Tiguassu reginae

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Tiguassu reginae
Systematics
Class : Belt worms (Clitellata)
Subclass : Little bristle (Oligochaeta)
Order : Haplotaxida
Family : Tiguassuidae
Genre : Tiguassu
Type : Tiguassu reginae
Scientific name of the  family
Tiguassuidae
Brinkhurst , 1988
Scientific name of the  genus
Tiguassu
Righi , Ayres & Bittencourt , 1978
Scientific name of the  species
Tiguassu reginae
Righi , Ayres & Bittencourt , 1978

Tiguassu reginae is the name of a species of ground-dwelling little bristle (Oligochaeta) in the ringworm class of belt worms (Clitellata) that iswidespreadin Brazil and isthe only species of the genus Tiguassu and the family Tiguassuidae thatformsthe order of the Haplotaxida with the family Haplotaxidae .

features

The unpigmented body of Tiguassu reginae becomes about 3.3 cm long and 1 mm wide with a number of about 112 to 132 segments. There are four pairs of S-shaped bristles on each segment . The animal has an evertable pharynx and septal glands. The most striking feature of Tiguassu reginae is its trunk-like prostomium with a length of about 5 to 6 segments, as can only be found in the same way in Enantiodrilus bilolleyi ( Glossoscolecidae ) and similarly in individual Naididae and Lumbriculidae .

The esophagus forms a cylindrical chewing stomach between the 6th and 8th segment . The closed blood vessel system only has a pair of lateral hearts in the 11th segment . The large paired nephridia are well developed and are located in some segments in front of the gonads and in all segments behind the gonads.

The ring-shaped clitellum of the hermaphrodite consists of a layer of cells and extends from the 13th to the 17th or 18th segment. The annelid has a pair of testes in the 11th segment and a pair of ovaries in the 12th segment is so (starting from a okto gonadal shape with four pairs of gonads from the 10th to the 13th segment), and metandrisch Progyn, which is in the 10th Segment stunted and in the 11th segment fully developed sperm funnel there. Atria in the male sex canals are absent. The pair of male genital orifices are at the end of the 10th segment and the pair of female genitals at the end of the 11th segment. The sperm vesicles extend backwards over several segments within the ice sacs. Genital and penis bristles can be present or absent. In the 9th and 10th segment there are small paired receptacula seminis without blind sacs, so that in the 10th segment there are both exits of the receptacula seminis and male sexual exits - similar to mud tubeworms , but there are no ice sacs. The eggs are around 40 to 50 μm in size.

Distribution, habitat and way of life

Tiguassu reginae is common in Brazil . He became known through a find in Amazonia on the road from Manaus to Rio Branco , where three specimens were collected from a decaying tree trunk next to a river arm.

Surname

The generic name Tiguassu comes from the Tupi language and means "big nose" ( ti "nose" and guassu "big"). The specific epithet is derived from the name of the employee Regina Lúcia de Lima Lopes.

literature