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Spirograptus

Classification

    Phylum:  
Hemichordata
    Class:  
Pterobranchia
    Order:  
Graptoloidea
    Superfamily:  
Neograptina
    Family:  
Monograptidae
    Formal Genus Name and Reference:  
Spirograptus GÜRICH, 1908, p. 34
    Type Species:  
*Graptolithus turriculatus Barrande, 1850, p. 56, SD BULMAN, 1929, p. 182


Images

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Fossil Image
Fig. 300,8. *S. turriculatus (Barrande), lectotype, NMP L27597, Litohlavy, Czech Republic, scale bar, 5 mm (Štorch, 2000c, Atlas, Folio 1.92)


Synonyms



Geographic Distribution

worldwide


Age Range

    Beginning Stage in Treatise Usage:  
Silurian (Aeronian, Stimulograptus halli Biozone
    Beginning International Stage:  
Aeronian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
440.49
    Ending Stage in Treatise Usage:  
Llandovery (Telychian, Streptograptus sartorius Biozone)
    Ending International Stage:  
Telychian
    Fraction Up In Ending Stage:  
0
    Ending Date:  
432.93


Description

Tubarium trochospirally coiled, sicula small (<1.5 mm) and dorsally curved, thecae hooked in manner of those of Stimulograptus, and bearing one or two apertural spines, thecal apertures may be symmetrical or asymmetrical resulting from differential development of the apertural margin, thecal overlap is negligible, common canal wide




References

Gürich, Georg. 1908. Leitfossilien. Ein Hilfsbuch zum Bestimmen von Versteinerungen bei geologischen Arbeiten in der Sammlung und im Felde. Erste Lieferung: Kambrium und Silur. (Bogen 1-6, Tafel 1-28 nebst Erklärungen). Verlag Gebrüder Bornträger. Berlin. 95 p., 28 pl.


Museum or Author Information

Štorch, 2000