Species

Xiphograptus robustus (Ekström, 1937)

Synonymy list

1937 Didymograptus robustus n. sp. — Ekström , pp. 25, fig. 1:1-4; 2:1-2

1964 Didymograptus robustus norvegicus n. ssp. — Berry , pp. 105, fig. 7:1-3

1995 Xiphograptus robustus (Ekström) — Maletz , pp. 250

1997 Xiphograptus robustus (Ekström) — Maletz , pp. 31, fig. Pl 1; C, 12A-I

1998 Xiphograptus robustus (Ekström, 1937) — Maletz , pp. 358, fig. 7G

2010 Xiphograptus robustus (Ekström, 1937) — Maletz , pp. 429, fig. 8H, L

2017 Xiphograptus robustus (Ekström, 1937) — Chen, X. et al. , pp. 120, fig. Figs. 6-12A, C–E, J

Selection of related publications

Maletz, J. 2010. Xiphograptus and the evolution of virgella-bearing graptoloids. Palaeontology 53, 2, 415-439. DOI:10.1111/j.1475-4983.2010.00940.x

Maletz, J. 1997. Graptolites from the Nicholsonograptus fasciculatus and Pterograptus elegans Zones (Abereiddian, Ordovician) of the Oslo Region, Norway. Greifswalder Geowissenschaftliche Beiträge 4, 5-98.

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Hemichordata
Class	Pterobranchia
Subclass	Graptolithina
Order	Graptoloidea
Suborder	Dichograptina
Family	Pterograptidae
Genus	Xiphograptus
Species	formosus
	lofuensis
	norvegicus
	patulentis
	robustus

References based on distribution

Maletz, 2010a Fågelsång outcrop, Sweden Middle Ordovician
Maletz, 2010a Ordovician
Maletz, 1997c Slemmestad, Norway