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Paraplectograptus

Classification

    Phylum:  
Hemichordata
    Class:  
Pterobranchia
    Subclass:  
Graptolithina
    Order:  
Graptoloidea
    Suborder:  
Axonophora
    Infraorder:  
Neograptina
    Superfamily:  
Retiolitoidea
    Family:  
Retiolitidae
    Subfamily:  
Retiolitinae
    Formal Genus Name and Reference:  
Paraplectograptus BouČeк & MÜNCH, 1952, p. 37
    Type Species:  
*Retiolites eiseli MANCK, 1918, p. 338, M


Images

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Fossil Image
Fig. 277,6a. P. praemacilentus, holotype, NM L2727, Wenlock, lower Homerian, Cyrtograptus lundgreni Biozone, Bítov, Czech Republic, scale bar, 1 mm (new), Fig. 277,6b. P. simplex Kozłowska-Dawidziuk, 1995, GSC 119772, Wenlock, Cyrtograptus perneri Biozone, Arctic Canada, scale bar, 1 mm (Lenz & Kozłowska-Dawidziuk, 2001, pl. 7), Fig. 277,6c. * P. eiseli (Manck) lectotype, BAF 8/159, ancora umbrella portion missing, Llandovery, middle Telychian, Monoclimacis griestoniensis Biozone, Wetterahammer, Thuringia, Germany, scale bar, 1 mm (new), Fig. 277,6d. P. senarius Lenz & others, 2012, GSC134631, Wenlock, Cyrtograptus perneri Biozone, Arctic Canada, scale bar, 1 mm (Lenz & others, 2012, pl. 1)


Synonyms



Geographic Distribution

worldwide


Age Range

    Beginning Stage in Treatise Usage:  
Silurian (Sheinwoodian, Monograptus riccartonensis Biozone)
    Beginning International Stage:  
Sheinwoodian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
432.93
    Ending Stage in Treatise Usage:  
Silurian (lower Homerian, Cyrtograptus lundgreni Biozone)
    Ending International Stage:  
Homerian
    Fraction Up In Ending Stage:  
50
    Ending Date:  
428.68


Description

Slender, parallel-sided to distally widening or finite tubarium, ancora umbrella with seven meshes and often incomplete rim, nema with connecting lists, ventral sides formed by thecal lips, short lateral apertural lists, and long pleural lists, transverse lists present, ancora sleeve lists well developed to lacking, ancora sleeve lists with seams facing outward, bandages with pustules




References

Bouček, Bedřich, & Arthur Münch. 1952. Retioliti stredoevropskeho svrchniho wenlocku a ludlowu. [The central European retiolites of the Upper Wenlock and Ludlow.] Sborník Ústredniho Ústavu Geologickeho, oddíl Paleontologicky 19:1-54 (Czech), 55-103 (Russian), 104-151 (English), 1 pl.


Museum or Author Information

GSC, BAF, NM, Lenz & Kozłowska-Dawidziuk, 2001, Lenz & others, 2012