Librostoma is a subclass of trilobites defined by having a natant hypostome, which is a hypostome (mineralized trilobite mouthpart) that is free from the...
11 KB (977 words) - 22:15, 19 June 2025
some species the pygidium is outlined with a flat border. The Subclass Librostoma was recently erected to encompass several related orders, including Ptychopariida...
4 KB (369 words) - 14:52, 4 October 2024
Harpetida (category Librostoma)
Ptychopariida, but were recently given their own order in 2002. The subclass Librostoma was erected in 1990 by Richard Fortey to cover the various orders originally...
5 KB (393 words) - 21:41, 15 June 2025
Proetida (category Librostoma)
Ptychopariida in some features, the proetids are included in the subclass Librostoma. Unlike the trilobites of the phacopid suborder Phacopina, whose eyes...
18 KB (1,187 words) - 02:14, 11 June 2025
and Harpetida were grouped together as order Ptychopariida; subclass Librostoma was erected in 1990 to encompass all of these orders, based on their shared...
119 KB (12,571 words) - 18:26, 21 July 2025
with the order Ptychopariida, though it is not included in the subclass Librostoma. Phacopida was one of only two trilobite orders (along with the Proetida)...
5 KB (447 words) - 01:14, 11 June 2025
Asaphida (category Librostoma)
Animalia Phylum: Arthropoda Clade: †Artiopoda Class: †Trilobita Subclass: †Librostoma Order: †Asaphida Fortey & Chatterton, 1988 Superfamilies Anomocaroidea...
5 KB (425 words) - 18:12, 28 May 2025
Trinucleioidea (category Librostoma)
Trinucleioidea is a superfamily of trilobites. Traditionally placed within the Asaphida, it is now sometimes considered its own order, Trinucleida. There...
4 KB (216 words) - 14:38, 28 May 2025
Domain: Eukaryota Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Subclass: Librostoma Order: Ptychopariida Family: Conocoryphidae Angelin, 1854...
2 KB (113 words) - 08:32, 1 June 2025
Proetoidea (category Librostoma)
Proetoidea is a superfamily of trilobites in the order Proetida. The Proetoidea are closely related to the Aulacopleuroidea. and are divided into three...
11 KB (518 words) - 12:37, 22 June 2024
Corynexochida (category Librostoma)
Corynexochida is an order of trilobite that lived from the Lower Cambrian to the Late Devonian. Like many of the other trilobite orders, Corynexochida...
12 KB (758 words) - 17:14, 10 March 2025
classification Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Subclass: Librostoma (?) Order: Phacopida Suborder: Calymenina Family: Bavarillidae Genus:...
1 KB (48 words) - 19:38, 18 November 2024
Scientific classification Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Subclass: Librostoma Order: Harpetida Family: Harpetidae Genus: Eskoharpes...
2 KB (160 words) - 22:06, 15 June 2025
classification Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Subclass: Librostoma Order: Ptychopariida Suborder: Ptychopariina Superfamily: Ptychopariacea...
5 KB (355 words) - 04:12, 16 March 2025