stylet shaft decoration absent

Macrostomum thermale Fig 11.jpg

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stylet base conical (Image keywords), stylet shaft decoration absent (Image keywords), section (Image keywords), stylet tip opening terminal (Image keywords), stylet tip thickening absent (Image keywords), stylet shaft curved (Image keywords), stylet base tubular (Image keywords)

Description:

The penis stilette is depicted as an irregular tube with a distal terminal splitting of the thickened walls. Taxonomically, M. lutheri is placed in species dubiae of the genus Macrostomum because of the unscientific methods used and the lack of material upon this animal. It is this present author's opinion that the stilette shown in figure is a greatly flattened and distorted stilette of Macrostomum bulbostylum mihi described in the same paper (GIEYSZTOR 1931). p. 143

Taxonomic name:

Macrostomum thermale (Macrostomorpha)

Macrostomum thermale Fig 33-34.jpg

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stylet shaft decoration absent (Image keywords), section (Image keywords), stylet tip opening terminal (Image keywords), stylet tip thickening absent (Image keywords), stylet shaft curved (Image keywords), stylet base tubular (Image keywords)

Description:

The pigmentspherules composing the cup (eyes) are the smallest that I have studied. Stylet: This tubular structure presents the figure of a long funnel with a widened crenate base and a slightly expanded termination. The opening is terminal. This species possesses a unique sperm-cell. This singular cell measures 36 micro in length and is equipped with the characteristic pair of anterior setae, a very thin feeler, and a tail region which bears a pair of lateral undulating flanges, in which region the chromatin granules are located. Chromatin granules are usually located in the anterior region of the sperm cell in Macrostomum. The feeler is a highly vibratile process. p. 125

Taxonomic name:

Macrostomum thermophilum (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 lutheri Fig 29.jpg

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

Taxonomic name:

Macrostomum lutheri (1) (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 curvata Fig 18.jpg

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

Taxonomic name:

Macrostomum curvata (Macrostomorpha)

Archimacrostomum beaufortense Fig 5.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), stylet tip thickening unilateral pointed (Image keywords)

Taxonomic name:

Archimacrostomum beaufortense (Macrostomorpha)

Axia gieysztori Fig 22-24.jpg

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habitus total (Image keywords), stylet tip opening subterminal (Image keywords), stylet shaft decoration absent (Image keywords), section (Image keywords), stylet shaft with more than one turn (Image keywords), eyes normal (Image keywords), stylet base tubular (Image keywords), stylet tip thickening unilateral pointed (Image keywords)

Description:

Pigment granules of the eyes quite small and not of uniform size. Penis stilette a sharply terminated conical tube, base crenated. External opening terminal with outlet on left side, point of stilette is slightly recurved. p. 426

Taxonomic name:

Axia gieysztori (Macrostomorpha)

Omalostomum schultzei Fig 2.jpg

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Taxonomic name:

Omalostomum schultzei (Macrostomorpha)

Macrostomum minuta Fig 19.jpg

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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), stylet base bulbous (Image keywords)

Taxonomic name:

Macrostomum minuta (Macrostomorpha)

Macrostomorpha

taxonomy and phylogeny

stylet shaft decoration absent