Harpetida


Systematics
Wikimedia Commons
Images
Wikimedia Commons
Harpetida lat - trilobite detachment Paleozoic group: found in the Cambrian, Ordovician, Silurian and Devonian periods The name of the detachment comes from the word "sickle" Harpe due to the crescent the shape of buccal horns123
Contents
1 Description
2 Systematics
3 Geochronology
4 Notes
5 Literature
6 Links
Description edit | edit code
Thorax trunk section typically consists of 12 or more segments up to 29 Cheeks extend backward in the form of crescent-shaped horns backwards cheek horns Eyes are not developed or weak The convex part of the head shield, or glabella, narrows forward and carries from 1 to 3 grooves Rounded head shield123
Harpes
Harpides
Systematicsign | edit code
About 30 clans The unit was recently Ebach & amp; McNamara, 2002, was isolated from the Ptychopariida taxon, in which he previously had the status of suborder Harpina145
Entomaspididae
Childbirth: Baikadamaspis, Entomaspis = Hypothetica
Harpetidae
Childbirth: Arraphus, Bohemoharpes = Declivoharpes; = Unguloharpes, Bowmania, Brachyhipposiderus, Conococheaguea, Dolichoharpes, Dubhglasina = Australoharpes; = Sinoharpes, Eoharpes / Harpina, Eotrinucleus, Harpes = Helioharpes; = Reticuloharpes, Heterocaryon, Hibbertia / Platyharpes; = Harpesoides; = Metaharpes; = Paraharpes; = Thorslundops; = Wegelinia, Kathrynia, Kielania = Lowtheria, Lioharpes = Fritchaspis, Paleoharpes, Scotoharpes = Aristoharpes; = Selenoharpes
Harpididae = Loganopeltidae
Childbirth: Chencunia, Dictyocephalites, Fissocephalus, Harpides, Harpidoides, Kitatella, Loganopeltis, Loganopeltoides, Metaharpides, Paraharpides, Pscemiaspis
Geochronology edit | edit code
The group appeared about 500 million years ago in the middle of the Cambrian period and completely died out at the end of the Devonian period1 - Precambrian - Phanerozoic - Aeon - Paleozoic
Mesozoic
Cenozoic
Era - Cambrian - Ordo - Wick - Seal - Ur - Devon - Carbon - Perm - Triassian - Jura
Mel
Paleo
gene - Neo - gene
P-d - 4570 - 541 - 485.4 - 443.4 - 419.2 - 358.9
298.9 - 252.2 - 201.3 - 145.0 - 66.0
23.03
million years

2,588
† Harpetida






Notes edit | edit code
↑ 1 2 3 4 ORDER LICHIDA sensu Fortey 1997 English wwwtrilobitesinfo Verified February 9, 2014
↑ 1 2 Drushchits VV Invertebrate Paleontology - Moscow: Moscow State University Publishing House, 1974 - 528 s - 3,600 copies
↑ 1 2 SM Gon III Pictorial guide to the order Harpetida January 1, 2008 Retrieved February 9, 2014
↑ Ebach, MC & amp; KJ McNamara 2002 A systematic revision of the family Harpetidae Trilobita Records of the Western Australian Museum 21: 135–167
↑ Beu, AG 1971 Cassidae and Harpidae: Two family group homynyms in Molluska and Arthropoda ZNS 1938 Bulletin of Zoological Nomenclature 28: 564-586 - Literature edit code
Jell, P A & amp; J M Adrain 2003 Available generic names for trilobites // Memoirs of the Queensland Museum 482: 331–553
Links edit | edit code
Order Harpetida Ebach and McNamara 2002 Eng Paleobiology Database paleobiodborg Checked February 9, 2014
Trilobites
Taxonomy
Squads
Agnostida Asaphida Corynexochida Harpetida Nektaspida Redlichiida Lichida Phacopida Proetida Ptychopariida
Genus
List of trilobite genera - Paleobiology - Cambrian explosion Cruziana Diplichnites Permian mass extinction Rusophycus Trilobite zone
Morphology
Exoskeleton
Tagmata
Cephalon Thorax Pygidium Axial lobe Pleural lobe
Terminology
Cranidium Effacement Enrollment Facial sutures Fixigena Gena Genal angle Glabella Gonatoparian Heteronomous Homonomous Hypostome Isopygous Librigena Macropygous Micropygous Opisthoparian Proparian Prosopon Spinosity Subisopygous
Soft body parts
Appendages Digestive tract Internal organs Musculature Antennae Eyes Sensory pits
Category: Trilobites


Harpetida

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