sperm feeler distinct

Macrostomum lewisi Fig 1-4.jpg

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habitus total (Image keywords), stylet tip thickening asymmetrical blunt (Image keywords), stylet tip opening terminal (Image keywords), stylet shaft with more than one turn (Image keywords), stylet shaft decoration other (Image keywords), eyes normal (Image keywords), stylet base tubular (Image keywords), sperm feeler distinct (Image keywords), sperm bristles present (Image keywords)

Description:

The sperm cell is a thin filament with a small knobbed head containing granules. Setae are lacking in this cell. It is this present author's opinion that Okugawa has depicted an immature sperm cell. p. 205

Taxonomic name:

Macrostomum lewisi (Macrostomorpha)

Macrostomum reynoldsi Fig 21-25.jpg

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stylet tip opening subterminal (Image keywords), stylet tip thickening unclear (Image keywords), stylet shaft with more than one turn (Image keywords), stylet shaft decoration other (Image keywords), stylet base tubular (Image keywords), sperm feeler distinct (Image keywords), sperm bristles present (Image keywords), sperm shaft distinct (Image keywords)

Taxonomic name:

Macrostomum reynoldsi (Macrostomorpha)

Macrostomum obtusum Fig 7-10.jpg

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stylet tip opening subterminal (Image keywords), stylet shaft decoration absent (Image keywords), stylet shaft with more than one turn (Image keywords), stylet base tubular (Image keywords), stylet tip thickening unilateral pointed (Image keywords), sperm bristles absent (Image keywords), sperm shaft indistinct (Image keywords), sperm feeler distinct (Image keywords)

Description:

An oval terminal external opening is provided. p. 278

Taxonomic name:

Macrostomum obtusum (Macrostomorpha)

Macrostomum ruebushi var shenandoahensis Fig 27-30.jpg

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Keywords:

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

Taxonomic name:

Macrostomum ruebushi shenandoahensis (Macrostomorpha)

Macrostomum ruebushi var truncatum Fig 31-34.jpg

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Keywords:

habitus total (Image keywords), stylet shaft with one turn (Image keywords), stylet tip opening oblique (Image keywords), stylet tip thickening absent (Image keywords), stylet base bulbous (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 a funnel with a crenate base which is slightly obliquely truncated. The curved and pointed termination has a small distal lip. The opening is terminal. p. 45

Taxonomic name:

Macrostomum ruebushi truncatum (Macrostomorpha)

Macrostomum ruebushi var granulophorum Fig 19-23.jpg

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

Description:

This stilette is lined by bands of muscles which presumably aid in ejaculation. The stilette has a bend of almost a right angle at its sharpened termination and opening. p. 36

Taxonomic name:

Macrostomum ruebushi granulophorum (Macrostomorpha)

Macrostomum ruebushi var recurvostylum Fig 24-26.jpg

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

Description:

The eyes are small, black, and are not embedded in the brain tissue. The penis-stilette is an irregularly reduced funnel with a pointed end hooked into a right hand bend. The opening is terminal and is toward the posterior. The base is wide and crenated. p. 39

Taxonomic name:

Macrostomum ruebushi recurvostylum (Macrostomorpha)

Macrostomum ruebushi var crenatostylum Fig 11.jpg

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Keywords:

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

Description:

The long oval opening occupies the entire end of the bent portion of the stilette. The base is crenated. The hooked end of the stilette points ventrally toward the male opening. p. 29

Taxonomic name:

Macrostomum ruebushi crenatostylum (Macrostomorpha)

Macrostomum ruebushi var frigoriphilum Fig 14-18.jpg

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Keywords:

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

Description:

The fairly large reniform eyes are oriented in a latero-anterior fashion. The penis-stilette is a slightly curved funnel with a distally sharpened point. The opening is terminal. p. 33

Taxonomic name:

Macrostomum ruebushi frigorophylum (Macrostomorpha)

Macrostomum ruebushi Fig 8.jpg

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Description:

The penis-stilette is a greatly curved funnel which extends from a very broad, deeply indented base and suffers two changes of direction-one a half circle and the other a right angle bend at which point by a gradual reduction the genital canal terminates in a very sharp point. The external opening is terminal and oval in shape and is formed by an angular truncation of that part of the stilette. The sperm-cells possess a tactile feeler, an undulating midbody provided with two short setae, and a highly vibratile tail region. The setae appear early. A longitudinal row of chromatin granules extends from the origin of the lateroposterior pair of setae. p. 24

Taxonomic name:

Macrostomum ruebushi (Macrostomorpha)

Macrostomorpha

taxonomy and phylogeny

sperm feeler distinct