Trigonotarbida - Wikipedia
They ranged in size from a few millimetres to a few centimetres in body length and had segmented abdomens (opisthosoma), with the dorsal exoskeleton (tergites) across the backs of the animals' abdomens, which were characteristically divided into three or five separate plates. [1] .
Trigonotarbus johnsoni Pocock, 1911, revealed by X-ray computed ...
2014年8月28日 · Trigonotarbids also vary greatly in size, from only a few millimetres to over 50 mm in length (Fig. 1; Rößler & Dunlop, 1997; Fayers, Dunlop & Trewin, 2005). It is this variation that will be utilized in the first formal cladistic analysis of the group presented herein.
Trigonotarbid arachnids | School of Geosciences | The University of ...
The Rhynie 'trigs' are generally quite small in size. The most commonly encountered species (Palaeocharinus rhyniensis and P. hornei ) have a body length of up to 4 mm. Palaeocharinus tuberculatus is slightly larger having a maximum body length of at least 6mm.
Trigonotarbids can easily be recognised by the dorsal division of the opisthosoma into median and lateral plates. In most cases, the tergites are divided into three distinct sclerites, but in the family Anthraco-martidae there are five, a convincing synapomorphy of the numerous anthracomartid genera. Indeed, anthracom-
First trigonotarbid arachnids from the Pennsylvanian of Indiana …
2022年4月25日 · The ancient arachnid order Trigonotarbida, recognized from the late Silurian (Dunlop, Reference Dunlop 1996) to early Permian (Dunlop and Rößler, Reference Dunlop and Rößler 2013) (ca. 419–290 Ma), represents some of the earliest terrestrial fauna (Garwood and Dunlop, Reference Garwood and Dunlop 2010).
Trigonotarbus johnsoni - Oxford Academic
2014年8月28日 · Trigonotarbids are a group of Palaeozoic arachnids, best known from Coal Measures sites in Europe and North America. Here, we review previous work on their higher systematics and redescribe Trigonotarbus johnsoni Pocock, 1911, from the Coseley Lagerstätte, UK, on the basis of both hand specimens and X-ray microtomography reconstruction.
The body size of Trigonotarbids ranges from 4mm to 20mm. Despite the fact that these were major predators, their size was actually very small [A]. Geographic/Geological Range (2) Flat Body Plan - The trigonotarbids’ wide, flat bodies indicate that they likely lived in crevasses underneath rocks and deadfall.
Trigonotarbus johnsoni Pocock, 1911, revealed by X-ray …
2014年9月1日 · Trigonotarbids are a group of Palaeozoic arachnids, best known from Coal Measures sites in Europe and North America. Here, we review previous work on their higher systematics and redescribe...
Trigonotarbid arachnids from the Lower Devonian (Lower
2010年3月26日 · The extinct Trigonotarbida are superficially spider-like arachnids that ranged from the Upper Silurian (Jeram et al. 1990; Dunlop 1996a) to the Lower Permian (Müller 1957; Rössler 1998). Their most conspicuous morphological feature is a strong dorsal armament comprising up to nine longitudinally divided tergites on the opisthosoma (e.g ...
Trigonotarbids are a group of extinct arachnids - eight-legged bugs like spiders, scorpions and friends - that inhabited the Earth’s earliest terrestrial ecosystems. In fact, they were some of the land’s first apex predators! Come take a look at these fascinating creepy-crawlies.