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Campograptus

Classification

    Phylum:  
Hemichordata
    Class:  
Pterobranchia
    Order:  
Graptoloidea
    Superfamily:  
Neograptina
    Family:  
Monograptidae
    Formal Genus Name and Reference:  
Campograptus OBUT, 1949, p. 24
    Type Species:  
*Monograptus convolutus var. communis Lapworth, 1876b, p. 358, SD OBUT, 1964, p. 328


Images

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Fossil Image
Fig. 300, 1a-b. *C. communis (Lapworth), la, lectotype (Р̈ibyl, 1948a, p. 48), BU 1684a, proximal end not shown (Lapworth, 1876b, fig. 4a), 1 b , proximal end in relief, internal mould, SM A24487, C horizon (Demirastrites triangulatus Biozone), Rheidol Gorge (Sudbury, 1958, fig. 20). Scale bars, 1 mm


Synonyms

Monograptus


Geographic Distribution

worldwide


Age Range

    Beginning Stage in Treatise Usage:  
Silurian (Llandovery (Aeronian, Demirastrites triangulatus Biozone))
    Beginning International Stage:  
Aeronian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
440.49
    Ending Stage in Treatise Usage:  
Silurian, Llandovery (Aeronian, Stimulograptus sedgwickii Biozone)
    Ending International Stage:  
Aeronian
    Fraction Up In Ending Stage:  
0
    Ending Date:  
438.59


Description

Tubarium gently to strongly dorsally curved proximally, becoming almost straight distally, thecae triangular with no overlap, prothecal bases broad, simply hooked metathecae, thecal hook proximally involving primarily dorsal and, to much lesser extent, ventral thecal wall, and mesially and distally probably dorsal wall only, thecal apertures of proximal, mesial and, in some species, even distal thecae possess paired ventro-laterally or proximo-laterally directed spines, proximal thecae may be axially elongated




References

Obut, A. M. 1949. Polevoi atlas rukovodyashchikh graptolitov verkhnego silura Kirgizskoi SSR. [Field Atlas of leading graptolites of the Upper Silurian of Kirgiz SSR.] Akademia. Nauk SSSR, Kirgiz. Filial, Geologii Institut. Frunze. 56 p. 7 pl. In Russian.


Museum or Author Information

SM, BU, Р̈ibyl, 1948, Lapworth, 1876, Sudbury, 1958