''Penion marwicki'' is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

snail A snail is, in loose terms, a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name ''snail'' is also used for most of the members of the molluscan class Gastro ...

whelk Whelk (also known as scungilli) is a common name applied to various kinds of sea snail. Although a number of whelks are relatively large and are in the family Buccinidae (the true whelks), the word ''whelk'' is also applied to some other marine ...

, belonging to the true whelk

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Buccinidae The Buccinidae are a very large and diverse taxonomic family of large sea snails, often known as whelks or true whelks.Bouchet, P.; Gofas, S. (2010). Buccinidae. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. A ...

.WoRMS World Register of Marine Species: ''Penion marwicki'' (Finlay, 1930) †
/ref>

Description

''Penion marwicki'' is a large, extinct species of

Penion ''Penion'' is a genus of large marine snails, commonly known as siphon whelks, classified within the mollusc family Austrosiphonidae, the true whelks.MolluscaBase eds. (2021). MolluscaBase. Penion P. Fischer, 1884. Accessed through: World Regi ...

siphon whelk. The extinct species '' Penion exoptatus'', '' Penion clifdenensis'', and potentially also ''Penion marwicki'', may belong to the same evolutionary lineage as the extant species ''

Penion sulcatus ''Penion sulcatus'' is a species of medium-to-large predatory marine snail or whelk, commonly called the northern siphon whelk or kākara nui in Māori, belonging to the true whelk family Buccinidae. Description ''Penion sulcatus'' is a medium- ...

''. This hypothesis is based on geometric morphometric analysis of shell shape and size for all four taxa, as well as the analysis of morphometric variation exhibited all living species of ''Penion''.

Distribution

Fossils of ''Penion marwicki'' are found in the

South Island The South Island, also officially named , is the larger of the two major islands of New Zealand in surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman ...

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

, and are relatively common at sites in North Otago and South Canterbury.

References

External links

Museum of New Zealand Te Papa Tongarewa, Taxon: ''Penion marwicki'' (Finlay, 1930)

* ttp://www.fossilshells.nl/newzealmi018.html International Fossil Shell Museum: New Zealand Miocene {{Taxonbar, from=Q39088014 Buccinidae Gastropods of New Zealand Extinct animals of New Zealand Taxa named by Harold John Finlay