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Ecology and distribution of the freshwater planarian Schmidtea mediterranea in Tunisia
Seasonal variation in the number of animals present as well their state of maturity, were correlated with water temperature and sexually reproduces exclusively sexually through the formation of cocoons. Expand
Evolutionary history of Chaetognatha inferred from molecular and morphological data: a case study for body plan simplification
- S. Gasmi, G. Neve, N. Pech, S. Tekaya, A. Gilles, Y. Perez
- Biology, Medicine
- Frontiers in Zoology
- 21 November 2014
The distribution of some morphological characters traditionally used in systematics and for species diagnosis suggests that the diversity in Chaetognatha was produced through a process of mosaic evolution. Expand
Gonadotropin‐releasing hormone‐like immunoreactivity in the planarian Bdelloura candida (Platyhelminthes, Tricladida)
Observations suggest that the GnRH-like material found in specimens of B. candida may be involved in a variety of functions, including a possible pheromone-like role for mucous cells and the control of specific reproductive activities. Expand
Ovary cords organization in Hirudo troctina Johnson, 1816 and Limnatis nilotica (Savigny, 1822) (Clitellata, Hirudinea).
Generally, the organization of the ovary cords found in both studied species is broadly similar to those described in other hirudiniform leeches studied to date. Expand
An ultrastructural study of the ovary cord organization and oogenesis in Erpobdella johanssoni (Annelida, Clitellata: Hirudinida).
The ovary cord structure and oogenesis in Erpobdella johanssoni is analyzed under light, fluorescent and transmission electron microscopy and the obtained results with other clitellate annelids are compared with other arhynchobdellid leeches. Expand
Spermatogenesis and spermatozoon ultrastructure in Dugesia sicula Lepori, 1948 (Platyhelminthes, Tricladida, Paludicola)
This TEM-study shows that early spermatids joined by cytophores have rounded nuclei, which is similar to that of normal spermatozoon cells. Expand
CHECKLIST AND DISTRIBUTION OF MARINE AND FRESHWATER LEECHES (ANNELIDA, CLITELLATA, HIRUDINEA) IN TUNISIA WITH IDENTIFICATION KEY
The objectives of this study were to summarize historical and recent taxonomic data, and to propose an identification key for species signalized, taking into account the hydrobiological network of the country especially the North West region, which may reveal more species in the future. Expand
Erpobdellid leeches (Annelida, Clitellata, Hirudinida) from Tunisia: new records with the description of a new Trocheta species.
- Raja Ben Ahmed, A. Bielecki, J. Cichocka, S. Tekaya, M. Gorzel, A. Harrath
- Biology, Medicine
- 24 June 2013
A key for the determination of freshwater erpobdellid species from Tunisia is proposed and a comprehensive comparison of the three genera is presented. Expand
Annotations on marine and freshwater leeches (Annelida, Clitellata, Hirudinea) from North Africa
A total of 37 species belonging to 6 families and 19 genera are presently known, eight of which represent new records for North African countries, and Pontobdella muricata is reported for the first time from Morocco. Expand
Sperm transfer and fertilization in the marine planarian Sabussowia dioica (Platyhelminthes, Tricladida, Maricola)
This work has established that in the gonochoristic marine planarian Sabussowia dioica, the male animal produces sclerotic spermatophores that are deposited onto the body wall of the female and enter the ovaries and the anterior vitellarian follicles. Expand