| Euplana | |
|---|---|
 | |
| Euplana gracilis | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Platyhelminthes |
| Order: | Polycladida |
| Family: | Euplanidae |
| Genus: | Euplana Girard, 1893 |
| Synonyms | |
ConjuguterusPearse, 1938 | |
Euplana is a genus of flatworm belonging to the family Euplanidae. [1]
Members of Euplana are defined by being somewhat elongated in shape. Members lack a prostatic vesicle, and the genital pores are close together. Tentacles are lacking, and unlike others in the family Euplanidae, the penis is not armed with any sort of stylet, being small or even absent. Species may or may not have a Lang's vesicle. [2]
There are currently four species accepted in Euplana: [1]
The Phrynosomatidae are a diverse family of lizards, sometimes classified as a subfamily (Phrynosomatinae), found from Panama to the extreme south of Canada. Many members of the group are adapted to life in hot, sandy deserts, although the spiny lizards prefer rocky deserts or even relatively moist forest edges, and the short-horned lizard lives in prairie or sagebrush environments. The group includes both egg-laying and viviparous species, with the latter being more common in species living at high elevations.
Balanoglossus is a genus of ocean-dwelling acorn worms (Enteropneusta). It has zoological importance because, being hemichordates, they are an "evolutionary link" between invertebrates and vertebrates. Balanoglossus is a deuterostome, and resembles the sea squirts (Ascidiacea) in that it possesses branchial openings, or "gill slits". It has a notochord in the upper part of the body and has no nerve chord. It does have a stomochord, however, which is a gut chord within the collar. Their heads may be as small as per 2.5 mm (1/10 in) or as large as 5 mm (1/5 in).
The Natricinae are a subfamily of colubroid snakes, sometimes referred to as a family (Natricidae). The subfamily comprises 36 genera. Members include many very common snake species, such as the European grass snakes, and the North American water snakes and garter snakes. Some Old World members of the subfamily are known as keelbacks, because their dorsal scales exhibit strong keeling.
Dugesia is a genus of dugesiid triclads that contains some common representatives of the class Turbellaria. These common flatworms are found in freshwater habitats of Africa, Eurasia, and Australia. Dugesia is best known to non-specialists because of its regeneration capacities.
Ascoviridae is a family of double strand DNA viruses that infect primarily invertebrates, mainly noctuids and spodoptera species; it contains two genera, Ascovirus, which contains three species, and Toursvirus with a single species Diadromus pulchellus toursvirus.
Amoeba is a genus of single-celled amoeboids in the family Amoebidae. The type species of the genus is Amoeba proteus, a common freshwater organism, widely studied in classrooms and laboratories.
Polarella is a dinoflagellate, and is the only extant genus of the Suessiaceae family. The genus was described in 1999 by Marina Montresor, Gabriele Procaccini, and Diane K. Stoecker, and contains only one species, Polarella glacialis. Polarella inhabits channels within ice formations in both the Arctic and Antarctic polar regions, where it plays an important role as a primary producer. Polarella is a thecate dinoflagellate, wherein the cell has an outer covering of cellulose plates, which are arranged in nine latitudinal series. The general morphology of Polarella is similar to that of a typical dinoflagellate. and Polarella has a zygotic life history, wherein it alternates between a motile vegetative phase and a non-motile spiny cyst. While it is thought that the cysts of Polarella have lost their ability to form fossils, the cyst life cycle stage has acted as link to extinct members of the Suessiaceae family.
Leuciscinae is a subfamily of the freshwater fish family Cyprinidae, which contains the true minnows.
Pseudoceros ferrugineus, the Fuchsia flatworm, is a marine flatworm species that belongs to the Pseudocerotidae family.
Phagocata is a genus of planariid triclad.
Acotylea is a suborder of free-living marine turbellarian flatworms in the order Polycladida.
Notogynaphallia is a genus of land planarians from South America.
Bonelliidae is a family of marine worms noted for being sexually dimorphic, with males being tiny in comparison with the females. They occupy burrows in the seabed in many parts of the world's oceans, often at great depths.
Euplanidae is a family of flatworms belonging to the order Polycladida.
Aprostatum is a genus of flatworms belonging to the family Euplanidae.
Aprostatum clippertoni is a species of flatworm belonging to the family Euplanidae. It is found in the Northern Pacific Ocean.
Euplana carolinensis is a species of flatworm belonging to the family Euplanidae. It is found within the United States in North Carolina.
Euplana claridade is a species of flatworm belonging to the family Euplanidae. It is found within Cape Verde.
Euplana gracilis is a species of marine flatworm belonging to the family Euplanidae. It is found within the United States.
Namyhplana is a genus of marine flatworm belonging to the family Euplanidae. It is monotypic, containing the sole species Namyhplana henriettae. It is found within Chile.
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