stylet base conical

Macrostomum megalogastricum Fig 30-31.jpg

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habitus total (Image keywords), stylet base conical (Image keywords), stylet shaft with one turn (Image keywords), stylet tip opening terminal (Image keywords), stylet tip thickening absent (Image keywords), stylet shaft decoration other (Image keywords), eyes normal (Image keywords)

Taxonomic name:

Macrostomum megalogastricum (Macrostomorpha)

Macrostomum hystrix Fig 28.jpg

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stylet base conical (Image keywords), stylet tip thickening unclear (Image keywords), stylet shaft with one turn (Image keywords), stylet shaft decoration absent (Image keywords), stylet tip opening unclear (Image keywords)

Description:

The penis-stilette has a rather narrow crenated base, a wider middle portion and presents a gradual curve from the base to the hooked and sharply pointed end in which the opening is located. p. 47

Taxonomic name:

Macrostomum hystrix (Macrostomorpha)

Macrostomum pseudoobtusum Fig 32.jpg

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stylet base conical (Image keywords), stylet shaft with one turn (Image keywords), stylet shaft decoration absent (Image keywords), stylet tip opening terminal (Image keywords), stylet tip thickening absent (Image keywords)

Description:

The inadequate description of the male genital system, and the failure to have observed the female system in the single specimen found constitutes reasons for placing the species of PEREYASLAWZEWA under the category of species dubiae. p. 144

Taxonomic name:

Macrostomum pseudoobtusum (Macrostomorpha)

Macrostomum virginianum Fig 18-24.jpg

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habitus total (Image keywords), stylet base conical (Image keywords), stylet shaft with one turn (Image keywords), stylet tip opening oblique (Image keywords), stylet tip thickening absent (Image keywords), stylet shaft decoration other (Image keywords), eyes normal (Image keywords), sperm feeler distinct (Image keywords), sperm bristles present (Image keywords), sperm shaft distinct (Image keywords)

Description:

The penis-stilette is unusually small for an animal of this size. It measures 35micro in length. Morphologically, the stilette is a simple, curved, funnel-like tube with a sub-terminal opening which is subtended by the pointed end. The sperm-cell is spindle-shaped. Two setae are present and there is a very large undulating 'Mittelrippe' on the mid-line of the surface of the cell extending from feeler to 'tail'. Chromatin material is not visible in this sperm-cell. p. 132/133

Taxonomic name:

Macrostomum virginianum (Macrostomorpha)

Archimacrostomum beaufortense Fig 5.jpg

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stylet base conical (Image keywords), stylet tip opening subterminal (Image keywords), stylet shaft with one turn (Image keywords), stylet shaft decoration absent (Image keywords), stylet tip thickening unilateral pointed (Image keywords)

Taxonomic name:

Archimacrostomum beaufortense (Macrostomorpha)

Omalostomum schultzei Fig 2.jpg

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Taxonomic name:

Omalostomum schultzei (Macrostomorpha)

Macrostomum appendiculatum Fig 13-14.jpg

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Keywords:

habitus total (Image keywords), eyes small (Image keywords), stylet base conical (Image keywords), stylet tip thickening unclear (Image keywords), stylet shaft with one turn (Image keywords), stylet shaft decoration absent (Image keywords), stylet tip opening unclear (Image keywords)

Taxonomic name:

Macrostomum appendiculatum (Macrostomorpha)

Macrostomum distinguenda Fig 17.jpg

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Keywords:

stylet base conical (Image keywords), stylet tip opening subterminal (Image keywords), stylet shaft decoration absent (Image keywords), stylet tip thickening unilateral pointed (Image keywords), stylet shaft sickle-shaped (Image keywords)

Taxonomic name:

Macrostomum distinguenda (Macrostomorpha)

Promacrostomum paradoxicum Fig 20-21.jpg

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Keywords:

stylet base conical (Image keywords), stylet tip opening subterminal (Image keywords), stylet shaft with one turn (Image keywords), stylet shaft decoration absent (Image keywords), section (Image keywords), stylet tip opening oblique (Image keywords), stylet tip thickening asymmetrical blunt (Image keywords)

Taxonomic name:

Promacrostomum paradoxicum (Macrostomorpha)

Macrostomum ruebushi var kepneri Fig 1-4.jpg

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Imaging technique:

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Keywords:

habitus total (Image keywords), eyes small (Image keywords), stylet base conical (Image keywords), stylet shaft with one turn (Image keywords), stylet shaft decoration absent (Image keywords), stylet tip opening oblique (Image keywords), stylet tip thickening unilateral pointed (Image keywords), sperm feeler distinct (Image keywords), sperm bristles present (Image keywords)

Description:

Penisstilette entirely straight, thin walled, terminus sharply pointed, opening terminal. Sperm cells unextended, divided into tail, body, and feeler regions with highly refractive unit in body region, without 'Nebengeisseln'. p. 283

Taxonomic name:

Macrostomum ruebushi kepneri (Macrostomorpha)

Macrostomorpha

taxonomy and phylogeny

stylet base conical