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Pestarella Whitei
''Pestarella'' is a genus of thalassinidean crustacean erected in 2003 from former members of the genus ''Callianassa''. It is distinguished from ''Callianassa'' by the rounded, rather than squarish telson, and by the absence of the first two pleopods in males. The genus contains the following species: *'' Pestarella candida'' (Olivi, 1792) *'' Pestarella convexa'' (de Saint Laurent & Le Loeuff, 1979) *'' Pestarella rotundicaudata'' (Stebbing, 1902) *''Pestarella tyrrhena ''Gilvossius tyrrhenus'' (formerly ''Pestarella tyrrhena'') is a species of thalassinidean crustacean (''ghost shrimp'' or ''mud shrimp'') which grows to a length of . It lives in burrows in shallow sandy parts of the sea-bed in the Mediterranean ...'' (Petagna, 1792) *'' Pestarella whitei'' (Sakai, 1999) References Thalassinidea {{decapod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pestarella Tyrrhena
''Gilvossius tyrrhenus'' (formerly ''Pestarella tyrrhena'') is a species of thalassinidean crustacean (''ghost shrimp'' or ''mud shrimp'') which grows to a length of . It lives in burrows in shallow sandy parts of the sea-bed in the Mediterranean Sea and northern Atlantic Ocean. It is the most common thalassinidean in the Mediterranean, and has been used as bait by fishermen for at least 200 years. Description ''G. tyrrhenus'' is a small crustacean, up to long, with a soft exoskeleton apart from two large, unequal claws. It is whitish or greenish-grey, with pink or blue spots. Because of its burrowing lifestyle, ''G. tyrrhenus'' has small eyes on short stalks, and its maxillipeds can form an operculum; the telson is very short, and the rostrum is almost entirely absent. Larval development is rapid and involves few stages. Eggs hatch into a zoeal stage, which is followed by a second zoea and then a megalopa stage before adulthood. This rapid development allows the larvae to se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callianassa (genus)
''Callianassa'' is a genus of mud shrimps, in the family Callianassidae. Three of the species in this genus ('' C. candida'', '' C. tyrrhena'' and '' C. whitei'') have been split off into a new genus, '' Pestarella'', while others such as '' Callianassa filholi'' have been moved to '' Biffarius''. Species Forty-six species are currently recognised in the genus ''Callianassa'': *'' Callianassa acutirostella'' Sakai, 1988 *'' Callianassa affinis'' A. Milne-Edwards, 1861 *''Callianassa amplimaxilla'' Sakai, 2002 *'' Callianassa anoploura'' Sakai, 2002 *'' Callianassa aqabaensis'' Dworschak, 2003 *'' Callianassa australis'' Kensley, 1974 *''Callianassa bangensis'' Sakai, 2005 *''Callianassa batei'' Woodward, 1869 *''Callianassa brachytelson'' Sakai, 2002 *''Callianassa brevirostris'' Sakai, 2002 *''Callianassa chakratongae'' Sakai, 2002 *''Callianassa contipes'' Sakai, 2002 *''Callianassa costaricensis'' Sakai, 2005 *''Callianassa diaphora'' Le Loeuff & Intes, 1974 *''Callianassa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pestarella Rotundicaudata
''Pestarella'' is a genus of thalassinidean crustacean erected in 2003 from former members of the genus ''Callianassa''. It is distinguished from ''Callianassa'' by the rounded, rather than squarish telson, and by the absence of the first two pleopods in males. The genus contains the following species: *''Pestarella candida'' (Olivi, 1792) *'' Pestarella convexa'' (de Saint Laurent & Le Loeuff, 1979) *'' Pestarella rotundicaudata'' (Stebbing, 1902) *''Pestarella tyrrhena'' (Petagna, 1792) *''Pestarella whitei ''Pestarella'' is a genus of thalassinidean crustacean erected in 2003 from former members of the genus ''Callianassa''. It is distinguished from ''Callianassa'' by the rounded, rather than squarish telson, and by the absence of the first two ple ...'' (Sakai, 1999) References Thalassinidea {{decapod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pestarella Convexa
''Pestarella'' is a genus of thalassinidean crustacean erected in 2003 from former members of the genus ''Callianassa''. It is distinguished from ''Callianassa'' by the rounded, rather than squarish telson, and by the absence of the first two pleopods in males. The genus contains the following species: *''Pestarella candida'' (Olivi, 1792) *'' Pestarella convexa'' (de Saint Laurent & Le Loeuff, 1979) *''Pestarella rotundicaudata'' (Stebbing, 1902) *''Pestarella tyrrhena'' (Petagna, 1792) *''Pestarella whitei ''Pestarella'' is a genus of thalassinidean crustacean erected in 2003 from former members of the genus ''Callianassa''. It is distinguished from ''Callianassa'' by the rounded, rather than squarish telson, and by the absence of the first two ple ...'' (Sakai, 1999) References Thalassinidea {{decapod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pestarella Candida
