Boetersiella sturmi ( Rosenhauer 1856 )

Arconada, B. & Ramos, M. A., 2001, New data on Hydrobiidae systematics: two new genera from the Iberian Peninsula, Journal of Natural History 35 (7), pp. 949-984 : 957-963

Boetersiella sturmi ( Rosenhauer 1856)

(®gures 5A±J, 6A±F, 7A±F, 8A±D, tables 1±4)

Synonymy

Paludina sturmi Rosenhauer, 1856 (only shell).

HauOEenia (Neohoratia) sturmi (Rosenhauer) , Boeters, 1981: 61 (only lectotype).

HauOEenia sturmi ( Bernasconi, 1986) : 186 (in part)

Horatia (?) sturmi (Rosenhauer) , Boeters, 1988: 220 (only shell); Ramos , RolaÂn and Moreno, 1992: 485 (shell and anatomy), Arconada, Ramos and RolaÂn, 1996: 20 (shell and anatomy).

Material examined

LECTOTYPE. NhMW (Naturhistorische s Museum , Vienna).

Additional material. Diezma ( Granada), Fuente Grande, Sierra Harana, UTM: 30SWG592308, 23 April 1992, D.M., MNCN. 15.05 / 33144 (ethyl alcohol material and gold-coated SEM mount), 12 October 1992, E. R., D.M., MNCN. 15.05 / 33145 (ethyl alcohol material), E. R., MNCN. 15.05 / 33146 (ethyl alcohol material). Mata Bejid (JaeÂn), La Mata spring, UTM: 30SVG553721, 28 September 1989 (ethyl alcohol material and gold-coated SEM mount), E. R., MNCN. 15.05 / 33147 (ethyl alcohol material), 24 March 1998, B.A., MNCN. 15.05 / 33148 (ethyl alcohol and frozen material) .

Type locality. Sierra Harana, Granada ( Rosenhauer, 1856: 423).

Morphology

Shell (®gures 5A±I, 6A±D, table 1). The shell is dextral, very small, with 3.5 whorls. The teleoconch has a very well-developed body whorl that occupies seveneighths of total shell length. The protoconch has 1.25 whorls and a smooth pit-like microsculpture. Protoconch width is approximately 375 m m and it has a broad nucleus measuring around 207 m m. The aperture is oval and has a thick inner lip overlapping the umbilicus. The periostracum is yellowish.

Operculum (®gure 6E, F; measurements in table 2). The operculum has an intense orange colour.

External body features. The head is very dark and uniformly pigmented (®gure 8A) except in juveniles which show a less dark pigmentation. The tentacles show a black middle longitudinal streak and the mantle epithelium is uniformed black pigmented.

Nervous system. The RPG ratio is 0.515.

Radula (®gure 7A±F, table 3). Radular ribbon measuring approximatel y 607 m m with more than 52 rows of teeth. Lateral teeth with a central cusp ¯anked by four inner cusps on each side. Inner marginal teeth with 24±29 very regular cusps. The distance between the basal cusps of the central teeth is approximately 11 m m. The central cusp of the central tooth does not protrude very much between the minute poorly de®ned lateral denticles.

Female reproductiv e system (®gures 3B, 8C, D, table 4). The kidney-shape d pallial oviduct constitutes approximately one-third of the pallial cavity. The capsule gland measures almost three-quarters of the length of the pallial oviduct and is almost

L. length; W, width; SD, standard deviation; CV, coe cient of variation, mean range in brackets. entirely located in the pallial cavity. The posterior part of this capsule and the albumen gland are completely situated behind the pallial cavity. The bursa copulatrix is roundish, well developed and almost one-third of the length of the pallial oviduct. The bursal duct is long and slightly widened at the base of the bursa. The renal oviduct coils in a simple, open loop that has a constant shape in all the populations.

Male reproductive system (®gures 3A, 8A, B, table 4). The penis is unpigmented and has no papillae or appendages. Its basal portion is very wide. The penial duct runs straight in the central part and weakly undulates in the base. The penis is short, being less than three-quarters of the total length of the head. The half portion of the prostate is located inside the pallial cavity.

Remarks. Comparing raw data, the lectotype of B. sturmi is bigger than the other shells studied from this species (®gures 5A±I). Nevertheless, the ratio between its main shell variables is very similar to the populations here studied (Fuente Grande and Mata Bejid).

Habitat and distribution. This species has been found in only two localities: Fuente Grande (Sierra Harana), where it adheres to the aquatic vegetation, and Fuente de La Mata (Mata Bejid), where it is easily distinguishable because the dark shell stands out on the stones. Other freshwater molluscs from these localities are: Ancylus X uviatilis (MuÈller, 1774), Lymnaea truncatula (MuÈller, 1774) , Neohoratia schuelei ( Boeters, 1981) , Pseudamnicola (Corrosella) luisi Boeters 1984 and Pisidium casertanum (Poli, 1791) .