First cytochemical study of haemocytes from the crab Carcinus aestuarii (Crustacea, Decapoda)

First cytochemical study of haemocytes from the crab Carcinus aestuarii (Crustacea, Decapoda)

For the first time, a morphological study of haemocytes from the crab Carcinus aestuarii was carried out by means of light microscopy and differing cytochemical assays. Analysis of haemocyte size frequency distribution (performed by means of a Coulter Counter) revealed the presence of two distinct haemocyte fractions in C. aestuarii haemolymph, depending on cell size. The first fraction was of ...

Ontogeny of osmoregulatory structures and functions in the green crab Carcinus maenas (Crustacea, Decapoda).

The ontogeny of osmoregulation, the development of branchial transporting epithelia and the expression of the enzyme Na+/K+-ATPase were studied in Carcinus maenas (L.) obtained from the North Sea, Germany. Laboratory-reared zoea larvae, megalopae and young crabs were exposed to a wide range of salinities, and hemolymph osmolality was measured after 24 h exposure time (72 h in juveniles). Zoea I...

A puzzling frog crab \(Crustacea: Decapoda: Brachyura\) from the Early Cretaceous Santana Group of Brazil: frog first or crab first?

The evolutionary origin of frog crabs (Raninoida) remains puzzling partly due to their astonishing morphological disparity, ranging from broad and heavily ornamented ‘crab-like’ extinct families (necrocarcinids and allies), to elongate and smoother ‘frog-like’ extant ones (raninids and allies). However, an ancient Cretaceous clade (Palaeocorystidae) displays a combination of plesiomorphic and a...

a subtidal porcellanid crab, petrolisthes militaris (heller, 1862) (crustacea: decapoda: anomura), from the persian gulf, iran

the family porcellanidae is a group of crab-shaped anomurans and there are a series of studies on this group in the persian gulf. the first report of porcellanid crabs from the persian gulf was by heller (1861); who referred incidentally to two species of this group in a discussion of crustacea of the red sea.

Short Communication:A subtidal porcellanid crab, Petrolisthes militaris (Heller, 1862) (Crustacea: Decapoda: Anomura), from the Persian Gulf, Iran