Lochlan Scorpion

I found a scorpion while working on the dry side and brought it home for Lochlan to examine. They seem to prefer the dryer climate over wetter North Kohala and he loves his creatures.

The body of the scorpions has a chitin (polysaccharide) exoskeleton which is covered by hairs and has two parts or tagmata: the head (cephalothorax or prosoma) and the abdomen (opisthosoma).

The chelicera or mouth parts, a couple of pedipalps or claws with pincers at the end, eight legs, the tail (metasoma), a venom deposit (telson) and the stinger (Aculeus), are also pieces that make up their anatomy. Each pincer has a fixed claw and a movable claw.

Lochlan and Scorpion

The Scorpions have a very wide range of sizes. While some have a length around 0.47 inches, others have a length up to 7.8 inches as the emperor scorpion (Pandinus imperator). Similarly, their width varies according to the species. Some scorpions are thin and elongated, and others are short and wide. The Asian species Euscorpiops montanus have dimensions that look somewhat disproportionate because the size of their pedipalps is large compared to the length of the tail.

Scorpions have several eyes of which two are at the top of the prosoma, and two to five additional pairs are at both front sides. Despite their many eyes, scorpions do not have good visibility, and they are very sensitive to light. Their eyes only work to distinguish between clarity and darkness and perhaps movements, but they are believed to be useless recognizing shapes.

In contrast, their sense of smell is very well developed, and they can identify their prey, detect dangers and differentiate males from females.

Each one of its eight legs has different segments. From bottom to top, the apotele which has a pair of ungues and the dactyl, the tarsus, the basitarus, the tibia, the patella, the femur, the trochanter and the coxa. The pedipalps are composed of the coxa, trochanter, femur, patella, tibia, and tarsus.

From Scorpion Anatomy