Anderella

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Anderella is an ancient chelicerate arthropod known from the Carboniferous period, with fossils found in Montana, United States. It belongs to a group called synziphosurines, and the only described species is Anderella parva.

As of 2020, Anderella parva is the youngest and the only Carboniferous synziphosurine described. Some evidence of limbs has been found, but the details are unclear because the fossils are not well preserved.

Body features include a broad, oval carapace (the front part of the body) that is slightly longer than the rear section (the opisthosoma), which has about 10 segments. A row of small nodes runs along the segments of the abdomen. The last three tail segments are longer and lack side extensions.

Anderella was named in 2007 by Moore, McKenzie, and Lieberman and is placed within Prosomapoda, a group of early chelicerates.