Haementeria vizottoi

External morphology

Length: 23 to 28 mm; maximum width: 6 to 7 mm; acetabular diameter: 2.0 to 2.8 mm. Complete somites, with rings a1 and a3 subdivided ventrally, and rings a1, a2, and a3 subdivided dorsally. Gonopores separated by 2 rings: the male gonopore is located at XI/XII, and the female at XII a2/a3. Segments: I is 1-annulate; II is 2-annulate; III through XXIV are 3-annulate; XXV is 2-annulate; and XXVI and XXVII are 1-annulate. There are five main rows of tubercles: one median row on rings a1 and a3 (commencing at segment IX); two intermediate rows on ring a2; and two lateral-external rows on ring a3. Color: green, with 7 longitudinal dorsal stripes of a vermilion hue—one median, two paramedian, two intermediate, and two paramarginal; additionally, there are metameric spots (located on ring a2) and marginal spots, which are reddish-brown and quadrangular in shape.

Internal morphology

There are six pairs of testes. A transverse duct connects the two oviducts at their distal ends.

Habitat & range

Habitat

Freshwater

Region

South America