Glossary

76 terms beginning with T · showing 41–76

1. trailing edge

   The rear edge or margin of a moving body such as a fish fin.

2. trait

   Genetically determined characteristic or condition; distinguishing feature.

   Used in 52 profiles

3. translucent

   Allowing light but not detailed images to pass through; semitransparent.

   Used in 13 profiles

4. transparent

   Allowing light to pass through and clear enough that detailed images can be seen.

   Used in 69 profiles

5. transverse

   Crossing from side to side; located or lying across; orientated crosswise. Opposite of longitudinal.

   Used in 96 profiles

6. transverse scale row

   Number of scales in the diagonal row between the orgins of dorsal and anal fins in a fish specimen, excluding the lateral line scales.

   Used in 10 profiles

7. tribe

   In taxonomy, the group ranking below subfamily with a name typically ending in '-ini'.

   Used in 167 profiles

8. trickle tower

   Large filter particularly suitable for outdoor ponds and large aquaria, consisting of a series of vertically-arranged chambers filled with one or more types of media. Water is pumped to the top chamber where it is dispersed, most often using a spray bar. It then percolates down through the other chambers via gravity before being returned to the pond or aquarium.

9. tricuspid

   Having three points or cusps. Commonly used in reference to teeth of such form.

   Used in 12 profiles

10. trifurcate

    Having three forks or branches.

11. trinomen

    Combination of generic name, specific, and subspecific names which together form the name of a subspecies.

12. tripus

    The hindmost Weberian ossicle of the Weberian apparatus, touching the anterior wall of the swimbladder and connected to the intercalarium by a dense, elongate ligament.

13. triserial

    Arranged in three rows or series.

14. troglobite

    Obligate dweller of caves or underground environments.

15. troglobitic

    Dwelling underground or in caves.

    Used in 4 profiles

16. troglomorphic

    Used in reference to morphological adaptations to the cave or underground environment such as loss or reduction of pigment or eyes.

    Used in 5 profiles

17. trophic

    Of or relating to feeding and nutrition.

    Used in 1 profile

18. trophic level

    The hierarchical position of an organism within a food chain.

19. trophotaenia

    External, umbilical cord-like structure present in members of the family Goodeidae and some other fish groups responsible for transfer of nutrients between an adult female and her internally-developing young. May still be attached to fry at birth.

    Used in 4 profiles

20. tropical

    Of, relating to, or characteristic of, the tropics.

    Used in 107 profiles

21. tropics

    Either of the two parallels of latitude located around 23.3° north and south of the equator, respectively, representing the points farthest north and south at which the Sun can shine directly overhead; the regions of the earth siutated between these latitudes.

    Used in 1 profile

22. truncate

    Having a blunt, square, or even end; ending abruptly as if cut off across the base or tip. Often used in reference to caudal fin shape.

    Used in 103 profiles

23. tubercle

    A small, rounded, epidermal projection or protuberance present on the head, body, or fins of some fishes. Often developing temporarily during the spawning season and/or in males only.

    Used in 24 profiles

24. tuberculate

    Having tubercules.

    Used in 17 profiles

25. Tubifex

    Genus of aquatic annelid worms inhabiting the sediment layer in rivers, lakes and, less frequently, sewage channels. Raised commercially and sold live, frozen or freeze-dried as fish food.

    Used in 254 profiles

26. tubular

    Shaped like or having the form of a tube.

    Used in 9 profiles

27. tufa

    Soft, porous form of limestone composed of carbonate minerals and found in ambient temperature, lime-rich springs or lakes. Used as decorative material in aquaria.

28. turbid

    Used in reference to water made cloudy or opaque due to stirred-up or suspended material; muddy.

    Used in 136 profiles

29. turbidity

    Of wtaer, the quality of having sediment or other material stirred up or suspended.

    Used in 71 profiles

30. turgid

    Swollen; distended.

31. type

    Can be used to refer to any taxonomic group, the characteristics of which are used for defining related, higher or lower ranking groups. For example, the type of a nominal species is a specimen (type specimen), the type of a nominal genus is the nominal species (type species), and the type of a nominal family is the nominal genus (type genus).

    Used in 783 profiles

32. type designation

    Determination and selection of the type of a taxon.

33. type locality

    The location, place or source where a holotype or type specimen was found.

    Used in 916 profiles

34. type material

    Collective term for all type specimens in a type series.

    Used in 5 profiles

35. type series

    Series of specimens which either constitutes the name-bearing type of a nominal species or subspecies, or from which the name-bearing type has been or may be designated

    Used in 120 profiles

36. typotype

    Used when a description or illustration serves as a type to refer to the specimen(s) on which it was based.