Conorbis dormitor, from here.

Belongs within: Conoidea.

The Conorbidae is a group of conoid gastropods of uncertain monophyly, but in which many species exhibit a degree of resorption of the inner shell wall (Bouchet et al. 2011).

Characters (from Bouchet et al. 2011, quoting Tucker & Tenorio 2009): Shell squatly conical to elongated or biconical; interior of shell extensively remodelled including columellar region; nodules absent but cords may be present. Radular tooth with anterior fold usually present; basal spur directed toward apex of tooth or parallel with tooth base; waist, base and C-fold absent; terminating cusps, serratins and accessory process also absent.

<==Conorbidae [Conorbinae]
    |--Benthofascis Iredale 1936 P66
    |    |--*B. biconica (Hedley 1903) [=Bathytoma biconica] P66
    |    |--B. lozoueti Sysoev & Bouchet 2001 BK11
    |    `--B. sarcinula (Hedley 1905) [=Bathytoma sarcinula] P66
    |--Conorbis Swainson 1840 P66
    |    |--*C. dormitor (Solander 1766) [=Conus dormitor] P66
    |    |--C. aequipartitus Cossmann 1889 P66
    |    |--C. alatus (Edwards 1856) [=Conus alatus] P66
    |    |--C. amphiconus (Sowerby 1850) [=Pleurotoma amphiconus] P66
    |    |--C. atractoides (Tate 1890) P66
    |    |--C. bhagothorensis Vredenburg 1925 P66
    |    |--‘Pleurotoma’ conoides Conrad 1835 [incl. Conorbis conradi Gregorio 1890] P66
    |    |--C. macnairyensis Wade 1917 P66
    |    |--C. marginata (Lamarck 1804) [=Pleurotoma marginata] P66
    |    |--C. procerus Beyrich 1853 P66
    |    |--C. sindiensis Vredenburg 1925 P66
    |    |--C. subangulata (Deshayes 1834) [=Pleurotoma subangulata] P66
    |    `--C. umbgrovei Martin 1931 P66
    `--Artemidiconus da Motta 1991 BK11

*Type species of generic name indicated


[BK11] Bouchet, P., Y. I. Kantor, A. Sysoev & N. Puillandre. 2011. A new operational classification of the Conoidea (Gastropoda). Journal of Molluscan Studies 77: 273–308.

[P66] Powell, A. W. B. 1966. The molluscan families Speightiidae and Turridae: an evaluation of the valid taxa, both Recent and fossil, with lists of characteristic species. Bulletin of the Auckland Institute and Museum 5: 1–184, pls 1–23.

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