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Calliotropis (Otukaia) delli new species
Figures 13-15



DESCRIPTION. Shell large, thin, silky white, nonumbilicate, spire whorls convex. Protoconch of one and one-fourth whorls, teleoconch whorls seven, first teleoconch whorl with three spiral cords, noded to produce square cancellations: sculpture chang­ing by the second whorl to three prominently projecting spiral cords, the uppermost cord beaded, the other two smooth. Mature sculpture of three prominent cords, subsutural cord the least prominent, remaining close to the suture and losing its beading by about the third whorl; second cord sharply defined and sepa­rated from the subsutural cord by a broad, smooth area; third cord equally strong and projecting to form the peripheral extent of the whorl. Basal keep sharp; suture laid directly on its lower surface, not forming a channel. Basal cording of about three fine cords on the outer edge and two to three bordering the columellar wall; intermediate area of base smooth except for fine spiral striae. Columellar wall thickened, slanted, forming a spur at the base; outer lip thin. Operculum corneous, multispiral. Animal and radula as in C. chilena.


Dimensions: height 29.6 mm. diameter 30.9 min (holotype, Fig. 13): height 24.3 mm, diameter 23.2 mm (paratype, Fig. 14); height 29.0 mm, diameter 26.0 (paratype. Fig. 15).


MATERIAL. Chile: Los Vilos (LACM, type lot, Figs. 13-15), Papudo, Zapallar, Algarrobo, Punta Penablanca (LACM), Pichilemu, Constitución. Specimens examined: 114.


TYPE MATERIAL. Thirty-three specimens from the type lo­cality, collected 29 May 1977, by Andrade, shrimp trawler GODEN WIND, Holotype, LACM 1980; paratypes, LACM 1981; paratypes, MNHN 200489; paratypes, MZICB 15.528; paratypes, USNM 784738.


TYPE LOCALITY. 400 m off Los Vilos, Chile (31°56'S: 71°54'W).


DISTRIBUTION. Los Vilos (31°56'S) to Constitución, Chile (35°20'S). Depth range 200-450 m.


DIAGNOSIS. A species of the subgenus Otukaia characterized by having three spiral cords prominent at all growth stages. It differs from the similarly sculptured C. blacki (Dell, 1956) from New Zealand (see Dell, 1956: 46, pl. 7, fig. 6) in being lower spired, and in having a weaker subsutural (first) cord and a stronger second cord.


REMARKS. Calliostoma delli tends to be broader than high; one of the figured paratypes (Fig. 14) is unusually narrow, compared to most specimens on the type lot.


ETYMOLOGY. We are pleased to name this species in honor of Dr. Richard K. Dell of the National Museum of New Zealand, Wellington.”




(McLean & Andrade, 1982: 7-8)


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© National Museum of Natural History, Smithsonian Institution

Source: Antarctic Invertebrates Website (NMNH)

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