As Ocinebrina aciculata exilis (Houart, 2001)

Shell of medium size for the genus, H up to 14.2 mm at maturity, slender and lanceolate. Protoconch paucispiral of 1.5-1.75 rounded whorls, globose, apparently smooth but with weak, low, spiral threads. Teleoconch uniformly light tan, yellow-tan or pale brown, usually of 5 convex whorls at maturity, strongly elongate and weakly convex, with the last whorl consisting of about 1/2 of total height in adult specimens. Subsutural ramp rounded with impressed suture. Spiral sculpture in the convex part of the whorl consisting of 6 low, weakly squamose and rounded primary cords and approximately equally sized secondary cords, and occasionally smaller threads. P1 and P2 start in the early teleoconch with P1 always weak and low. IP starts on the second whorl, soon followed by si, s2 and abis. Axial sculpture consisting of low, weak, broad, rounded ribs: 15-16 on the first whorl; 13-17 on the second whorl; 12-15 on the third whorl; 14 on the fourth whorl; 9-11 on the last whorl. Outer lip weakly crenulate and with 5 weak internal denticles (some could appear double), and with an occasional labral tooth, formed by the extension of P4. Labral varix low, shallow, delicate. Columellar lip flaring, smooth; rim partially erect, adherent at adapical extremity. Aperture pale, moderately large and ovate. Siphonal canal short, narrow, straight, ventrally sealed. Animal reddish, with sparse whitish or yellowish speckles. Operculum corneous, brown, D-shaped/ovate, with subterminal nucleus, surrounded by concentric ridges. Radula typical of Ocenebrinae, with sickle-shaped lateral teeth with a broad base, rachidian bearing elongate, but quite thick, central and lateral cups with an elongate inner lateral denticle on base. Marginal area with short denticles and a thick marginal cusp.

December 15, 1912 is the date of publication of O. corallinoides as reported into the original frontispiece, and not 1910 or 1920 as erroneously reported elsewhere (see Bonomolo and Buzzurro 2006, Cecalupo etal. 2008, Bank and Menkhorst 2009). This taxon was then reported and illustrated as subspecies of O. aciculata by Nordsieck (1968), who assigned it to Monterosato, following Pallary (1912), who probably referred to a name in Monterosato's manuscript. In the last revision of the European Muricidae, this taxon was rediscovered and described as O. aciculata exilis Houart, 2001 (see Houart 2001). Because of the reported co-occurrence of specimens of O. aciculata (Lamarck, 1822) in the Gulf of Gabes (Pallary 1912; Cecalupo et al. 2008) and to its peculiar morphological and radular features, O. aciculata exilis was raised to species level and then synonymized with Ocinebrina corallinoides Pallary, 1912 (Bonomolo and Buzzurro 2006; Cecalupo et al. 2008). Finally, Cecalupo and Mariani (in Cecalupo et al. 2008) described O. buzzurroi, from Sfax, which was evidently based on juveniles of O. corallinoides. The reported diagnostic features are mostly size-related (smaller size, fewer whorls), the results of miscounting (more numerous axial ribs), or within the range of variation of O. corallinoides (stronger P4, ending with a labral tooth, thicker shell).

Currently known only from the Gulf of Gabes (Tunisia) (Pallary 1912, Houart 2001, Cecalupo et al. 2008).