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Declivolithus titan is a Junior Synonym of Declivolithus alfredi
piranha posted a topic in Fossil News
Today we get a new paper that has reclassified "Declivolithus titan" as a junior synonym of: Declivolithus alfredi. Richard Fortey provided a detailed review, we can safely assume that this revision is well reasoned on solid ground. The time has arrived for all the conscientious trilobite aficionados around the world to make new labels! Pereira et al. 2024: "With this revision, we not only clarify the identity of previously reported species of the Declivolithus Fauna from Morocco, but also increased diversity and demonstrated that the famous Declivolithus titan, well known among collectors, is a junior synonym of the type species Declivolithus alfredi erected in the Czech Republic. Links to the Czech assemblages remained strong during the Late Ordovician. These data help improve paleogeographical reconstructions of the Gondwana margin in this time period, as well as provide new information on several phylogenetic lineages endemic to the peri-Gondwana realm." Fortey, R.A., Edgecombe, G.D. 2017 [Declivolithus titan sp. nov.] An Upper Ordovician (Katian) Trilobite Fauna from the Lower Ktaoua Formation, Morocco. Czech Geological Survey, Bulletin of Geosciences, 92(3):311-322 PDF LINK Pereira, S., Rábano, I., Gutiérrez-Marco, J.C. 2024 The Trilobite Assemblage of the Declivolithus Fauna (Lower Katian, Ordovician) of Morocco: A Review with New Data. Journal of Paleontology, (ahead-of-print publication – in press) 34 pp. PDF LINK -
Very RARE 100%Natural Declivolithus Trilobite Fossil a.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Declivolithus alfredi Trilobite SITE LOCATION: Ourzazate, Morocco TIME PERIOD: Ordovician Era (443 to 485 million years ago) Here is a FAINT VERY RARE and absolutely 100% natural Declivolithus cf. alfredi Trilobite Fossil specimen that was found near Ourzazate, Morocco. Trinucleidae is a family of small to average size asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that period. It contains approximately 227 species divided over 51 genera in 5 subfamilies. Trinucleidae is an extinct family of fast-moving low-level epifaunal suspension feeders. Description of the Family: Cephalic fringe broad, sloping outward, with numerous pits on external surfaces. Occipital ring convex. Thorax with six segments,deep apodemal pits in articulating furrows. Pygidium triangular, length 0.25 to 0.5 of width; axis with many rings; pleural fields with shallow pleural furrows. Glabella and genae may have articulate pattern of raised edges. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Asaphida Family: †Trinucleidae Genus: †Declivolithus Species: †alfredi-
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Very RARE 100%Natural Declivolithus Trilobite Fossil a.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Declivolithus alfredi Trilobite SITE LOCATION: Ourzazate, Morocco TIME PERIOD: Ordovician Era (443 to 485 million years ago) Here is a FAINT VERY RARE and absolutely 100% natural Declivolithus cf. alfredi Trilobite Fossil specimen that was found near Ourzazate, Morocco. Trinucleidae is a family of small to average size asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that period. It contains approximately 227 species divided over 51 genera in 5 subfamilies. Trinucleidae is an extinct family of fast-moving low-level epifaunal suspension feeders. Description of the Family: Cephalic fringe broad, sloping outward, with numerous pits on external surfaces. Occipital ring convex. Thorax with six segments,deep apodemal pits in articulating furrows. Pygidium triangular, length 0.25 to 0.5 of width; axis with many rings; pleural fields with shallow pleural furrows. Glabella and genae may have articulate pattern of raised edges. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Asaphida Family: †Trinucleidae Genus: †Declivolithus Species: †alfredi-
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- declivolithus alfredi
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Very RARE 100%Natural Declivolithus Trilobite Fossil a.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Declivolithus alfredi Trilobite SITE LOCATION: Ourzazate, Morocco TIME PERIOD: Ordovician Era (443 to 485 million years ago) Here is a FAINT VERY RARE and absolutely 100% natural Declivolithus cf. alfredi Trilobite Fossil specimen that was found near Ourzazate, Morocco. Trinucleidae is a family of small to average size asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that period. It contains approximately 227 species divided over 51 genera in 5 subfamilies. Trinucleidae is an extinct family of fast-moving low-level epifaunal suspension feeders. Description of the Family: Cephalic fringe broad, sloping outward, with numerous pits on external surfaces. Occipital ring convex. Thorax with six segments,deep apodemal pits in articulating furrows. Pygidium triangular, length 0.25 to 0.5 of width; axis with many rings; pleural fields with shallow pleural furrows. Glabella and genae may have articulate pattern of raised edges. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Asaphida Family: †Trinucleidae Genus: †Declivolithus Species: †alfredi-
- declivolithus alfredi
- ordovician
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Very RARE 100%Natural Declivolithus Trilobite Fossil a.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Declivolithus alfredi Trilobite SITE LOCATION: Ourzazate, Morocco TIME PERIOD: Ordovician Era (443 to 485 million years ago) Here is a FAINT VERY RARE and absolutely 100% natural Declivolithus cf. alfredi Trilobite Fossil specimen that was found near Ourzazate, Morocco. Trinucleidae is a family of small to average size asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that period. It contains approximately 227 species divided over 51 genera in 5 subfamilies. Trinucleidae is an extinct family of fast-moving low-level epifaunal suspension feeders. Description of the Family: Cephalic fringe broad, sloping outward, with numerous pits on external surfaces. Occipital ring convex. Thorax with six segments,deep apodemal pits in articulating furrows. Pygidium triangular, length 0.25 to 0.5 of width; axis with many rings; pleural fields with shallow pleural furrows. Glabella and genae may have articulate pattern of raised edges. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Asaphida Family: †Trinucleidae Genus: †Declivolithus Species: †alfredi-
- declivolithus alfredi
- ordovician
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