biology

List of danionin species

List of danionin species is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of danionin species rather than just read about it. In short: In the last few decades, many danionin species have been moved into different genera, in some cases repeatedly; similarly, some species have been synonymised with other species and even in some cases later unsynonymised, all of which has caused confusion. With a large number of recent discoveries, particularly in Myanmar in recent years, confusion has been caused.

Key takeaways

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Reference excerpt

In the last few decades, many danionin species have been moved into different genera, in some cases repeatedly; similarly, some species have been synonymised with other species and even in some cases later unsynonymised, all of which has caused confusion. With a large number of recent discoveries, particularly in Myanmar in recent years, confusion has been caused. As a result, a separate page has been created which lists all danionin species and also lists defunct species which have since been synonymised or renamed. Individual danionin species are listed below in order of genus:

Species categorised by genus

Danio The species remaining in the genus Danio comprise most of the danionins familiar to aquarists. They have two pairs of long barbels and are generally characterised by horizontal stripes (with the exception of the Panther Danio, Glowlight Danio and Black Barred Danio which have vertical bars. In size they range from 4 cm/ 1.75 in) to 15 cm/ 6 in). Frequently used common names are given for reference, but if the common name does not appear, click on it on the section above for more details.

Danio albolineatus - Pearl Danio Danio abolineatus var pulcher - Blue-Redstripe Danio Danio abolineatus var tweediei - Kedah Danio Danio choprai - Glowlight Danio Danio dangila - Moustached danio Danio dichromatus Danio feegradei - Yoma Danio Danio kerri - Blue Danio Danio kyathit var spotted - Ocelot Danio Danio kyathit var striped - Orange Finned Zebra Danio Celestichthys margaritatus - Celestial Pearl Danio formerly known as Galaxy Rasbora Danio meghalayensis - Meghalaya Danio - Danio nigrofasciatus - Spotted Danio - Danio quangbinhensis Danio roseus - Rose Danio - Danio rerio - Zebra danio Danio rerio var frankei - Leopard Danio Danio sp aff kyathit - Redfin Danio Danio sp "KP01" - Burma Zebra Danio Danio sp "TW01" - Black Barred Danio Danio sp "TW02" - Burma Danio Danio sp "TW03" - Panther Danio

Devario The Devario species comprise some danionins familiar to aquarists. Generally larger fish than Danios, they have short barbels (if present at all) and generally have deeper bodies than Danio, with species having vertical stripes present (as well as horizontal). In size, they range from 5 to 15 cm (2 to 6 in).

Devario acuticephala Devario aequipinnatus - Giant Danio Devario affinis - False Giant Danio Devario apogon Devario assamensis - Red Mirik Danio Devario annandalei - Annandale's Giant Danio Devario browni - Browns Danio Devario chrysotaeniatus Gold Striped Danio Devario devario - Bengal Danio or Sind Danio Devario interruptus Devario maetaengensis - Fire Bar Danio Devario laoensis - Laos Giant Danio Devario malabaricus - Malabar Danio Devario pathirana - Barred Danio Devario regina - Queen Danio Devario shanensis - Shan Danio Devario sondhii - Sondhi's Danio Devario strigillifer Devario sp "Broken Line" - Blue Moon Danio

Little-known Devario species Little is known about the following Devario species, but some information exists about them at the Fishbase Devario index(Fishbase: Ed. Rainer Froese and Daniel Pauly. July 2005 version)

Devario acrostomus Devario apopyris Devario fangfangae Devario fraseri - Fraser's Danio Devario gibber Devario horai Devario kakhienensis - Kakhyen Hills Danio Devario leptos Devario manipurensis Devario naganensis - Naga Hills Danio Devario neilgherriensis - Neilgherry Hills Giant Danio Devario peninsulae Devario salmonata Devario spinosus Devario suvatti Devario yuensis

Tanichthys Not strictly speaking a danionin genus, Tanichthys is widely regarded as one.

Tanichthys albonubes - White Cloud Mountain Minnow Tanichthys micagemmae - Vietnamese Cardinal Minnow

Esomus A genus comprising the flying barbs, Esomus species are closely related to the genus Danio and are distinctive for their extremely long barbels.

Esomus ahli Esomus altus Esomus barbatus - South Indian Flying Barb Esomus caudiocellatus Esomus danricus - Indian Flying Barb Esomus lineatus - Striped Flying Barb Esomus longimanus - Mekong Flying Barb Esomus malabaricus Esomus malayensis - Malayan Flying Barb Esomus manipurensis Esomus metallicus - Striped Flying Barb Esomus thermoicos

Chela Chela is a closely related genus to Devario

Chela cachius - Neon Hatchet Fish Chela caeruleostigmata - Leaping Barb Chela dadiburjori - Dadio Chela fasciata Chela laubuca - Indian Glass Barb Chela maassi

Parachela Parachela is closely related to Chela and Devario

Parachela cyanea Parachela hypophthalmus Parachela ingerkongi Parachela maculicauda Parachela oxygastroides - Glass Fish Parachela siamensis Parachela williaminae

Inlecypris A genus closely related to Devario, Inlecypris comprises two smallish barred fish from Lake Inle in Myanmar.

Inlecypris jayarami Inlecypris auropurpurea

"Miniature" danionins The following genera of tiny fish are thought to be danionins closely related to Danio and Esomus, but too little is known about them to confirm this.

Danionella Danionella comprises tiny, recently discovered fish.

Danionella mirifica Danionella translucida "Several other as yet unnamed Danionella species have very recently been discovered".

Microrasbora The genus name Microrasbora means "small Rasbora", but these fish appear to be more closely related to the Danio species than Rasbora. Speculation exists that Microrasbora erythromicron may be transferred to the genus Danio, but this now seems unlikely.

Microrasbora erythromicron Microrasbora gatesi Microrasbora kubotai Microrasbora nana Microrasbora rubescens

Paedocypris Paedocypris contains the smallest known fish in the world.

Paedocypris micromegethes Paedocypris progenetica

Sundadanio A genus with only one species, the genus Sundadanio was created after Rasbora axelrodi species was transferred to this genus. S. axelrodi resembles a tiny Rasbora.

Sundadanio axelrodi

Danionins renamed or wrongly identified These genera that previously described certain danionins are no longer valid:

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with List of danionin species

Start with the simplest possible case. Write down what List of danionin species claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of danionin species before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of danionin species ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of danionin species

In research: List of danionin species appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of danionin species in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of danionin species is common in secondary-school and first-year university syllabi. It links to neighbouring topics Danios, Fish of Southeast Asia, Fishkeeping, so understanding it makes those chapters shorter.
In everyday life: Look for List of danionin species outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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Frequently asked questions

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