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Taxon profile

genus

Architectonica Röding, 1798

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Allogastropoda »  family Architectonicidae - Sundials

Description

Teleoconch: shell usually large to extremely large, usually strong-walled, low to tall cone-shaped; umbilicus always open, moderately wide to wide (16-35% of shell diameter); upper point of whorl attachment above peripheral keel of preceding whorl, resulting in formation of distinct suture; whorls on upper (apical) side somewhat bulging; apical side with weak axial grooves; spiral ribbing either lacking except for subsutural rib (perspectiva-group), or distinctly developed (maxima-group); base usually smooth except for infraperipheral rib and two nodose ribs surrounding umbilicus (= PUR and UC) [some juveniles and A. nobilis have additional basal sculpture]; umbilical wall without spiral ribs; usually very regular, lively color pattern of flecks or bands in various shades of brown, fresh specimens with purplish hue in interior of aperture. Protoconch: small to very large (ca. 0.66-1.8), distinctly heterostrophic, with weak ridge in anal keel area, occasionally with distinct anal keel. Radula: ptenoglossate-like; rachidian (if present) smooth, without additional cusps, flanked by 7-14 marginals on either side; outer marginals with 2 long processes each. Operculum: horny, ear-shaped with very broad last whorl, flat with often callously thickened peg-like projection on body side.

The species in this genus can be sorted into two groups, based on the sculpture of the mid-field, a part of the upper-side shell-sculpture. The two resulting groups, here termed "perspectiva-group" and "maxima-group," are not considered to comprise monophyletic units, but such a division merely facilitates identification. Specimens of the "perspectiva-group" have mid-rib (MR) areas that are undivided, while members of the "maxima-group" have mid-rib areas that are divided by a distinct groove into an upper (UMR) and a lower (LMR) mid-rib.
Bieler, R. (1993). Architectonicidae of the Indo-Pacific (Mollusca, Gastropoda).
Author: Jan Delsing

Included taxa

Number of records: 17

species Architectonica arcana Bieler, 1993

Architectonica arcana

species Architectonica consobrina Bieler, 1993

Architectonica consobrina

species Architectonica grandiosa Iredale, 1931

Architectonica grandiosa

species Architectonica gualtierii Bieler, 1993

Architectonica gualtierii

species Architectonica karsteni Rutsch, 1934

Architectonica karsteni

species Architectonica laevigata (Lamarck, 1816)

Architectonica laevigata

species Architectonica maxima (Philippi, 1849)

Architectonica maxima

species Architectonica modesta (Philippi, 1849)

Architectonica modesta

species Architectonica nobilis P. F. Röding, 1798

Architectonica nobilis

species Architectonica perdix (Hinds, 1844)

Architectonica perdix

species Architectonica perspectiva (Linnaeus, 1758)

Architectonica perspectiva

species Architectonica picta (Philippi, 1849)

Architectonica picta

species Architectonica purpurata (R. B. Hinds, 1844)

Architectonica purpurata

species Architectonica regia Hanley, 1862

Architectonica regia

species Architectonica stellata R. A. Philippi, 1849

Architectonica stellata

species Architectonica taylori Hanley, 1862

Architectonica taylori

species Architectonica trochlearis (Hinds, 1844)

Architectonica trochlearis


Links and literature

EN The Interim Register of Marine and Nonmarine Genera [1117973]

Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [http://www.irmng.org] [as Architectonica Röding, 1798]
Data retrieved on: 30 November 2019
EN Australian Faunal Directory [0524bb58-89d8-4d3b-acdf-c6f241a498bd]

ABRS (2009-2019): Australian Faunal Directory [https://biodiversity.org.au/afd/home], Australian Biological Resources Study, Canberra [as Architectonica Röding, 1798]
Data retrieved on: 13 February 2015

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