stylet shaft decoration lined
Macrostomum gilberti Fig 8-12.jpg
Macrostomum gilberti Fig 8-12.jpg
The penis-stilette in this Macrostomum is almost straight and is terminally curved in weakly pressed specimens. There are two flanges in the curved termination, the one on the convexity of the curve being longer than the one on the concavity of the curve. Thus, it appears, that this stilette, in which four lateroterminal borders may be seen, is cut in bias. p. 193/194
Macrostomum curvistylum Fig 4-6.jpg
Macrostomum curvistylum Fig 4-6.jpg
The external opening of the stilette is at an oblique angle. The proximal, basal part of the stilette is crenated. p. 192
Macrostomum collistylum Fig 1-3.jpg
Macrostomum collistylum Fig 1-3.jpg
The stylet reaches its termination in a long sharpened point. p. 188 The sperm cells are elongate, undulating bodies which lack the postero-Iateral setae so common to the genus and are possessed of chromatin granules in the anterior part of the cell having the largest caliber. p. 189
Macrostomum phillipsi Fig 13-16.jpg
Macrostomum phillipsi Fig 13-16.jpg
Macrostomum ruebushi var carolinensis Fig 9-10.jpg
Macrostomum ruebushi var carolinensis Fig 9-10.jpg
The penis-stilette is unique in that the proximal basal portion is not only dentated but is truncated at an oblique angle. This penis funnel is terminally curved and sharply pointed. The opening is terminal on this stilette. p. 27
Macrostomum ruebushi var granulophorum Fig 19-23.jpg
Macrostomum ruebushi var granulophorum Fig 19-23.jpg
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
Macrostomum ruebushi var recurvostylum Fig 24-26.jpg
Macrostomum ruebushi var recurvostylum Fig 24-26.jpg
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
Macrostomum ruebushi var crenatostylum Fig 11.jpg
Macrostomum ruebushi var crenatostylum Fig 11.jpg
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
Macrostomum ruebushi var frigoriphilum Fig 14-18.jpg
Macrostomum ruebushi var frigoriphilum Fig 14-18.jpg
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
Macrostomum ruebushi Fig 8.jpg
Macrostomum ruebushi Fig 8.jpg
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