rocky shores are one of the most important habitats of marine environment in coastal areas. this study was done in 2010-2011 to investigate the diversity of true crabs in intertidal rocky shores of qeshm island. samples were collected from intertidal zones during the low-tide at 5 stations. the specimens were fixed in 70% etanol and transferred to laboratory for identification. altogether, 15 c...

The fresh water crabs is significantly an important for biological role in the food webs. More than 6,700 known species of Brachyuran crabs and over 1,300 true freshwater crabs were identified along in the world. The true freshwater crabs are fully adopted for freshwater, semi-terrestrial or terrestrial appears of life and has with the ability of characterization of complete the life cycle enti...

Foraging fiddler crabs form a strict spatial relationship between their current positions and burrows, allowing them to run directly back to their burrows when startled even without visual contacts. Path integration (PI), the underlying mechanism, is a universal navigation strategy through which animals continuously integrate directions and distances of their movements. However, we report that ...

Rocky shores are one of the most important habitats of marine environment in coastal areas. This study was done in 2010-2011 to investigate the diversity of true crabs in intertidal rocky shores of Qeshm island. Samples were collected from intertidal zones during the low-tide at 5 stations. The specimens were fixed in 70% Etanol and transferred to laboratory for identification. Altogether, 15 c...

Despite the extensive fossil record of higher crabs (Eubrachyura) from Late Cretaceous and Cenozoic rocks worldwide, their Early Cretaceous occurrences are scarce and fragmentary, obscuring our understanding of their early evolution. Until now, representatives of only two families of eubrachyuran-like crabs were known from the Early Cretaceous: Componocancridae and Tepexicarcinidae fam. nov., b...

The true crabs, the Brachyura, are generally divided into two major groups: Eubrachyura or 'advanced' crabs, and Podotremata or 'primitive' crabs. The status of Podotremata is one of the most controversial issues in brachyuran systematics. The podotreme crabs, best recognised by the possession of gonopores on the coxae of the pereopods, have variously been regarded as mono-, para- or polyphylet...

Parasitology textbooks have long reported that grapsid crabs in the genus Eriocheir, commonly known as mitten crabs, are important second intermediate hosts of the Oriental Lung Fluke, Paragonimtrs westermani, along with several other crab'and crayfish species in Asia (e.g., Hegner and others 1929; Chandler and Read 196 1 ; Muller 1975; Cheng 1986; Smyth 1994). Epidemiologic reviews have specif...