The Caribbean Spiny Lobster (Panulirus argus) has an antennular plate with 4 large spines arranged in a square; there are no scattered small spinules. The third maxilliped has an exopod with a flagellum. The transverse grooves of the abdominal somites have margins that are straight, not crenulated, where interrupted, they gradually narrow toward the middle of the body, rather than end abruptly. The color of the abdominal somites is reddish, brownish, or sometimes greenish, without transverse colour bands. A large eyespot of whitish or yellowish, surrounded by a dark colour, is present over the anterior end of the base of the pleura of abdominal somite 2; a similar (even slightly larger) spot is present on the anterolateral parts of somite 6. The tail fan has a broad transverse reddish band along or just before the posterior margin. (Holthuis 1991)
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