Cerodrillia perryae Bartsch & Rehder, 1939

Fallon, Phillip J., 2016, Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species, Zootaxa 4090 (1), pp. 1-363: 75

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http://doi.org/10.11646/zootaxa.4090.1.1

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scientific name

Cerodrillia perryae Bartsch & Rehder, 1939
status

 

Cerodrillia perryae Bartsch & Rehder, 1939 

( Plate 31View PLATE 31)

Cerodrillia (Cerodrillia) perryae Bartsch & Rehder, 1939: 128  , pl. 17, fig. 1: Perry (1940: 164, pl. 38, fig. 260 A). Cerodrillia perryae Bartsch & Rehder, 1939  : Perry & Schwengel (1955: 182, pl. 38, fig. 260 A); Powell (1966: 74); Lyons et al. (1971: 14); Abbott (1974: 271, fig. 3022); Kaicher (1984: card 3901); Turgeon et al. (1988: 96); Turgeon et al. (1998: 102); Williams (2005; 2009: 1524, left photograph pair only).

Not this species or unconfirmed extralimital reports.

Cerodrillia perryae Bartsch & Rehder, 1939  : Porter (1974: 246 [North Carolina]); Sander & Lalli (1982: 317 [off Barbados]); Vokes & Vokes (1984: 58, pl. 21, fig. 5 [Campeche and Yucatan, Mexico]); Rios (1985: 138, pl. 47, fig. 630 [off Amapá, Brazil]); Jong & Coomans (1988: 112 [ Curaçao likely = Douglassia antillensis  , new sp.]); Díaz et al. (1990: 196 [Santa Marta area, Colombia]); Leal (1991: 183; pl. 23, figs. D –F [from off Amapá to Espirito Santo; seamount archipelago]); Díaz (1994: 40 [Tayrona National Park, Colombia]); Díaz & Puyana (1994: 225, pl. 67, fig. 889 [Santa Marta area, Colombia]); Rios (1994: 160, pl. 53, fig. 716 [Amapá to Espirito Santo; seamounts, Brazil]); Lee (2003 [Peanut I., Palm Beach Co., E Florida]); de Barros (2005: 146, fig. 1 q [Piedade, Brazil]); Williams (2005; 2009: 1524 [right photo pair; = D. antillensis  , new species and Cerodrillia  sp.(undescribed)]); García (2007: 8 [Campeche Bay]); Daccarett & Bossio (2011: 129, fig. 782 [ Colombia; figure not of C. perryae  ]).

Type. Holotype 12.7 x 4.8 mm (USNM 508644).

Type locality. Sanibel I., W Florida.

Other material examined. An additional 23 specimens were examined: W Florida: 1 spec., 10.9 x 4.2 mm, in 1.8 m, Homosassa, Citrus Co. (H.G. Lee coll.); 5 spec., 10.3 x 3.8, 9.1 x 3.5, 8.7 x 3.1 8.8 x 3.3 & 7.8 x 3.3 mm, in 2.4–3 m, 8 km off Bayport, Hernando Co., D. Steger! (UF 242585). Florida Keys: 4 spec., the 2 best: 8.2 x 3.1 & 10.0 x 4.0 mm, Grassy Key, Marathon, J.S. Raybon! (ANSP 89627); 1 spec., 8.8 x 3.6 mm, in 2.4 m, Bay side, Key Vaca (EFG 28303); 1 spec., 13.3 x 5.2 mm, off Key West (author’s coll.); 2 spec., 10.4 x 4.3 & 6.6 x 3.1 mm, in 1– 2 m, N side of Bird Key, near Big Pine Key (USNM 900121); 3 spec., 9.4 x 3.9, 10.1 x 3.6 & 12.0 x 4.5 mm, in 1 m, Layton, NW edge of Long Key, P. Poland! 30 Apr 1996 (H.G. Lee coll.). 5 spec., 7.1 x 3.2, 9.0 x 3.5, 9.5 x 3.9, 9.2 x 3.7 & 9.8 x 4.1 mm, behind Lime Tree Bay Resort, NW edge of Long Key, P. Poland! 6 Oct 1995 (M. Krisberg coll.). E Florida: 1 spec., 9.2 x 3.7 mm, in drift, John U. Lloyd State Park, Dania, Broward Co., J. Chesler! Jan 2003 (H.G. Lee coll.).

