Field Guide

Land Invertebrates

Showing 1 - 10 of 33 results
Media
image of Antlion Larva on rock
Species Types
Scientific Name
More than 100 species in North America north of Mexico
Description
Antlions, also called doodlebugs, are most familiar in their immature stages, when they create pits in sand in which to trap ants. The adults look something like drab damselflies.
Media
Photo of a female arabesque orbweaver spider
Species Types
Scientific Name
Neoscona arabesca
Description
The arabesque orbweaver is a common orb-weaving spider in Missouri. The coloration is quite variable, but the slanting dark marks on the abdomen help to identify it.
Media
Photo of an armored harvestman walking on the ground
Species Types
Scientific Name
Members of suborder Laniatores
Description
Armored harvestmen have spines on their fingerlike mouthparts (pedipalps). Unlike other harvestmen, members of this suborder of so-called daddy longlegs do not usually have long legs.
Media
Photo of a triangle orbweaver, or arrowhead spider
Species Types
Scientific Name
Verrucosa arenata
Description
In late summer and fall, woodland hikers can count on walking into the arrowhead spider's web. These webs are delicate circles that help the spider snare tiny flying insects.
Media
Photo of a female scorpionfly perched on a leaf.
Species Types
Scientific Name
Panorpa spp.
Description
Male scorpionflies will make you look twice, because the abdomen is tipped with what looks like a scorpion stinger! These nifty insects cannot sting, however.
Media
Photo of a Harvestman, viewed from above
Species Types
Scientific Name
About 6,500 species have been named so far, worldwide.
Description
Daddy longlegs, or harvestmen, are familiar Missouri animals. They are not spiders, but opilionids. Unlike spiders, they have a fused body form and lack silk and venom glands.
Media
Photo of a dark fishing spider standing on a rubber tire.
Species Types
Scientific Name
Dolomedes tenebrosus
Description
The dark fishing spider often evokes alarm because of its large size. This mottled black and brown spider is often misidentified. It is not always found near permanent water.
Media
Photo of a dotted wolf spider
Species Types
Scientific Name
Rabidosa punctulata
Description
The dotted wolf spider has a solid brown stripe running down the middle of the abdomen, seen from above. Like other wolf spiders, females have strong maternal instincts, carrying their spiderlings around on their back until they can be on their own.
Media
filmy dome spider
Species Types
Scientific Name
Neriene radiata (formerly Prolinyphia marginata)
Description
The filmy dome spider is one of the most abundant woodland spiders in Missouri. Although the spider is tiny, its snare web, which looks like an upside-down silk bowl, is conspicuous throughout the year.
Media
Photo of a green crab spider on a leaf
Species Types
Scientific Name
Mecaphesa spp. and Misumessus spp.
Description
The more obvious differences between foliage crab spiders and other flower crab spiders is that these generally are smaller, and their carapaces, abdomens, and legs are spiny.
See Also
Media
Photo of a Yellow-Collared Scape Moth
Species Types
Scientific Name
Cisseps fulvicollis
Description
The yellow-collared scape moth is more often “orange-collared.” And whether you think it looks more like a firefly or a wasp, it’s still a moth!
Media
image of Plume Moth on blade of grass
Species Types
Scientific Name
Nearly 150 species in North America north of Mexico
Description
Slim, delicate plume moths are instantly recognizable by their T-shaped silhouette, long legs, and muted shades of tan and brown. It can be hard to separate the various species.
Media
Photo of an Isabella Tiger Moth
Species Types
Scientific Name
Pyrrharctia isabella
Description
Not many people know the adult Isabella tiger moth when they see one, but we’re all acquainted with its caterpillar, the woolly worm, or woolly bear.

About Land Invertebrates in Missouri

Invertebrates are animals without backbones, including earthworms, slugs, snails, and arthropods. Arthropods—invertebrates with “jointed legs” — are a group of invertebrates that includes crayfish, shrimp, millipedes, centipedes, mites, spiders, and insects. There may be as many as 10 million species of insects alive on earth today, and they probably constitute more than 90 percent all animal species.