''Pestarella'' is a genus of thalassinidean crustacean erected in 2003 from former members of the genus ''Callianassa''. It is distinguished from ''Callianassa'' by the rounded, rather than squarish telson, and by the absence of the first two pleopods in males. The genus contains the following species: *'' Pestarella candida'' (Olivi, 1792) *'' Pestarella convexa'' (de Saint Laurent & Le Loeuff, 1979) *'' Pestarella rotundicaudata'' (Stebbing, 1902) *''Pestarella tyrrhena'' (Petagna, 1792) *''Pestarella whitei ''Pestarella'' is a genus of thalassinidean crustacean erected in 2003 from former members of the genus ''Callianassa''. It is distinguished from ''Callianassa'' by the rounded, rather than squarish telson, and by the absence of the first two ple ...'' (Sakai, 1999) References Thalassinidea {{decapod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Register Of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialists on each group of organism. These taxonomists control the quality of the information, which is gathered from the primary scientific literature as well as from some external regional and taxon-specific databases. WoRMS maintains valid names of all marine organisms, but also provides information on synonyms and invalid names. It is an ongoing task to maintain the registry, since new species are constantly being discovered and described by scientists; in addition, the nomenclature and taxonomy of existing species is often corrected or changed as new research is constantly being published. Subsets of WoRMS content are made available, and can have separate badging and their own home/launch pages, as "subregisters", such as the ''World List of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleopod
The decapod ( crustaceans such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon (abdomen). Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail: Cephalothorax Head # antennules # antennae #mandibles # first maxillae # second maxillae The head also bears the (usually stalked) compound eyes. The distal portion of a mandible or maxilla which has a sensory function is known as a palp. Thorax / pereon #first maxillipeds #second maxillipeds #third maxillipeds #first pereiopods #second pereiopods #third pereiopods #fourth pereiopods #fifth pereiopods Maxillipeds are appendages modified to function as mouthparts. Particularly in the less advanced decapods, these can be very similar to the pereiopods. Pereiopods are primarily walking legs and are also used for gathering food. They are also the ten legs from which decapo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telson
The telson () is the posterior-most division of the body of an arthropod. Depending on the definition, the telson is either considered to be the final segment of the arthropod body, or an additional division that is not a true segment on account of not arising in the embryo from teloblast areas as other segments. It never carries any appendages, but a forked "tail" called the caudal furca may be present. The shape and composition of the telson differs between arthropod groups. Crustaceans In lobsters, shrimp and other decapods, the telson, along with the uropods, forms the tail fan. This is used as a paddle in the caridoid escape reaction ("lobstering"), whereby an alarmed animal rapidly flexes its tail, causing it to dart backwards. Krill can reach speeds of over 60 cm per second by this means. The trigger time to optical stimulus is, in spite of the low temperatures, only 55 milliseconds. In the Isopoda and Tanaidacea (superorder Peracarida), the last abdominal b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoosystema
''Zoosystema'' is a peer-reviewed scientific journal published by the National Museum of Natural History, France (''Muséum national d'histoire naturelle''), covering research in animal biodiversity. Specific subjects within the journal's scope include comparative, functional and evolutionary morphology, phylogeny, biogeography, taxonomy and nomenclature, among others. Zoosystema publishes articles in English and French. Indexing The journal is abstracted and indexed by Current Contents, Biological Abstracts, ASFA (Aquatic Sciences and Fisheries Abstracts), Pascal, Zoological Record, Journal Citation Index Expanded (SciSearch®) and Scopus Scopus is Elsevier's abstract and citation database launched in 2004. Scopus covers nearly 36,377 titles (22,794 active titles and 13,583 inactive titles) from approximately 11,678 publishers, of which 34,346 are peer-reviewed journals in top-l .... References {{reflist Zoology journals Animal science journals Open access journals Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacean
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thalassinidea
Thalassinidea is a former infraorder of decapod crustaceans that live in burrows in muddy bottoms of the world's oceans. In Australian English, the littoral thalassinidean ''Trypaea australiensis'' is referred to as the ''yabby'' (a term which also refers to freshwater crayfish of the genus ''Cherax''), frequently used as bait for estuarine fishing; elsewhere, however, they are poorly known, and as such have few vernacular names, "mud lobster" and "ghost shrimp" counting among them. The burrows made by thalassinideans are frequently preserved, and the fossil record of thalassinideans reaches back to the late Jurassic. The group was abandoned when it became clear that it represented two separate lineages, now both recognised as infraorders: Gebiidea and Axiidea. Recent molecular analyses have shown that thalassinideans are most closely related to Brachyura (crabs) and Anomura (hermit crabs and their allies). There are believed to be 556 extant species of thalassinideans in 96 gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
