Parachondria (Chondropomorus) coroni ( Bartsch, 1946 )

Watters, G. Thomas, 2016, Review of the Hispaniolan Parachondria (Chondropomorus) complex (Gastropoda: Littorinoidea: Annulariidae), Zootaxa 4127 (2), pp. 245-275 : 251-252

Parachondria (Chondropomorus) coroni ( Bartsch, 1946)

Figures 1 X–AE, 5 A

Type material. NMNH 493320, holotype.

Type locality. “San Marc, Haiti.”

Type figured. Bartsch, 1946: pl. 3, fig. 7.

Chresonymy. Chondropoma (Chondropomorus) coroni Bartsch, 1946: 17 –18, pl. 3, fig. 7; Ruhoff, 1973: 57; Watters, 2006: 217.

Parachondria (Parachondria) coroni ( Bartsch, 1946) . Watters, 2006: 46, 217.

Distribution and habitat. This species occurs from the south-western face of the Chaîne des Matheux at ca. 300–500 m into the southern foothills of the Chaîne du Trou d'Eau facing the Plain du Cul-de-Sac between the lakes Azuei and Trou Caiman. Specimens examined here from the region of Petit-Goâve seem to be this species as well. If so, then this species ranges west to the north coast of the Tiburon Peninsula. This would be the only record of this group from the Tiburon Peninsula. But as with all Haitian species covered here, the actual ranges may be significantly greater than recorded. Haitian records are few, usually from only a handful of often visited sites (e.g., Citadelle Laferrière), or are simply listed as “ Haiti ” without further refinement.

Material examined (27 specimens). Haiti. UF 33282(6), 9 km E of Petit-Goâve, Départment de l’Ouest; UF 32051(16), 520 m, 25 km SSW of Mirebalais, Départment de l’Ouest; UF 32869(5), 280 m, 9 km NE of Dufailly, Départment de l’Ouest [not found].

Redescription. Shell thin but opaque, high-spired, elongate conic. Maximum adult size: 19.2 mm, nondecollate. Minimum adult size: 12.9 mm, non-decollate. Adult shell often not decollated. Protoconch of 1.5 minute, smooth whorls, pale tan with dark brown band at suture, demarcation between protoconch and teleoconch not welldefined. Teleoconch of 5.5 whorls. Axial sculpture of final whorl of numerous (ca. 80–100) irregular, narrow threads and wider, low cords. Shell with regularly spaced growth stoppage marks, axial threads preceding marks often microscopic and densely packed. Spiral sculpture of final whorl of ca. 30 low, indistinct cords, obsolete below suture and on base. Overall sculpture not distinct giving surface a smudged but weakly fenestrate appearance. Umbilicus bounded by one or two distinct cords, smooth within. Suture not channeled. Blunt tufts composed of 1–3 slightly enlarged axial threads, separated by 1–3 non-enlarged axial elements. Aperture oval, lip double, rarely single. Inner lip exserted or fused to outer lip and nearly obsolete. Outer lip narrowly expanded, narrower facing umbilicus, narrowly separated from previous whorl. Low, wide, slightly concave posterior auricle present. Color pattern complex and variable. Base color white or tan. Smudged tan axial zig-zags overlain with widely spaced darker dots that continue as brown bands on both sides of outer and inner lips. At least one continuous or interrupted brown band bounding umbilicus. Widely spaced dark patches at suture. Tufts white. Operculum lacking in all specimens examined.

Variation in specimens. The sculpture varies in strength in the few specimens seen. The strength of the inner lip varies from well-developed to nearly obsolete.

Comparison with other species. This is a large, pale species. It resembles a high-spired P. daedalus but that species has much finer sculpture (170–200 axial threads in P. daedalus vs. 80–100 in P. c o ro ni; 30–40 spiral threads in P. daedalus vs. ca. 30 in P. co ro ni).

Original descriptions. See Bartsch (1946: 17–18).

Etymology. Unknown.

Figures

FIGURE 1. A – H. Parachondria (Chondropomorus) anatolensis new species. A, B. UF 216728, holotype, 14.6 mm. C. UF 216728, paratype 1, 14.4 mm. D. UF 216728, paratype 2, 14.4 mm. E. UF 216728, paratype 3, 12.3 mm. F. UF 216728, paratype 4, 11.8 mm. G. UF 216728, holotype, detail of spire. H. UF 216728, holotype, detail of suture.