Typhlosyrinx panamica, Bouchet & Sysoev, 2001

Bouchet, P. & Sysoev, A., 2001, Typhlosyrinx - like tropical deep-water turriform gastropods (Mollusca, Gastropoda, Conoidea), Journal of Natural History 35 (11), pp. 1693-1715 : 1702

Typhlosyrinx panamica n. sp.

(figures 27–29)

Type material. Holotype and two paratypes (all dd) in ZMC.

Type locality. Gulf of Panama, 07°15'N, 79°25'W, 915 m [ Galathea sta. 745 ].

Material examined. Only known from the type material.

Distribution. Gulf of Panama, shells in 915 m.

Description. Holotype (figure 27). Shell thin, fragile, rather broad, spire occupying ca 35% of total shell height. Apex (protoconch and fi rst teleoconch whorls) dissolved, remaining whorls five, suture very shallow. F irst two remaining whorls with axial sculpture, weakly angulated in the middle, concave adapically; last three whorls without axial ribs, with almost fl at pro fi le, with very weak subsutural fold. Axial sculpture consisting of ribs and incremental lines, subsuturally forming weakly thickened wrinkles, especially on early whorls. Axial ribs strong, narrow, opisthocline, slightly nodulose, commencing just above periphery and reaching suture abapically, 11 ribs on last axially sculptured whorl. One or two subsutural spiral cords, sinus area smooth, rest of whorl covered by numerous, wavy, fl at spiral cords, broader and with narrow interspaces on base, narrower on canal. Base evenly convex. Aperture oval, inner lip covered by wide callus, forming irregular nodules inside aperture, columella straight. Anal sinus moderately deep, with strongly projecting outer lip judging from growth lines (deformed behind peristome due to damage and repair). Canal short, straight. Colour yellowish white.

Dimensions: shell height 29.1 mm, last whorl height 20.5 mm, aperture height 16.3 mm, diameter 12.1 mm.

Paratypes (28.3 ✕11.4 mm and 15.3 ✕7.4 mm; figures 28, 29) differ in having slightly more convex spire whorls.

Remarks. Typhlosyrinx panamica ressembles T. praecipua , and differs from it in having a much stronger spiral sculpture and in the axial ribs being con fi ned to the earlier spire whorls only. This is the fi rst species of Typhlosyrinx from outside the Indo-Paci fi c.

Etymology. Named after the region of collection.