Tag Archives: taxonomy

Tautonyms of Jousseaume

Just published: a paper on Jousseaume’s tautonyms by Leo van Gemert and myself.

We present a short biography of Félix-Pierre Jousseaume (12 April 1835-3 November 1921) and an addition to his bibliography. He published in total 138 malacological and 21 non-malacological articles or books. In the appendix additional references are listed in comparison with an earlier published preliminary bibliography. Jousseaume received many comments from other malacologists, especially for his tautonyms. Critical remarks from Weinkauff, Tryon, Woodward and Mellvill, and one comment from Jousseaume, are cited.

In total Jousseaume published 28 new species-level taxa as primary, absolute taunonyms (new genus and new species) and 24 secondary ones (22 with a new genus and 2 with a new species name). The virtual tautonyms (with almost identical genus and species names) are not discussed. However, for four taxa of Jousseaume it is unclear if the taxon is a tautonym or a virtual tautonym. In our view the problems were caused by carelessness of Jousseaume. These four taxa are discussed extensively and a conclusion is presented on the correct name. The results are shown in the tables with the original name (invariably the tautonym), source of the original name, and the present view on the taxon with the source and (explanatory) remarks”.

Reference:
Gemert, L.J. van & Breure, A.S.H., 2017. The tautonyms of Jousseaume: a taxonomical studt. – Folia conchyliologica, 42: 14-23.

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Phylogenetic data on Sagdoidea

As an advance online publication, recently appeared the paper by Sei et al. on the phylogenetic relationships within the Sagdoidea.

The abstract reads: “We performed multi-locus, time-calibrated phylogenetic analyses of Jamaican Pleurodontidae to infer their relationships within pulmonate land snails. These analyses revealed that Sagdoidea, with about 200 species in the Caribbean Basin and neighbouring regions, is the sister group of Helicoidea with about 4700 species worldwide and that these superfamilies diverged 61–96 Ma. Morphological disparity in Sagdoidea is similar to that in Helicoidea despite its much lower species richness. Helicoidea originated in the New World and colonized the Old World 46–64 Ma. Pleurodontids and sagdids colonized Jamaica 15.0–18.4 and 12.8–16.5 Ma, respectively, consistent with geological estimates of Jamaican subaerial emergence by mid-Miocene. Allopatric convergence in shell morphologies required caution in using fossils from outside the geographic range of ingroup taxa to calibrate molecular clock estimates. Estimates of ages of clades varied by 24–55%, depending on the calibration points included. We use these results to revise Helicoidea and Sagdoidea. Pleurodontids from Jamaica and the Lesser Antilles were reciprocally monophyletic but other putative pleurodontids grouped basally in Helicoidea as Labyrinthidae (new family), or with Sagdidae. Newly recognized members of Sagdoidea are Solaropsinae and Caracolinae (Solaropsidae), Polydontinae (Sagdidae) and Zachrysiidae (new family). Pleurodontidae is restricted to two subfamilies, Pleurodontinae, in the Lesser Antilles, with Gonostomopsinae, a synonym, and Lucerninae resurrected for the Jamaican endemic genera Lucerna, Dentellaria, Thelidomus and Eurycratera. Lucerna and Dentellaria have been treated as subgenera of Pleurodonte, but rendered it paraphyletic in our analyses”.

This is a nice piece of research for which the authors did extensive DNA research with 3 loci and divergence time analysis. This resulted in a major taxonomical revision of the group, defining the Pleurodontidae and erecting the Labyrinthidae and Zachrysiidae.

Reference:
Sei, M., Robinson, R.G., Geneva, A.J. & Rosenberg, G., 2017. Doubled helix: Sagdoidea is the overlooked sister group of Helicoidea (Mollusca: Gastropoda: Pulmonata). – Biological Journal of the Linnean Society, XX: 1-32 [advance online publication, hence the correct reference will be different].

An overlooked designation

Taxonomy of fossils and recent species sometimes intertwines as demonstrated by a new publication of Kadolsky.

A nice update for the correct names of the Hispaniolan malacofauna.

Reference:
Kadolsky, D., 2017. On the type species of the genus Galactochilus Sandberger, 1875, with a review of the identity of Helix cornumilitare Linnaeus, 1758 and of its misidentifications (Gastropoda: Helicoidea). – Archiv für Molluskenkunde, 146: 97-110.

