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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/21752


Title: Gundlachia dutrae   : n. sp. from Northwest Brazil (Mollusca: Basommatophora: Ancylidae)
Authors: Santos, Sonia Barbosa dos
Keywords: Mollusca - Ancylidae - Gundlachia dutrae - morphology
Issue Date: 31-Dec-1994
Publisher: Fundação Oswaldo Cruz, Fiocruz
Citation: Memórias do Instituto Oswaldo Cruz (ISSN: 1678-8060) Vol 89 Num 2
Abstract: A new species of Gundlachia, Gundlachia dutrae   , is described from northwest Brazil. It is distinguishable from other congeneric species by characteristics of the shell, radula and internal organs. Shell relatively high. Aperture near-circular; periostracum dark brown without periostracal hairs. Apex slightly inclined to the right, projected but not hooked, with an apical depression surrounded by a sculpture of well-marked irregular punctations. Shell surface with prominent radial sculpture. No septate specimens were observed. Ratios (n=59): shell width/shell length = 0,66-0,79 (mean 0,73); shell height/shell length = 0,32-0,45 (mean 0,37); shell height/shell width = 0,43-0,63 (mean 0,51). Body of normal ancylid type; mantle pigmentation dark brown or black, concentrated along the mantle collar. The dorsal surface of the right anterior muscle is elongated and medially constricted. The left anterior and the posterior muscles are almost elliptical. Adhesive area is V-shaped. Pseudobranch unpigmented bearing a very small and thin dorsal lobe. Ovotestis with more than 25 unbranched diverticula. Ovispermiduct with seminal vesicle rather developed. Elongated nidamental gland continuous with the glandular wall of the uterus. Nidamental gland appendix ending into a bulbous swelling. Spermathecal body almost rounded. Well-developed prostate with five long diverticula. Ejaculatory complex with long glandular flagellum, without a penis or true ultra-penis. "Penis sheath" developed. "Ultra-penis" projected as a tube inside the lumem of prepuce, with a slit between "ultra-penis" and "penis sheath". Rachidian tooth tetracuspid, with two median cusps assymmetrical and aculeated. Lateral teeth tricuspid, with a reduced endocon and a prominent mesocon. A well marked gap occurs between meso and ectocon. Marginal teeth similar to lateral ones. Jaw T-shaped, with about 28 dorsal plates.
URI: http://hdl.handle.net/1807/21752
Other Identifiers: http://www.bioline.org.br/abstract?id=oc94033
Rights: Copyright 1994 Memorias do Instituto Oswaldo Cruz.
Appears in Collections:Bioline International Legacy Collection

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