Species list, Checklist of Infraorder Araneomorphi for Arlington (Middlesex County, Massachusetts, USA)

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

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INSECTOIDGERENGDARK LIGHT

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Checklist for Infraorder Araneomorphi Smith, 1902
and region Arlington (Middlesex County, Massachusetts, USA)

Class	Arachnida Lamarck, 1801 Arachnids	4 4 4	Families Genera Species	Taxom
Subclass	Micrura Ehrenberg, 1831	3 3 2	Families Genera Species	Taxom
Infraclass	Megoperculata Börner, 1902	2 2 1	Families Genera Species	Taxom
Order	Araneae Clerck, 1757 Spider, Spiders, True Spiders	2 2 1	Families Genera Species	Taxom
Suborder	Araneomorphae Smith, 1902 True Spiders	2 2 1	Families Genera Species	Taxom
Infraorder	Araneomorphi Smith, 1902	2 2 1	Families Genera Species	Taxom

List of families for Arlington (Middlesex County Massachusetts)
2 Families width 1 Species

Dysderidae (C. L. Koch, 1837)	Dysderid spiders	1	Species	Taxom
Theridiidae Sundevall, 1833	Cobweb And Widow Spiders	0	Species	Taxom

Genera for Arlington (Middlesex County Massachusetts)
2 Genera with 1 Species

Dysdera Latreille, 1838		1	Species	Taxom
Steatoda Sundevall, 1833	False black widows	0	Species	Taxom

Species list for Arlington (Middlesex County Massachusetts)
1 Species

Dysdera crocata (Koch, 1838)

⇒ Dysdera maurusia Tord Tamerla..., 1873