Cryptolithodes sitchensis, variously known as the umbrella crab, Sitka crab or turtle crab, is a species of lithodid crustacean native to coastal regions of the northeastern Pacific Ocean, ranging from Sitka, Alaska to Point Loma, California. Its carapace extends over its legs such that when it pulls in its legs, it … See more Cryptolithodes sitchensis has a half-moon shaped carapace extending over all of its eight walking legs and two chelipeds, giving them their common names of turtle crab, umbrella crab or helmet crab. The carapace can be … See more C. sitchensis can be found from southern Alaska to southern California, where they are common. They live within 18 m (59 ft) of the intertidal zone along the exposed coasts of the Pacific … See more The larvae of C. sitchensis have six tergites at the megalopal stage. Upon reaching the adult stage, the first and second abdominal segments have fused and the sixth tergite and telson are whole. C. sitchensis males and females have symmetrical … See more Natural predators of C. sitchensis include larger marine invertebrates, such as octopuses, seabirds, and marine mammals, such as See more The distinguishing characteristic between C. sitchensis and C. typicus is that the rostrum of C. sitchensis is wider distally than proximally, while the opposite is found in C. typicus. … See more C. sitchensis may be hard to spot due to its rough, rock-like exterior, but it is easily caught due to its slow movements. Found most commonly in the intertidal zone, this species feeds on coralline algae. The reason for the diverse colorations of its carapace may be … See more • Cryptolithodes expansus See more WebCryptolithodes sitchensis, variously known as the umbrella crab, Sitka crab or turtle crab, is a species of lithodid crustacean native to coastal regions of the northeastern Pacific Ocean, ranging from Sitka, Alaska to Point Loma, California. Its carapace extends over its legs such that when it pulls in its legs, it resembles a small stone.

Umbrella Crab (Cryptolithodes sitchensis) · iNaturalist

WebCryptolithodes sitchensis J.F. Brandt, 1853 Its carapace extends over its legs such that when it pulls in its legs, it resembles a small stone. This species has a half-moon shaped carapace extending over all of its eight walking legs and two chelipeds, giving them their common names of turtle crab, umbrella crab or helmet crab. WebCryptolithodes typicus Description: This lithodid crab has a carapace that spreads hugely, covering not only the thoracic segments but extending so far out that when the animal is … cipfa statistical neighbours

Category:Cryptolithodes - Wikimedia Commons

WebIts is found in exposed locations as well as more protected habitats with high currents. It hides in crevices and on rock covered with encrusting algae and animals; when the crab … WebJul 21, 2024 · Cryptolithodes typicus Brandt, 1848 Butterfly Crab intertidal to 55m caparace to 80mm wide south California to central Alaska Variable in color, carapace has more angular outline than C. sitchensis and bumps on its claws. WebA very typical example of the concealing or protective mimicry is given by the crab, Cryptolithodes whose smooth rounded form and texture and white colour very closely harmonize with the white pebbles of the beach and the true organic nature of the animal is apparent only when the animal, by accident, is turned over. cipfa statement on the role of the cfo