Phyllocarida

Phyllocarida
	Nebalia bipes
Systematics
Empire :	Animals ( Animalia )
Trunk :	Arthropod ( arthropoda )
Sub-stem :	Crustaceans ( Crustacea )
Class :	Higher crabs (Malacostraca)
Subclass :	Phyllocarida
Scientific name
	Phyllocarida
	Packard , 1879

The Phyllocarida (German also Phyllocariden ) are a group of small, marine crustaceans . They form a subclass of the higher crustaceans (Malacostraca) and contain only one recent order, the Leptostraca .

description

Phyllocariden have a two-lobed carapace , the two halves of which are fused together on the back (dorsomedial). This laterally flattened shield covers the head, thorax and part of the abdomen . The front of the Carapy consists of a moveable rostrum . The eyes are stalked and provided with only a few light-sensitive elements (the Dahlella species , for example, is blind).

The crustaceans in this group have eight pairs of undifferentiated, leaf-shaped pereiopods , six pairs of pleopods (webbed feet), and no maxillipedas or uropods . Instead of this, they have a fork-shaped furca .

Occurrence and way of life

Phyllocarida are found in all oceans, with some species being more common. Thus Nebalia and Nebaliopsis cosmopolitans, while about Dahl Ella only in submarine hydrothermal sources of the Galapagos Islands to occur and Speonebalia only in sea caves of the Turks and Caicos Islands .

With the exception of the pelagic species Nebaliopsis , phyllocarids are benthic organisms that prefer muddy soils with a low oxygen content. They live in both the intertidal and abyssal ocean zones. A filtering diet is assumed, but they are also found in carrion .

Systematics

Subclass Phyllocarida Packard, 1879

† Order Archaeostraca
† Order Hoplostraca
† Order Canadaspidida
Order Leptostraca Claus, 1880

Individual evidence

^ Richard C. Brusca and Gary J. Brusca: Invertebrates . 2nd Edition. Sinauer Associates, Inc., Sunderland 2003, ISBN 978-0-87893-097-5 .
↑ Hessler, RR: Dahlella caldariensis, New Genus, New Species: A Leptostracan (Crustacea, Malacostraca) from Deep-sea Hydrothermal Vents. In: Journal of Crustacean Biology . tape 4 , no. 4 , 1984, pp. 655-664 .
↑ TE Bowman, J. Yager and TM Iliffe: Speonebalia cannoni, n. Gen., N. Sp., From the Caicos Islands, the first hypogean leptostracan (Nebaliacea, Nebaliidae) . In: Proceedings of the Biological Society of Washington . tape 98 , 1985, pp. 439-446 .
^ C. Brahm and SR Geiger: On the Biology of the Pelagic Crustacean Nebaliopsis typica GO Sars . In: Bulletin of the Southern California Academy of Sciences . tape 65 , 1966, pp. 41-46 .
^ PA McLaughlin: Comparative Morphology of Recent Crustacea . WH Freeman and Company, San Francisco, CA 1980.

[1] Richard C. Brusca and Gary J. Brusca: Invertebrates . 2nd Edition. Sinauer Associates, Inc., Sunderland 2003, ISBN 978-0-87893-097-5 .

[2] Hessler, RR: Dahlella caldariensis, New Genus, New Species: A Leptostracan (Crustacea, Malacostraca) from Deep-sea Hydrothermal Vents. In: Journal of Crustacean Biology . tape 4 , no. 4 , 1984, pp. 655-664 .

[3] TE Bowman, J. Yager and TM Iliffe: Speonebalia cannoni, n. Gen., N. Sp., From the Caicos Islands, the first hypogean leptostracan (Nebaliacea, Nebaliidae) . In: Proceedings of the Biological Society of Washington . tape 98 , 1985, pp. 439-446 .

[4] C. Brahm and SR Geiger: On the Biology of the Pelagic Crustacean Nebaliopsis typica GO Sars . In: Bulletin of the Southern California Academy of Sciences . tape 65 , 1966, pp. 41-46 .

[5] PA McLaughlin: Comparative Morphology of Recent Crustacea . WH Freeman and Company, San Francisco, CA 1980.