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From 1909 onwards, ''Kentrosaurus'' remains were uncovered in four quarries in the ''Mittlere Saurierschichten'' (Middle Saurian Beds) and one quarry in the ''Obere Saurierschichten'' (Upper Saurian Beds).<ref name=MallisonRealLecto/> During four field seasons, the German Expedition found over 1200 bones of ''Kentrosaurus'', belonging to about fifty individuals,<ref name=Hennig1925/> many of which were destroyed during the Second World War.<ref name=Maier2003/> Today, almost all remaining material is housed in the [[Museum für Naturkunde]] Berlin (roughly 350 remaining specimens), while the museum of the Institute for Geosciences of the [[University of Tübingen]] houses a composite mount, roughly 50% of it being original bones.<ref name=MallisonRealLecto/>
[[File:Fossil_Kentrosaurus_aethiopicus_in_Museum_für_Naturkunde_Berlin_001.JPG|right|thumb|Lateral view of a skeleton on display at the [[Museum für Naturkunde]], Berlin]]
In the original description, Hennig did not designate a [[holotype]] specimen. However, in a detailed monography on the osteology, systematic position and palaeobiology of ''Kentrosaurus'' in 1925, Hennig picked the most complete partial skeleton, today inventorised as '''MB.R.4800.1 through MB.R.4800.37''', as a lectotype (see [[syntype]]).<ref name="Hennig19252" /> This material includes a nearly complete series of tail vertebrae, several vertebrae of the back, a [[sacrum]] with five sacral vertebrae and both [[Ilium (bone)|ilia]], both [[Femur|femora]] and an [[ulna]], and is included in the mounted skeleton at the [[Museum für Naturkunde]] in [[Berlin]], [[Germany]]. The type locality is Kindope, [[Tanzania]], north of Tendaguru hill.<ref>Janensch,
Unaware that Hennig had already defined a lectotype, [[Peter Galton]]<ref name="Galton1982" /> selected two dorsal vertebrae, specimens MB.R.1930 and MB.R.1931, from the material figured in Hennig's 1915 description, as 'holotypes'. This definition of a holotype is not valid, because Hennig's selection has priority. In 2011, [[Heinrich Mallison]] clarified that all the material known to Hennig in 1915, i.e. all the bones discovered before 1912, when [[Hermann Heck]] concluded the last German excavations, are [[Paralectotype|paralectotypes]], and that MB.R.4800 is the correct lectotype.<ref>Mallison, H. (2011). The real lectotype of Kentrosaurus aethiopicus HENNIG, 1915. ''Neues Jahrbuch für Geologie und Paläontologie-Abhandlungen'', 197-206.</ref>
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