**Core Concept**
Loxoscelism is a condition caused by the bite of a specific type of spider, characterized by necrotic lesions and systemic symptoms. The venom of this spider contains sphingomyelinase D, which causes the breakdown of sphingomyelin and leads to the release of toxic compounds.

**Why the Correct Answer is Right**
The correct answer is the Brown Recluse spider (Loxosceles reclusa), which is native to North America. The venom of the Brown Recluse spider contains sphingomyelinase D, an enzyme that breaks down sphingomyelin, leading to the formation of toxic compounds. This causes necrotic lesions, pain, and systemic symptoms in the victim. The venom also causes the formation of a characteristic necrotic lesion with a clear center and a raised border.

**Why Each Wrong Option is Incorrect**
* **Option A:** Black Widow spider - The venom of the Black Widow spider contains a neurotoxin called latrotoxin, which causes muscle cramps, abdominal pain, and respiratory distress. It does not cause necrotic lesions.
* **Option B:** Tarantula - Tarantula bites are generally harmless to humans and may cause mild symptoms such as redness and swelling. They do not cause necrotic lesions.
* **Option C:** Hobo Spider - The Hobo Spider is a type of spider that is found in the Pacific Northwest region of North America. Its venom can cause necrotic lesions, but it is not as well-studied as the Brown Recluse spider.

**Clinical Pearl / High-Yield Fact**
Loxoscelism is a medical emergency that requires prompt treatment, including wound care and systemic support. Delayed treatment can lead to severe consequences, including amputation.

**Correct Answer:** C.