Rotifer classification and trophi morphology

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Presentation transcript:

Rotifer classification and trophi morphology

Rotifer trophi Differentiation of the pharynx Mastax = Muscular organ containing Hard elements = trophi

Rotifer trophi Uncus (unci) + Manubrium (manubria) = malleus Ramus (rami) + Fulcrum = Incus Uncus Manubrium Ramus Fulcrum Hue University Rotifer Taxonomy workshop 6-12 March 2010

Uncus Manubrium Ramus Fulcrum Hue University Rotifer Taxonomy workshop 6-12 March 2010

Classification of the Rotifera Class Pararotatoria (1 order, 1 family) Class Eurotatoria (2 subclasses) Subclass Bdelloidea (4 families) Subclass Monogononta (2 superorders) Superorder Pseudotrocha (1 order) (23 families) Order Ploima 86 (23 families) o.a. Asplanchnidae, Brachionidae , Dicranophoridae, Lecanidae, Lindiidae, Notommatidae, Synchaetidae, Trichocercidae Superorder Gnesiotrocha Kutikova, 1970 (2 orders) Order Flosculariaceae Harring, 1913 (5 families) Order Collothecaceae Harring, 1913 (2 families)

Different types of trophi Ramate No fulcrum Unci teeth numerous, largest teeth central Manubria soft, ribon-shaped In Bdelloidea, small-particule feeders (filter feeders, grazers)

Different types of trophi Malleoramate Fulcrum short Unci teeth numerous, largest teeth proximal Manubria soft, with “cells” In Monogononta, Gnesiotrocha, Flosculariacea, filter-feeders

Different types of trophi Uncinate Fulcrum short Few unci teeth, crescent-shaped Manubria weak In Monogononta , Gnesiotrocha, Collothecacea, sit-and-wait predators

Different types of trophi Malleate Fulcrum short Unci with large number of teeth, largest teeth proximal Manubria with shaft In Monogononta, Ploima: Brachionidae, Epiphanidae, Lecanidae,... filter-feeders

Different types of trophi Cardate Fulcrum short 1-2 pairs of unci teeth Manubria with shaft and large ventral apophysis Trophi commonly with accessory elements (epipharynx,...) In Monogononta, Ploima: Lindiidae, specialist feeders

Different types of trophi Virgate Fulcrum elongate Small number of unci teeth Manubria with elongate shaft Rami bent to dorsally Very variable! In Monogononta, Ploima: Notommatidae, Trichocercidae, ... Varied food sources (large particules)

Different types of trophi Forcipate Fulcrum short 1-2 pairs of unci teeth Manubria with elongae shaft Rami + flat In Monogononta, Ploima: Dicranophoridae Predators

Different types of trophi Incudate Fulcrum short Unci and manubria trongly reduced Rami pincer-shaped In Monogononta, Ploima: Asplanchnidae, predators

Different types of trophi Fulcrate Elongate fulcrum Unci reduced, no manubria Rami with elongate alulae (wings) In Seisonida

Some hard studying ahaid…