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The Sipuncula or Sipunculida is a group containing about 162 species of bilaterally symmetrical, unsegmented marine worms. The name Sipuncula is from the genus name Sipunculus, and comes from the Latin siphunculus meaning a "small tube". Sipuncula seems to be closely related to Myzostomida, and Annelida.
Mantis shrimp, or stomatopods, are carnivorous marine crustaceans of the order Stomatopoda, branching from other members of the class Malacostraca around 340 million years ago. Mantis shrimps typically grow to around 10 cm (3.9 in) in length, while a few can reach up to 38 cm (15 in). The largest mantis shrimp ever caught had a length of 46 cm (18 in); it was caught in the Indian River near Fort Pierce, Florida, in the United States. A mantis shrimp's carapace covers only the rear part of the head and the first four segments of the thorax. Varieties range in color from shades of brown to vivid colors, with more than 450 species of mantis shrimps being known. They are among the most important predators in many shallow, tropical and subtropical marine habitats. However, despite being common, they are poorly understood, as many species spend most of their lives tucked away in burrows and holes.
The crustacean order Tanaidacea make up a minor group within the class Malacostraca. There are about 940 species in this order.
Axiidea is an infraorder of decapod crustaceans. They are colloquially known as mud shrimp, ghost shrimp, or burrowing shrimp; however, these decapods are only distantly related to true shrimp. Axiidea and Gebiidea are divergent infraoders of the former infraorder Thalassinidea. These infraorders have converged ecologically and morphologically as burrowing forms. It is now widely believed that these two infraorders represent two distinct lineages separate from one another; however, this separation occurred in 2009 based on molecular evidence. As a result, much of the literature and research surrounding these infraorders still refers to the Axiidea and Gebiidea in combination as "thalassinidean" for the sake of clarity and reference. This division based on molecular evidence is consistent with the groupings proposed by Robert Gurney in 1938 based on larval developmental stages.
Callianassidae is a family of ghost shrimp of the order Decapoda.
Gilvossius tyrrhenus is a species of thalassinidean crustacean which grows to a length of 70 mm (2.8 in). 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.
Squilla mantis is a species of mantis shrimp found in shallow coastal areas of the Mediterranean Sea and the Eastern Atlantic Ocean: it is also known as "pacchero" or "canocchia". Its abundance has led to it being the only commercially fished mantis shrimp in the Mediterranean.
Thalassina is a genus of mud lobsters found in the mangrove swamps of the Indian Ocean and western Pacific Ocean. Its nocturnal burrowing is important for the recycling of nutrients in the mangrove ecosystem, although it is sometimes considered a pest of fish and prawn farms.
Upogebia deltaura is a species of mud lobster from the Atlantic Ocean and Mediterranean Sea.
Oratosquilla oratoria is a species of mantis shrimp found in the Western Pacific. It is widely harvested in Japan where it is known as shako and eaten as sushi. Like other members of its order it has a powerful spear, which it uses to hunt invertebrates and small fish. It grows to a length of 185 millimetres (7.3 in), and lives at depths of 10–100 metres (33–328 ft).
Callianassa subterranea is a species of burrowing ghost shrimp. This species is known by such generic common names as "mud shrimp" and "ghost shrimp".
Pseudosquilla ciliata, the common mantis shrimp, is a species of mantis shrimp, known by common names including rainbow mantis shrimp and false mantis shrimp. It is widespread in the tropical Indo-Pacific region and in both the western and eastern Atlantic Ocean.
Tanymastix stagnalis is a species of Anostraca that lives in temporary pools across Europe. It may reach up to 2 cm (0.8 in) in some areas and has 11 pairs of bristly, flattened appendages. It swims upside-down and filters food particles from the water. It is the only species of Anostraca in Ireland, having been discovered in Rahasane turlough in 1974.
Sabellastarte spectabilis is a species of benthic marine polychaete worm in the Sabellidae family. It is commonly known as the feather duster worm, feather duster or fan worm. It is native to tropical waters of the Indo-Pacific but has spread to other parts of the world. It is popular in aquariums because of its distinctive appearance and its ability to remove organic particles and improve water quality.
Phoronopsis californica is a species of marine horseshoe worm in the phylum Phoronida. It was first described as a new species by William Hilton in 1930 when he found it at Balboa Bay in Newport Beach, California.
Calliapagurops is a genus of mud shrimp containing two species:
Acanthaxius is a genus of mud lobster native to the Indo-Pacific oceans. It has a slender rostrum which is longer than the eyestalks, is spinose and has seven spines and has a depth range of 228–438 metres (748–1,437 ft). It includes the following species:
Ctenocheloides is a genus of ghost shrimp in the family Callianassidae, containing the single species Ctenocheloides attenboroughi. It was described in 2010, and named in honour of the British natural history broadcaster Sir David Attenborough. It is known from a single female specimen collected in shallow water on the north-western coast of Madagascar.
Calliasmata pholidota is a shrimp of the family Hippolytidae. It is thought C. pholidota is an opportunistic feeder, taking live prey or scavenging for food.
Thalassina anomala, known as the scorpion mud lobster, is a species of crustacean in the family Thalassinidae.
References
- ↑ Michael Türkay (2010). "Calliapagurops charcoti de Saint Laurent, 1973". World Register of Marine Species . Retrieved May 6, 2011.
- 1 2 3 4 5 6 7 Peter C. Dworschak & Peter Wirtz (2010). "Discovery of the rare burrowing shrimp Calliapagurops charcoti de Saint Laurent, 1973 (Decapoda: Axiidea: Callianassidae) in shallow water: first record of the infraorder for Madeira Island" (PDF). Zootaxa . 2691: 53–56.