 2004, p. 192).
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E. yassensis HOLOTYPE Scale: 1mm (from Rickards & Wright)
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Species assigned:
Enigmagraptus yassensis (Rickards and Wright, 1999) Enigmagraptus mitchelli (Rickards and Wright, 1999) Enigmagraptus pennyae Rickards and Wright, 2004
Previously, Rickards and Wright (1999) referred the type species of the genus Enigmagraptus doubtfully to the genus Neocucullograptus Urbanek, 1970.
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GRAPTOLITE NET is edited and periodically updated by Dr Piotr Mierzejewski, Count of Calmont since 2002
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