Species
Parapetalolithus palmeus (Barrande, 1850)
Synonymy list
1850     Graptolithus palmeus var. lata — Barrande , pp. 61, fig. 3:3-4
1908     Petalograptus palmeus s. str. (Barrande) — Elles & Wood , pp. 274-275, fig. 32:1d
1920     Diplograptus (Petalograptus) palmeus (Barrande) — Gortani , fig. 1:35
1924     Diplograptus palmeus Barrande — Hundt , pp. 58, fig. 2:24-26
1933     Petalograptus palmeus (Barrande) — Sun , pp. 31-32, fig. 5:4a-b
1949     Diplograptus (Petalograptus) palmeus (Barrande) — Obut , pp. 15, fig. 1:7a-b
1996     Petalograptus palmeus palmeus (Barrande) — Churkin & Carter , pp. 58, fig. 39 A, B, H
1998     Parapetalolithus palmeus Barrande) — Gutierrez-Marco & Storch , pp. 77; 84, fig. 4; 8g
2015     Petalolithus palmeus (Barrande, 1850) — Maletz & Steiner , fig. 6A
2021     Parapetalolithus palmeus (Barrande, 1850) — Hopfensperger et al. , pp. 281, fig. 1C,F; 3E,G-I,K
Selection of related publications
Ulst, R. Ž., Gailite, L. K., Springis, T. K. 1984. Lithostratigraphic subdivision of the subsurface Ordovician rocks of the Jelgeva Depression.  Stratigrafiâ drevnepaleozojskih otloženij Pribaltiki, pp. 63-76.   Eesti NSV Teaduste Akadeemia. 
Paškevičius, J. 1979. Biostratigraphy and Graptolites of the Lithuanian Silurian. pp. 1-267.  Mokslas. 
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Hemichordata | 
| Class | Pterobranchia | 
| Subclass | Graptolithina | 
| Order | Graptoloidea | 
| Suborder | Axonophora | 
| Superfamily | Retiolitoidea | 
| Family | Retiolitidae | 
| Subfamily | Petalolithinae | 
| Genus | Parapetalolithus | 
| Species | altissimus | 
| elongatus | |
| hispanicus | |
| kunkojensis | |
| ovatus | |
| palmeus | |
| schaueri | |
| tenuis | 
References based on distribution
- Ulst et al., 1984 Atashiene 9 borehole Llandovery
- Ulst et al., 1984 Kybartai 14 borehole Llandovery
- Paškevičius, 1979 Kunkojai 12 borehole Llandovery