Premium
Neotypification and Ontogenesis of L eptopharynx costatus costatus Mermod, 1914
Author(s) -
Omar Atef,
Foissner Wilhelm
Publication year - 2012
Publication title -
journal of eukaryotic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 1066-5234
DOI - 10.1111/j.1550-7408.2012.00620.x
Subject(s) - primordium , population , biology , anatomy , ureterocele , medicine , urinary system , biochemistry , environmental health , gene
Using standard methods, we studied the morphology and ontogenesis of a G erman L eptopharynx costatus costatus . This population makes two morphs: microstomes with a size of 40 × 25 μm, about 190 basal bodies, and 5 μm wide oral basket; and macrostomes with a size of 55 × 40 μm, about 264 basal bodies, and 15 μm wide oral basket. Because the identity is threatened, this population is designated as the neotype of L . costatus costatus . Ontogenesis is complex due to the preoral kineties and the postoral complex produced by kineties 9 and 10. Stomatogenesis is mixokinetal: the opisthe membranelles 1 and 2 are formed by the oral primordium, whereas membranelle 3 is produced by the posterior portion of somatic kinety 1. The nasse kinetosomes are generated by the anterior portion of the oral primordium. Preoral kineties 1 and 3 develop de novo, while kinety 2 originates by intrakinetal proliferation of kinety 8; preoral kinety 4 is produced by the postoral complex, thus being a somatic kinety. Kinety 6 has two anterior kinetids in line with kinety 7. These observations require changes in the descriptive morphology, support the classification of L eptopharynx into the M icrothoracidae, and sustain the nonmonophyly of the N assophorea.