Range and habitat. W Florida (Hernando Co.; Citrus Co.; Lee Co.); Florida Keys; E Florida (Broward Co.). Depths of 1–13 m have been reported for confirmed specimens.

Description. Shell small (to 13.3 mm) with a smooth waxy surface, shape fusiform, truncated anteriorly; whorls to about 8 total, convex, their peripheries slightly below mid-whorl, variably rounded to angular, the last approximately 60 % of total shell length. Protoconch of 2 smooth glossy round whorls. Axial sculpture of strong ribs that extend from suture-to-suture on spire whorls, and evanesce just below periphery of last whorl. Ribs narrow on shoulder, broadest at whorl periphery; 6–8 present on the penultimate, and 6–7 to the varix on the last whorl. Rib interspaces much wider than ribs; microscopic growth striae are present on the shell surface. Varix strong, cup handle-like, located immediately behind the anal sinus about ¼-turn from the edge of the outer lip. When viewed ventrally, shell profile appears quite lopsided. Spiral sculpture mostly absent except for about 4 weak threads on shell base, and 5–7 much stronger ones on anterior fasciole. Sulcus absent, ribs are lower and narrower on whorl shoulders and slightly curved marking the past positions of the anal sinus. Outer lip thin, flat, jutting out from along the base of the varix; lip sometimes strengthened by an axial fold below the anal sinus; edge of lip forms a low arc from the sinus to the anterior canal with only a slight invagination for a stromboid notch. Anal sinus a deep U-shaped notch on whorl shoulder, entrance not constricted. Inner lip thin, recumbent except pinched up anteriorly along the columella, thinnest on parietal wall and developed into a lobe at its junction with the outer lip. Anterior canal short but well defined, open, unnotched. Anterior fasciole not swollen. Color white to off white with a broad central color band that may be distinct at its margins or diffuse, covering the top half of the whorl, light golden to brown in color, or absent altogether; rib crests lighter.

Remarks. Taxonomy. Cerodrillia perryae  is one of two species placed in the genus at the time it was erected by Bartsch & Rehder. It exhibits the following important generic characteristics: axial ribs that extend from sutureto-suture, microsculpture limited to the shell base, spiral threads on anterior fasciole, and a cup-handle-like varix. Variability. The specimen depicted in Pl. 31, Fig. 12 is similar in most respects to the holotype, but has a more developed lip and a fresher color. Other specimens depicted in the plate illustrate the range of color patterning. An all-white specimen is shown in Fig. 9 of the plate. The average total length of 22 specimens is 9.59 mm (6.6–13.3 mm); and their average W/ L ratio  is 0.397, which is relatively slender compared to most other species in the genus. Identification. Cerodrillia perryae  is most easily distinguished from C. clappi  by its larger size, fewer ribs (6–8 versus 9 on the penultimate whorl), and by the presence of a golden-brown mid-whorl band. Douglassia antillensis  , new species, which it closely resembles, including the presence of a mid-whorl band, differs in having a protoconch with more whorls (2 ½– 2 ¾ versus 1 ¾– 2), and in being stouter, with a W/ L ratio  of 0.449. The original characterization of C. perryae  as flesh-colored with a golden-brown band (Bartsch & Rehder, 1939) has probably led to widespread reporting of the species well beyond its range, including Colombia, Netherlands Antilles, and Brazil. Most of the extralimital reports do not have good accompanying photographs, but those that do are illustrations of D. antillensis  . The occurrence of D. antillensis  at localities considered out of range for C. perryae  has been confirmed through the examination of other available specimens. Ironically, C. perryae  does not always have a band, as described by Bartsch & Rehder, but may be all-white, or more irregularly patterned. Specimens of D. antillensis  are more consistently patterned over most of its range.