Subspecies
Orthograptus calcaratus incisus (Lapworth, 1908)
Synonymy list
2015     Orthograptus calcaratus incisus — Goldman et al. , pp. 3
Selection of related publications
Goldman, D., Nõlvak, J., Maletz, J. 2015. Middle to Late Ordovician graptolite and chitinozoan biostratigraphy of the Kandava-25 drill core in western Latvia.  GFF   137,   3,   197-211. DOI:10.1080/11035897.2015.1021375
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Hemichordata | 
| Class | Pterobranchia | 
| Subclass | Graptolithina | 
| Order | Graptoloidea | 
| Suborder | Axonophora | 
| Infraorder | Diplograptina | 
| Subfamily | Peiragraptinae | 
| Genus | Orthograptus | 
| Species | calcaratus | 
| Subspecies | incisus | 
References based on distribution
- Goldman et al., 2015a Kandava 25 borehole Kukruse Stage