Topic
Marrellomorph
About: Marrellomorph is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 16 citations. The topic is also known as: Marrellomorpha.
Papers
TL;DR: An isolated exopod in uncompressed three-dimensional “Orsten”-type preservation from the Cambrian of Australia represents a new species of Marrellomorpha, Austromarrella klausmuelleri gen. et. nov.
Abstract: An isolated exopod in uncompressed three-dimensional “Orsten”-type preservation from the Cambrian of Australia represents a new species of Marrellomorpha, Austromarrella klausmuelleri gen. et sp. nov. The exopod is composed of at least 17 annuli. Each of the proximal annuli carries a pair of lamellae: one lamella on the lateral side and one on the median side. The distal annuli bear stout spines in the corresponding position instead of lamellae, most likely representing early ontogenetic equivalents of the lamellae. The new find extends the geographical range of the taxon Marrellomorpha. Additionally, it offers a partial view into marrellomorph ontogeny. The occurrence of a marrellomorph fragment in “Orsten”-type preservation provides new palaeo-ecological insights into the possible connections between the “Orsten” biotas and other fossil Lagerstatten. Finding such connections is necessary for understanding the complex ecosystems of early Palaeozoic times.
18 citations
TL;DR: This is the first record of marrellid arthropods from Great Britain and only the fourth record from the entire Ordovician worldwide, which, given their current geographic and temporal distribution, indicates that marrellids arthropod may be more common in the fossil record than previously recognised.
Abstract: A new taxon of marrellid marrellomorph Dyrnwynia conollyi gen. et sp. nov. is described from the Middle Ordovician (middle Darriwilian, Didymograptus artus Biozone) Llanfallteg Formation of Northern Pembrokeshire, Wales, UK. This taxon, represented by a single specimen, is characterised by the possession of mediolateral spines with tightly spaced secondary cephalic spines limited to their external margins and that decrease in size towards the distal tip. This is the first record of marrellid arthropods from Great Britain and only the fourth record from the entire Ordovician worldwide, which, given their current geographic and temporal distribution, indicates that marrellid arthropods may be more common in the fossil record than previously recognised.
5 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 1 |
| 2012 | 1 |