Pomacea haustrum
species of mollusc
Pomacea haustrum, common name the titan applesnail, is a species of large freshwater snail with an operculum, an aquatic gastropod mollusk in the family Ampullariidae, the applesnails.
Original description
Pomacea haustrum was originally described under the name Ampullaria haustrum by Lovell Augustus Reeve in his book Conchologia Iconica, in 1856.
In Reeve's original text, (the type description) reads as follows:
Species 23. (Mus. Cuming.)
AMPULLARIA HAUSTRUM. Amp. testâ compressè
ovatâ, ventricosissimâ, vix umbilicatâ, spirâ
parvâ, subimmersâ, anfractibus ad suturam
impressè canaliculatis, deinde convexis; sordidè
olivaceâ, striatâ et malleatâ, fasciis angustis
pallidè virescentibus cingulatâ; aperturâ
pyrifomi-oblongâ, peramplâ; fauce livida-
purpureâ.
THE SCOOP AMPULLARIA. Shell compressly ovate,
very ventricose, scarcely umbilicated, spire small,
rather immersed, whorls impressly channelled at
the suture, then convex; dull olive, striated and
malleated, encircled with narrow faint green
bands; aperture pyriformly oblong, very large;
livid purple in the interior.
Hab. River Maranon, Brazil.
This fine species belongs to the same type as A. insularum, D ́Orbigny, from La Plata.
This brief starts where responsible research should: with the source description of “Pomacea haustrum” as species of mollusc. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the science & nature register because the source frames it as species of mollusc. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Apr 29, 2026. The linked authority identifier is Q3168644. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1856.
Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Pomacea haustrum” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.