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Conus inesae (Monteiro, Afonso, Tenorio, Rosado & Pirinhas, 2014)

říše Animalia - živočichové »  kmen Mollusca - měkkýši »  třída Gastropoda - plži »  řád Neogastropoda »  čeleď Conidae »  rod Conus - homolice »  podrod Lautoconus

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Conus inesae

Autor: Monteiro, A. et al.

Conus inesae

Autor: Monteiro, A. et al.

Taxon v check-listech zemí*

* Výčet zemí nemusí být kompletní

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Popis

Description of the shell: Morphometric parameters: L = 25 - 36 mm; average L = 30.3 mm; RD = 0.59 - 0.63; RSH = 0.10 -0.16; PMD = 0.81-0.85. : Holotype: 31.0 x 16.7 mm
Shell moderately small, solid. Last whorl ventricosely conical, elongated. Profile more or less straight, rounded shoulder. Spire low to moderately high, slightly convex, teleoconch whorls smooth; protoconch and first whorls typically eroded. Last whorl smooth, often with visible marks of previous lips. Periostracum yellow. The shell is usually light brown to brown but dirty white and dark brown shells are known; usually the brown color is not uniform, forming spiral bands or lines of different hues; in some cases these spiral bands can be almost white. The spiral ramps are of the same color as the last whorl of the teleoconch, sometimes somewhat lighter, except near the suture. The interior of the aperture is violet, fading towards the anterior end; the interior of the lip is white. The operculum is small, elongated.
Living animal and radula: The living animal is dark red. Radular tooth examined for the holotype. 26 teeth in radular sac. Radular tooth slender, medium-sized (LC/DR = 50) with the anterior section longer than the half of the total tooth length (DR/PA = 1.90 - 1.95). Waist evident. Blade almost indistinctive, covering most of the anterior part (100F/ PA = 75 - 80 %). 34 to 38 sharp denticles present in serration, arranged in one row in the apical portion, becoming 2 to 3 rows below, ending in a rounded terminating cusp. Basal spur present.
Monteiro et al., 2014. New data on the endemic cones (Gastropoda, Conidae) of Angola, with the description of new species.

Možné záměny

V. inesae sp. nov. is quite variable in color, but the constant shell shape leads us to consider all studied variations as conspecific. Darker brown specimens of the new species may resemble V franciscoi (Rolan & Rockel, 2000) in some ways. However, the body whorl of the latter usually shows a broad central band consisting of white blotches instead of spiral bands or lines of different hues as seen in V inesae sp. nov. The shells of V.franciscoi and V. inesae sp. nov. also differ in shell shape (RD and PMD; see morphometric parameters for these and other taxa in Table 1). The elongated radular teeth of both V. inesae sp. nov. and V. franciscoi are similar. Both of them exhibit an anterior section that is longer than the half of the tooth length, but they differ in the number of teeth present in the radular sac as well as in the extent of the anterior section which is covered by blade (100F/PA = 60 in V. franciscoi). Furthermore, the denticles in the serration of V. inesae sp. nov. are arranged in multiple rows, but in a single row in V. franciscoi. The radular tooth of V. inesae sp. nov. also resembles that of V. babaensis (Rolan & Rockel, 2001) but again teeth are more numerous in the radular sac of this species (48 to 78 teeth), and the denticles in the serration are arranged in a single row. The shell of V. babaensis is more ovate than that of V inesae sp. nov., and its characteristic pattern of wide brown spiral bands on a white background allows immediate separation between the two species. The more ovate shell shape, coloration and the absence of fine spiral lines on the body whorl distinguish V. inesae sp. nov. from V. flavusalbus (Rolan & Rockel, 2000) . The latter has also a different radular tooth morphology , which essentially differs from V. inesae sp. nov. in having an anterior part shorter than the posterior part (DR/PA = 2.1 - 2.3), and less denticles on the serration (d in S = 15 - 18). V. filmeri may appear somewhat similar in external morphology, especially when compared with the lighter dirty white morphotypes of V. inesae sp. nov., but the latter is much more slender in shape (smaller RD and more elevated PMD), has a tighter aperture,
Monteiro et al., 2014. New data on the endemic cones (Gastropoda, Conidae) of Angola, with the description of new species.

Rozšíření

Type locality: Cabo Santa Marta in the Namibe Province, Angola, Southern Angola, West Africa
Distribution and habitat: The new species is found at Capins and Cabo Santa Marta, where it is more abundant. It also occurs, in lesser densities, at Bafa do Calongo, Sao Nicolau and Piscinas; it is also found along the Namibe Province in southern Angola. V. inesae sp. nov. is found from 3 to 12 meters deep usually on top of rock slabs or half buried in rock fissures, in rough waters. It has been observed in sympatry with several other endemic Varioconus species but mainly V cf. bulbus (Reeve, 1843), V chytreus (Tryon, 1884), V. variegatus (Kiener, 1845) and V. zebroides (Kiener, 1845).
Monteiro et al., 2014. New data on the endemic cones (Gastropoda, Conidae) of Angola, with the description of new species.

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