@article{GeyerLanding2021,
  author    = {Geyer, Gerd and Landing, Ed},
  title     = {The Souss lagerstatte of the Anti-Atlas, Morocco: discovery of the first Cambrian fossil lagerstatte from Africa},
  series = {Scientific Reports},
  volume    = {11},
  journal   = {Scientific Reports},
  number    = {1},
  doi       = {10.1038/s41598-021-82546-0},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-259236},
  pages     = {3107},
  year      = {2021},
  abstract  = {Episodic low oxygenated conditions on the sea-floor are likely responsible for exceptional preservation of animal remains in the upper Amouslek Formation (lower Cambrian, Stage 3) on the northern slope of the western Anti-Atlas, Morocco. This stratigraphic interval has yielded trilobite, brachiopod, and hyolith fossils with preserved soft parts, including some of the oldest known trilobite guts. The "Souss fossil lagerstatte" (newly proposed designation) represents the first Cambrian fossil lagerstatte in Cambrian strata known from Africa and is one of the oldest trilobite-bearing fossil lagerstatten on Earth. Inter-regional correlation of the Souss fossil lagerstatte in West Gondwana suggests its development during an interval of high eustatic levels recorded by dark shales that occur in informal upper Cambrian Series 2 in Siberia, South China, and East Gondwana.},
  language  = {en}
}
@article{GeyerPaisWotte2020,
  author    = {Geyer, Gerd and Pais, Miguel Caldeira and Wotte, Thomas},
  title     = {Unexpectedly curved spines in a Cambrian trilobite: considerations on the spinosity in Kingaspidoides spinirecurvatus sp. nov. from the Anti-Atlas, Morocco, and related Cambrian ellipsocephaloids},
  series = {PalZ},
  volume    = {94},
  journal   = {PalZ},
  issn      = {0031-0220},
  doi       = {10.1007/s12542-020-00514-x},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-231873},
  pages     = {645-660},
  year      = {2020},
  abstract  = {The new ellipsocephaloid trilobite species Kingaspidoides spinirecurvatus has a spectacular morphology because of a unique set of two long and anteriorly recurved spines on the occipital ring and the axial ring of thoracic segment 8. Together with the long genal spines this whimsical dorsally directed spine arrangement is thought to act as a non-standard protective device against predators. This is illustrated by the body posture during different stages of enrolment, contrasting with the more sophisticated spinosities seen in later trilobites, which are discussed in brief. Kingaspidoides spinirecurvatus from the lower-middle Cambrian boundary interval of the eastern Anti-Atlas in Morocco has been known for about two decades, with specimens handled as precious objects on the fossil market. Similar, but far less spectacular, spine arrangements on the thoracic axial rings are known from other ellipsocephaloid trilobites from the Anti-Atlas of Morocco and the Franconian Forest region of Germany. This suggests that an experimental phase of spine development took place within the Kingaspi-doides clade during the early-middle Cambrian boundary interval.},
  language  = {en}
}
@article{GeyerLandingMeieretal.2023,
  author    = {Geyer, Gerd and Landing, Ed and Meier, Stefan and H{\"o}hn, Stefan},
  title     = {Oldest known West Gondwanan graptolite: Ovetograptus? sp. (lower Agdzian/lowest Wuliuan; basal Middle Cambrian) of the Franconian Forest, Germany, and review of pre-Furongian graptolithoids},
  series = {Pal{\"a}ontologische Zeitschrift},
  volume    = {97},
  journal   = {Pal{\"a}ontologische Zeitschrift},
  number    = {4},
  issn      = {0031-0220},
  doi       = {10.1007/s12542-022-00627-5},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-324099},
  pages     = {677-686},
  year      = {2023},
  abstract  = {The occurrence of a likely graptolite in lowest Wuliuan strata of the Franconian Forest almost certainly records the oldest known graptolithoid hemichordate in West Gondwana and possibly the oldest graptolite presently known. The fossil is a delicate, erect, apparently unbranched rhabdosome with narrow thecae tentatively assigned to the poorly known genus Ovetograptus of the Dithecodendridae. This report includes an overview of pre-Furongian graptolithoids with slight corrections on the stratigraphic position of earlier reported species.},
  language  = {en}
}