Species list, Checklist of Infraorder Orthosterni for Lower Cretaceous (Cretaceous)

Ants	Arachnids
Bees	Beetles
Booklice	Bugs
Bumblebees	Butterflies
Cicadas	Crane flies
Dragonflies	Earwigs
Flies	Isopods
Locusts	Mantises
Mayflies	Mosquitoes
Myriapods	Net-winged
Plant-parasitic	Scorpion flies
Termites	Wasps

Taxonomy & Distribution
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INSECTOIDGERENGDARK LIGHT

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Checklist for Infraorder Orthosterni Pocock, 1911
and region Lower Cretaceous (Cretaceous)

Class	Arachnida Lamarck, 1801 Arachnids	39 53 60	Families Genera Species	Taxom
Subclass	Dromopoda Shultz, 1990	6 6 6	Families Genera Species	Taxom
Order	Scorpiones C. L. Koch, 1837 Scorpion, Scorpions	4 4 4	Families Genera Species	Taxom
Suborder	Neoscorpionina Thorell & Lindström, 1885	4 4 4	Families Genera Species	Taxom
Infraorder	Orthosterni Pocock, 1911	4 4 4	Families Genera Species	Taxom

List of families for Lower Cretaceous
4 Families width 4 Species

Chactidae Reginald Inn..., 1893	Fatclaw scorpions	1	Species	Taxom
Archaeobuthidae Lourenço, 2001		1	Species	Taxom
Palaeoeuscorpiidae Lourenço, 2003		1	Species	Taxom
Hemiscorpiidae Pocock, 1893	Longtail rock scorpions	1	Species	Taxom

Genera for Lower Cretaceous
4 Genera with 4 Species

Araripescorpius Campos, 1986	1	Species	Taxom
Archaeobuthus Lourenço, 2001	1	Species	Taxom
Palaeoeuscorpius Lourenço, 2003	1	Species	Taxom
Protoischnurus Carvalho & L..., 2001	1	Species	Taxom

Species list for Lower Cretaceous
4 Species

Araripescorpius ligabuei ♰ Campos, 1986
Archaeobuthus estephani ♰ W. R. Lourenço, 2001
Palaeoeuscorpius gallicus ♰ W. R. Lourenço, 2003
Protoischnurus axelrodorum ♰ M. G. P. de ..., 2001

Subnodes of Orthosterni with occurrences in Lower Cretaceous

Superfamily	Buthoidea Koch, 1837	1 1 1	Family Genus Species	Taxom
Superfamily	Chactoidea Pocock, 1893	2 2 2	Families Genera Species	Taxom
Superfamily	Scorpionoidea Leach, 1815	1 1 1	Family Genus Species	Taxom