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stylet tip opening terminal
Macrostomum bulbostylum Fig 19-22.jpg
Macrostomum bulbostylum Fig 19-22.jpg
Macrostomum beauchampi Fig 9.jpg
Macrostomum beauchampi Fig 9.jpg
Macrostomum bulbostylum Fig 32-35.jpg
Macrostomum bulbostylum Fig 32-35.jpg
Macrostomum japonicum Fig 26-28.jpg
Macrostomum japonicum Fig 26-28.jpg
eyes small, reniform. The penis-stilette is a curved and distally hooked funnel with a terminal opening. p. 204
Macrostomum nassonovi Fig 6.jpg
Macrostomum nassonovi Fig 6.jpg
This stilette is a completely bent spiralled and sharply pointed tube. p. 277
Macrostomum lewisi Fig 1-4.jpg
Macrostomum lewisi Fig 1-4.jpg
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
Macrostomum rhabdophorum Fig 26.jpg
Macrostomum rhabdophorum Fig 26.jpg
Roughly crenated base. The termination is a very peculiar structure, three drawings of which are given better describe it (Fig. 22). Lateral, end, and dorsal views (a), (b), are shown. The sperm cell is a tapering filament which is possessed lateral setae in the posterior third of the cell. It is interesting note that the greatest number of sperm cells in this species is produced in the latter part of June, the warmest part of the summer in the Mountain Lake region. Also of interest is the fact that sperm is liberated in macerations of the animal will make attempts to penetrate the egg of the parent. The 'feeler' is a slowly undulating tactile organ as long as the sperm cell remains in the body of the animal, but it becomes a highly vibratile structure when in maceration. p. 289
Macrostomum tuba var gigas Fig 14.jpg
Macrostomum tuba var gigas Fig 14.jpg
The penis-stilette is a simple, slightly curved, slender, non-pointed funnel. p. 145
Macrostomum tuba Fig 13.jpg
Macrostomum tuba Fig 13.jpg
The distal part of the stilette is slightly curved and has an expanded termination which is split in two parts. p. 128
Macrostomum thermale Fig 11.jpg
Macrostomum thermale Fig 11.jpg
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