Loxosceles blanda

Gertsch & Ennik, 1983

Big Bend Recluse

Loxosceles blanda, commonly known as the Big Bend recluse, is a of recluse spider in the Sicariidae. It was described in 1983 by Gertsch and Ennik. The species is native to the United States, with its suggesting association with the Big Bend region of Texas. Like other members of the Loxosceles, it possesses cytotoxic venom that can cause tissue in humans, though documented cases specific to this species are limited.

Loxosceles blanda by Sam Kieschnick. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Loxosceles blanda: /lɒkˈsɒsəliːz ˈblændə/

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Identification

As a Loxosceles , L. blanda can be distinguished from most other spiders by its six arranged in three pairs (dyads) forming a U-shaped pattern on the . The and lateral pairs are nearly contiguous, while the pair is more widely separated. Many Loxosceles species, including some of L. blanda, display a dark violin-shaped marking on the cephalothorax, though this marking may be faint or absent. The eye pattern remains the definitive diagnostic feature. L. blanda is one of approximately eleven Loxosceles species occurring in the United States, most of which are restricted to the southwestern states and are difficult to distinguish from one another without expert examination.

Images

Distribution

United States. The "Big Bend recluse" indicates association with the Big Bend region of Texas, though precise range boundaries have not been extensively documented in the provided sources.

Human Relevance

As a recluse spider, L. blanda possesses venom containing sphingomyelinase D, which can cause —a condition involving necrotic skin in some bite victims. However, specific documentation of medically significant bites attributed to this is sparse in the available sources. Recluse spiders generally are reluctant to bite and bites typically occur only when the spider is trapped against skin. The species is frequently subject to misidentification, with many brown-colored spiders incorrectly identified as recluses.

Similar Taxa

Loxosceles reclusa (Brown Recluse)Overlaps in general appearance and pattern; L. reclusa has a more easterly distribution centered in the Midwest, while L. blanda appears restricted to the southwestern United States
Loxosceles rufescens (Mediterranean Recluse)An introduced with wider distribution; requires expert examination to distinguish from native Loxosceles species including L. blanda
Loxosceles laeta (Chilean Recluse)Another introduced with limited U.S. distribution; similar six-eyed pattern and potential for necrotic envenomation