An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms

by Paul S. Mikkelsen

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Term Definition

INVALID SPECIES   Names not to be used; said of an improper name (those proposed improperly) in TAXONOMY. Do not confuse with validly proposed names which have become NOMINAL SPECIES or SYNONYMS.

NEW SPECIES   A previously undescribed SPECIES; = SPECIES NOVUM.

NOMINAL SPECIES   Any named SPECIES, regardless of the validity of the name. Nominal species names may become SYNONYMS of accepted species names.

SPECIES   [need definition]; see also: SUBSPECIES; DIAGNOSIS.

(abbrev: SP. NOV.;
  A new SPECIES; Used in publication the first time (and first time only!) that a new BINOMEN is presented; e.g. "Acteocina atrata, spec. nov." as published in The Veliger 27(2):164-192. See also: GENUS NOVUM

SUBSPECIES   [need definition]; see also: FORM; SPECIES; VARIETY.

TYPE SPECIES   A SPECIES chosen as representative of an entire GENUS.

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