Corrosella piti, Álvarez & Glöer & López-Soriano & Raven & Alonso & Sánchez & Quiñonero-Salgado, 2024

Álvarez, José Francisco Martín, Glöer, Peter, López-Soriano, Joaquín, Raven, Han, Alonso, Álvaro, Sánchez, Omar & Quiñonero-Salgado, Sergio, 2024, A new Hydrobiidae species of the genus Corrosella Boeters, 1970 from Andalusia (S Iberian Peninsula), Nemus 14, pp. 112-121 : 116-117

publication ID

https://doi.org/10.5281/zenodo.17025843

persistent identifier

https://treatment.plazi.org/id/03FE87E9-4430-FFFA-FE9F-FC64FD6D7532

treatment provided by

Felipe

scientific name

Corrosella piti
status

sp. nov.

Corrosella piti View in CoL sp. nov.

( Figs. 1-3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Material. Holotype RMNH.MOL.350844, Naturalis . Paratypes: 3 s. RMNH.MOL.350845. 5 s. SQS coll. 5 s. PG coll. 12 s . JFMA 1056-20230615 coll .

Type locality. Fuente Cabera , Algodonales , Arroyo del Batán , Guadalete River basin (Cádiz province, Spain), 405m a.s. l. 30S X286871 Y4084628 JFMA leg. 4⁄6⁄2023 ( Fig. 4 View FIGURE 4 ) .

Etymology. Refers to the name of the mythological witch “ Piti ”, who is burnt during the Carnival of Cádiz as the final act of this festival.

Description. The ovate shell is reddish-brown with 2–4½ slightly convex, regularly growing whorls, and deep sutures. The surface is glossy. Teleoconch microsculpture formed by growth lines ( Fig. 3B View FIGURE 3 ). The aperture is pyriform-angled at the top, and the outer lip is straight from lateral view, slightly sinuated at the top ( Fig. 3A View FIGURE 3 ). The umbilicus is closed. In most of the specimens, only the 1½ last whorls are conserved, as the protoconch and initial whorls are largely to totally corroded ( Fig. 3 View FIGURE 3 ). The microsculpture of the corroded area is formed by numerous small holes ( Figs. 3 View FIGURE 3 C-3D). Animal has a dark brown mantle with a pattern of clear dots ( Fig. 2 View FIGURE 2 ).

Anatomy. The penis is long with a broad basis and a slender distal half ( Fig. 2C View FIGURE 2 ).

Dimensions. Shell height of 1.82–2.23 mm, and diameter of 1.30–1.63 mm. The aperture has dimensions of 0.96–1.27mm height and 0.74–0.91 mm in diameter. See Table 1 and Fig. 4 View FIGURE 4 .

Habitat. The species was found in a spring that runs without any human-mediated structure. There are two points where the water flows out of the calcareous rocks: one under a fig-tree, and another within the vegetation, just 15 metres apart, both barely visible

( Fig. 5 View FIGURE5 ). Animals were found only at these two points and in the small stream formed where the waters from the two points join. Downstream, in a concrete canal where the water is used for field irrigation, no shells were found. Search in the vicinities (Batán main stream) also yielded negative results for the species. All specimens were found on rocks and under small stones in the initial part of the spring ( Figs. 5 View FIGURE5 C-D).

Differentiating characteristics. Corrosella andalusica ( Delicado, Machordom & Ramos, 2012) , Corrosella bareai

S. Height S. Width SH SW HOLOTYPE 1.99 1.46 min 1.82 1.30

Corrosella piti sp. nov. max 2.23 1.63

(n=20) mean 1.89 1.47 st.dev . 0.114 0.100

RMNH

National Museum of Natural History, Naturalis

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