Tag Archives: taxonomy

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.

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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.

New Brazilian species (1)

Two papers were just published by Simone and Salvador, of which today the one about species from Minas Gerais. As usual these authors are keen to show the need for conservation of habitats which may house endemic or new species.

S&R_L

“A sample of land snails was recently collected in a fragment of Atlantic rainforest, in the vicinities of the city of Nanuque (north of Minas Gerais state, Brazil), totaling 15 species. The following new species are herein described: Leiostracus carnavalescus n. sp. and Rhinus botocudus n. sp. (Bulimulidae), and Obeliscus boitata n. sp. (Subulinidae), the first two accompanied by anatomical descriptions. Moreover, the geographical ranges of some species are extended to Minas Gerais: Auris bilabiata, Bahiensis cf. bahiensis, Cyclopomops moricandi, Dysopeas muibum, Helicina boettgeri, Helicina variabilis, Prohappia besckei, and Rectartemon piquetensis. The discovery of new species in such a small forest fragment is a clear reminder of how little the Brazilian terrestrial snail fauna is known. It also points to the fact that these few remaining forest fragments may house many new and possibly endemic species and should, therefore, be properly preserved”.

S&R_R

It may be noted that this paper was available on ResearchGate on the 19th April 2016, while the header states as publication date “30.IV.2016”.

Reference
Simone, L.R.L. & Salvador, R.B., 2016. Taxonomical study on a sample of land snails from Nanuque (Minas Gerais, Brazil), with descriptions of three new species. – Stuttgart Beiträge our Naturkunde A, Neue Serie 9: 9–30.

New paper published

Together with my colleague Corey Whisson, just published:

W&B2016a

A paper with a description of one new species is nothing to be taken too serious, but we are proud to present a novel way of (non-)dissection to study the genitalia: applying micro-CT and reconstruction with dedicated software. As far as we know this is one of the first times this method is applied to (land) molluscs in the context of describing a new species.

W&B2016b

Although the results presented here are satisfying, it is not necessarily a quick method and it is also quite laborious. However, in the case of a single or just a few specimens, this may be an alternative for destructive dissection. In this paper we show it as a ‘proof of principle’ for the application of this method.

Reference:
Whisson, C.S. & A.S.H. Breure, 2016. A new species of Bothriembryon (Mollusca, Gastropoda, Bothriembryontidae) from south-easternmost Western Australia. — ZooKeys 581: 127–140.