Radix (Radix) rubiginosa (Michelin, 1831)

Vinarski, Maxim V., Aksenova, Olga V. & Bolotov, Ivan N., 2020, Taxonomic assessment of genetically-delineated species of radicine snails (Mollusca, Gastropoda, Lymnaeidae), Zoosystematics and Evolution 96 (2), pp. 577-608 : 577

publication ID	https://dx.doi.org/10.3897/zse.96.52860
persistent identifier	https://treatment.plazi.org/id/C32835F3-F14A-51B9-BF47-6BF91233A961
treatment provided by	Zoosystematics and Evolution by Pensoft
scientific name	Radix (Radix) rubiginosa (Michelin, 1831)
status

Treatment

7. Radix (Radix) rubiginosa (Michelin, 1831) View in CoL Figs 4F View Figure 4 ; 6A-C. View Figure 6

Limnoeus rubiginosus Michelin 1831: 22.

Limnaeus succineus var. javanicus Mousson 1849: 42.

Limnaeus singaporinus Küster 1862: 35, pl. 6, fig. 17.

Limnaea crosseana Mabille and Le Mesle 1866: 130, pl. 7, fig. 5.

Limnaeus javanicus - von Martens 1867: 222.

Limnaeus javanicus var. intumescens von Martens 1867: 223.

Limnaeus javanicus var. obesus von Martens 1867: 223.

Limnaeus javanicus var. rubiginosus - von Martens 1867: 224.

Limnaea javanica var. subteres von Martens 1881: 88, figs 6, 7.

Limnaea javanica var. angustior von Martens 1881: 88, pl. 16, fig. 8.

Limnaea javanica var. porrecta von Martens 1881: 89, figs 9, 10.

Limnaea bongsonensis Bullen 1906: 14, pl. II, figs 5, 6.

Lymnaea auricularia rubiginosa - Hubendick 1951: 154, figs 342, 342; Brand 1974: 229, pl. 16, fig. 95 (partim).

Lymnaea rubiginosa - van Benthem Jutting 1959: 116.

Radix rubiginosa - Aksenova et al. 2018a: 4

TL.

The East-Indies. "The original specimens are said to come from Bogor in Java" ( Brandt 1974: 230).

Types.

Probably lost. We failed to find them in NMNH collection.

This species is endemic to Southeast Asia. Its findings supported by molecular evidence are known from a vast territory, i.e. Thailand, Singapore, Indonesia up to Lesser Sundas (Flores) and Mascarenes ( Réunion) [ Aksenova et al. 2018a]. Is has also been recorded from Cambodia, Laos and Vietnam ( Brandt 1974). However, the identification of R. rubiginosa , based on shell only, may be misleading. As Brandt (1974: 230) stated, "this race has often been confused with L. luteola Lamarck". Therefore, the actual range of R. rubiginosa is not satisfactorily outlined since many historical recordings of it were shell-based.

A high conical spire, almost straight tangential line and weakly-inflated body whorl are the most characteristic conchological traits of R. rubiginosa (see Fig. 6A-C View Figure 6 ) helping one to distinguish it from the rest of congeners inhabiting the south of Asia. The variation in the proportions of the copulatory organ of this species has not been studied. We dissected four specimens collected from different parts of the R. rubiginosa range (Thailand, Malaysia, Philippines). In all cases, the penis sheath was shorter than the praeputium (see Fig. 4F View Figure 4 ) and the ICA values varied between 1.02 and 1.59.

Taxonomic remark.

R. rubiginosa has an extensive synonymy and a special study is required to clarify the taxonomic identity of numerous nominal species of Radix , described from Indonesia and adjacent countries. Some of these names, such as Radix quadrasi ( Möllendorff, 1898) of Philippines, have been used in recent literature, but may well be synonyms of R. rubiginosa (see, for example, Stelbrink et al. 2019).

Kingdom	Animalia
Phylum	Mollusca
Class	Gastropoda
Order	Hygrophila
Family	Lymnaeidae
Genus	Radix
SubGenus	Radix