Can you please tell me if the spider in the attached picture is a Brown...

Asked March 15, 2018, 2:46 PM EDT

Can you please tell me if the spider in the attached picture is a Brown Recluse. It's still in the jar, if you'd like a physical specimen. I could try to get a better picture, too.

Franklin County Ohio

1 Response

Appearance The brown recluse is part of the Loxosceles genus of spiders. Members of this group have violin-shaped markings on the top of their cephalothorax (fused head and thorax) and may be informally referred to as fiddleback or violin spiders, according to The Ohio State University Extension Entomology Department. The brown recluse's violin marking can vary in intensity depending on the age of the spider, with mature spiders typically having dark violin shapes, according to The Ohio State University. The violin shape points toward the spider's bulbous abdomen. The violin shape is easy to misinterpret, so it is best to look at the eyes when determining if a spider is a brown recluse. The recluse's eyes are one of its most distinctive physical characteristics. "They have six eyes, instead of eight like most spiders," said entomologist Christy Bills, invertebrate collections manager at the Natural History Museum of Utah. Other types of spiders have eight eyes arranged in rows of four. Recluses, however, have six equal-size eyes arranged in three pairs, called dyads, in a semicircle around the front of the cephalothorax. Another distinguishing characteristic of the brown recluse spider is its uniformly colored abdomen (though the shade of brown varies from spider to spider) covered in fine hairs, which give it a velvety appearance. Their long, thin legs are also covered in fine hairs. According to the Integrated Pest Management Program at The University of California, Berkeley, the scientific name Loxosceles means "slanted legs," and refers to the fact that recluse spiders hold their legs in a slanting position when at rest. Bills also noted that the brown recluse's legs do not have spines, only fine hairs. Ohio State University reports that the brown recluse is typically about three-eighths of an inch long and about three-sixteenths of an inch wide (about 1 centimeter long and half a centimeter wide), with males being slightly smaller than females but possessing longer legs. Although this spider may be found in Ohio it is found along the south west edge of the state. It is unlikely to find this spider in Franklin county. By your current picture it is difficult to determine a distinct fiddle shape on the cephalothorax also measurements cannot be done to determine its size. Should you have further question I suggest you contact your Franklin County OSU extension, 530 W Spring St Suite 275, Columbus, OH 43215, phone 614-866-6900. They will be able to do close entomology study of your spider.