New Epiphragmophoridae from Brazil

Just published: a paper by Cuezzo & Pena describing a new genus and species of Epiphragmophoridae; their abstract reads as follows “We describe a new genus and a new species in the family Epiphragmophoridae, Minaselates paradoxa sp. n. The new species was found at the National Park Cavernas do Peruaçu, in northern portion of the state of Minas Gerais, Brazil. Minaselates paradoxa sp. n. is classified in Epiphragmophoridae based on the fact that it shares the following diagnostic features of the family: a dart apparatus with a single dart sac, and two unequal mucous glands at the terminal genitalia. Minaselates gen. n. differs from Epiphragmophora Doering, 1874 by having a granulose protoconch, shell spire with blunt apex, complex microsculpture on the teleoconch and closed umbilicus fused with the shell wall. Also, significant differences between the two genera are the presence of a long and thin kidney that extends more than half the length of the pulmonary cavity, the presence of a flagellar caecum, and a smooth jaw in Minaselates gen. n. The finding of this new species and genus is particularly significant to refine the definition of the family, since Epiphragmophoridae has been traditionally diagnosed using the same characters of Epiphragmophora. Dinotropis Pilsbry & Cockerell, 1937, the other valid genus in the family, is monospecific and is only known by the morphology of the shell. In many ways it is similar to Epiphragmophora. A cladistics analysis was made in the present study which supports Minaselates gen. n. as a different entity and as sister group of the Epiphragmophora within Epiphragmophoridae”.

Reference:
Cuezzo, M.G. & Pena, M.S., 2017. Minaselates, a new genus and new species of Epiphragmophoridae from Brazil (Gastropoda: Stylommatophora: Helicoidea). – Zoologia, 34: e13240 (12 pp.). DOI: 10.3897/zoologia.34.e13230

Review of part of Hispaniolan Annulariidae

The third post on Watters’ 2016 papers concerns his review of the Paracondria (Chondropomorus) complex. “Nineteen species are recognized including eight new species: Parachondria anatolensis n. sp., Parachondria arcisensis n. sp., Parachondria daedalus n. sp., Para- chondria heatheraikenae n. sp., Parachondria isabellinus n. sp., Parachondria muchai n. sp., Parachondria silvaticus n. sp., and Parachondria stigmosus n. sp. Distributional and habitat notes are given for additional taxa. Chondropoma marinum “Weinland” Reeve, 1863, is regarded as a nomen dubium. Chondropoma (Chondropomorus) moroni Bartsch, 1946, is reidentified as Crossepoma emilianum (Weinland, 1862). Chondropoma simplex Pfeiffer, 1852, regarded by Bartsch (1946) as a Chondropomorus, is considered a Chondropoma”.

schermafbeelding-2017-02-08-om-08-29-34 schermafbeelding-2017-02-08-om-08-30-03

Reference:
Watters, G.J., 2016. Review of the Hispaniolan Parachondria (Chondropomorus) complex (Gastropoda: Littorinoidea: Annulariidae). – Zootaxa, 4127 (2): 245–275.

New paper

Today a new paper was published about Caribbean molluscs, viz. the land snail fauna of Saint Kitts and Nevis in the Lesser Antilles.

The abstract reads: “An overview of the land snail fauna of the Lesser Antillean islands of Saint Kitts and Nevis is given, based on data from literature and two recent surveys. There are 33 taxa listed, of which 26 are from Saint Kitts and 22 from Nevis. One taxon is described as new: Bulimulus ouallensis Breure and Hovestadt. Furthermore, the following taxa are recorded from these islands for the first time: Bulimulus diaphanus fraterculus (Potiez and Michaud, 1835), Obeliscus swiftianus (Pfeiffer, 1854), and Zonitoides arboreus (Say, 1817). Four taxa—Diplosolenodes sp., Pallifera sp., and two Succinea species—could only be identified to the genus level. Three taxa, previously thought to occur on the islands, are now removed from their faunal lists, due to inaccuracies of provenance of specimens or misidentifications. Finally, remarks are given on the distribution and conservation status of species collected during the surveys”.

Schermafbeelding 2016-06-14 om 18.26.58

Reference:
Breure, A.S.H., A. Hovestadt, A. Fields & D.G. Robinson. The land Mollusca of Saint Kitts and Nevis (Lesser Antilles), with description of a new species. — The Nautilus 130: 27–52.

New Brazilian species (2)

The second paper is describing a new species from western Bahia State, with an emended description of the recently described genus Kora, with a revision of species ascribed to it.

“A new species of land snail was recently found in the municipalities of Carinhanha, Serra do Ramalho and Coribe, western Bahia state, Brazil. It is described herein as Kora rupestris n. sp. and can be easily recognized from its congeners by its usually narrower shell and aperture, and especially by its protoconch sculpture pattern. In light of this new discovery, new emended diagnosis and description are provided for the genus Kora, and two taxa previously described under this genus are excluded, being transferred to the genus Drymaeus [D. iracema (Simone, 2015) n. comb. and D. terreus (Simone, 2015) n. comb.]. The region where the new species was found consists of a contact zone of the Caatinga and Cerrado biomes. Such regions are proving to be quite diverse and a more thorough knowledge of their fauna is of utmost importance for future conservation efforts”.

R&S_K

As a consequence of the availability of more material, Kora is now transferred from the family Orthalicidae to the family Bulimulidae.

This paper too was available on the net before the official publication date.

Reference
Salvador, R.B. & Simone, L.R.L., 2016. A new species of Kora from Bahia, Brazil (Gastropoda: Pulmonata: Orthalicoidea), with an emended diagnosis of the genus. – Stuttgart Beiträge zur Naturkunde A, Neue Serie 9: 1–7.