A taxon (plural taxa) is an element of a taxonomy, e.g. in the scientific classification in biology. Taxa form a hierarchical scheme, each being broken down into subtaxa.
In traditional Linnaean taxonomy, taxa are ranked as follows:
The prefix super- indicates a rank above another, the prefix sub- indicates a rank below another, and the prefix infra- indicates a rank below sub-. For instance:
- Superclass
- Class
- Subclass
- Infraclass
It has become generally accepted that taxa should contain an ancestral form and all or some of its descendants, though the validity of the latter category is increasingly debated.
External link
- Rules of Biocode 1997 (http://www.rom.on.ca/biodiversity/biocode/biocode1997.html)
Common misspelling and questions (FAQ)
axa txa taa tax atxa txaa taax tax ttaxa taaxa taxxa taxaa 5axa raxa faxa 6axa gaxa 6axa yaxa gaxa tqxa twxa tzxa twxa tsxa tzxa tasa taza tada tada taca taxq taxw taxz taxw taxs taxz yaxa tyaxa taxasMATER CHRISTIANORUM, ORA PRO NOBIS! When my heart is full of care, From heaven's promises and prayer; Of affliction's stormy sea, In that hour, oh! pray for me! When life's pulses high are bounding And when in mine ears are sounding When the whirl of giddy pleasure And I slight my heavenly treasure, Lures my listening soul to sin, Strives my vain, weak heart to win; If I call not then on thee-- Tender Mother, pray for me! If, in some unguarded hour Evil thoughts, with serpent power Ah! while I from bonds unholy, Mary, pure and meek and lowly, In the solemn hour of prayer-- I forget all worldly care; My vex'd spirit have left free-- Still, sweet Mary, pray for me! And in that supremest hour, When earth's scenes and pomps and power When I on the shore am lying Then, O Refuge of the dying, THE MAGDALEN AT THE MADONNA'S SHRINE. From sin's dark stain ever free, I come--I come to thee! Yet my tresses twined among; From the idle jest and song. See! I tear away the flowers Closely tended in past hours Never more for me they blossom, On my arms or brow or bosom, Thus to seek thy sacred shrine, Wretched--hopeless--should be mine? .