Gouldipoma trochleare (Pfeiffer, 1852)

Watters, G. Thomas, 2014, A revision of the Annulariidae of Central America (Gastropoda: Littorinoidea), Zootaxa 3878 (4), pp. 301-350 : 326-328

Gouldipoma trochleare (Pfeiffer, 1852)

Figure 7 A – K , 12 D

Type material. Cistula ? trochlearis Pfeiffer, 1852 : NHMUK 20140099 (3), specimens labeled in Pfeiffer’s handwriting, from Cuming collection, labeled “ Mexico,” probable syntypes (figs. 7 A, B). Chondropoma martensianum Pilsbry, 1900 : ANSP 63417 (1), lectotype, by SD of Pilsbry (1903); ANSP 252753 (3), paralectotypes; ZMB unnumbered (1),? paralectotype.

Type locality. Cistula ? trochlearis Pfeiffer, 1852 : none given [ NHMUK label reads “ Mexico ”] [“ Guadeloupe,” fide Pfeiffer, 1854b: 311 – 312]. Chondropoma martensianum Pilsbry, 1900 : “ Montañas de Poaná, Tabasco, Mexico.” [Poaná is an alternative name for Tacotalpa.]

Type figured. Cistula ? trochlearis Pfeiffer, 1852 : Pfeiffer, 1854a: pl. 41, figs. 7, 8. Chondropoma martensianum Pilsbry, 1900 : Pilsbry, 1903: pl. 52, figs. 4, 4a.

Chresonymy.

Cyclostoma trochlea Pfeiffer, 1851: 171 [non Benson, 1851, introduced in synonymy of Cistula ? trochlearis Pfeiffer, 1851 , and unavailable].

Cistula ? trochlearis Pfeiffer, 1851: 171 [nomen nudum].

Cistula ? trochlearis Pfeiffer, 1852a: 275 – 276; Pfeiffer, 1852c: 43; Pfeiffer, 1853a: 194; Solem, 1961: 209 – 211 [as nomen dubium]; Watters, 2006: 520 – 521; Thompson, 2011: 47 [doubtful occurrence in Central America].

Cistula trochleare (Pfeiffer, 1852) . Pfeiffer, 1852d: 68.

Cyclostoma trochleare (Pfeiffer, 1852) . Pfeiffer, 1854a: pl. 41, figs. 7, 8; Pfeiffer, 1854b: 311 – 312.

Cistula trochlearis Pfeiffer, 1852 . Adams & Adams, 1856: 294; Pfeiffer, 1857: 236; Pfeiffer, 1858: 135; Tristram, 1861: 232; Tristram, 1863: 412; Pfeiffer, 1865: 144; Bland, 1866: 61; Pfeiffer, 1876: 189; Fischer & Crosse, 1890: 184, 214 – 216.

Choanopoma trochleare (Pfeiffer, 1852) . Martens, 1890: 13 – 14.

Chondropoma martensianum Pilsbry, 1900: 139 – 140; Pilsbry, 1903: 780, pl. 52, figs. 4, 4a; Thompson, 1957: 100; Baker, 1964: 170; Thompson, 1967: 227; Richardson et al., 1991: 46; Watters, 2006: 349 –350.

Annularia (Annularia) trochlearis (Pfeiffer, 1852) . Henderson & Bartsch, 1921: 73.

Choanopoma (Choanopomops) martensianum ( Pilsbry, 1900) . Solem, 1961: 195, 197–198, 211, pl. 10, fig. 6, pl. 12, fig. 24f, map 1; Thompson, 2011: 46, 293.

Choanopoma martensianum ( Pilsbry, 1900) . Thompson, 1966: 27, figs. 2, 6 [operculum].

Halotudora martensiana ( Pilsbry, 1900) . Watters, 2006: 73, 349–350.

non Chondropoma trochleare (Pfeiffer, 1852) . Reeve, 1863b: pl. 11, fig. 82 [=? Chondropoma cordovanum Pfeiffer, 1857 ].

Distribution and habitat. This species is known only from mogotes, outcrops, and caves near Teapas and Talcotalpa, Tabasco State, in the foothills of the Central Highland facing the Tabasco Plain at 100– 120 m. It is found under limestone flakes and in cracks of limestone outcrops on talus slopes, cliffs, and ledges ( Thompson, 1957; Solem, 1961). Individuals may be locally abundant.

Conservation. No part of the known range of G. t ro c h l e a re appears to be protected.

Other material (specimens examined: 539). México: Tabasco State: GTW 13722a (1); UF 190709 (266), mogote 3.0 km E of Teapa, 120 m; UF 216382 (17), mogote 3.8 km E of Teapa; UF 19148 (44), mogote 3.9 km E of Teapa; UF 213709 (8), mogote #2 4.0 km E of Teapa; UF 191491 (37), 6.4 km W of Teapa; Grego coll. (4), UF 190730 (137), Grutas de Coconá 4.0 km ENE of Teapa, 100 m; UF 190678 (21), mogote 5.0 km SE of Tapijulapa, 110m; UF 19150 (5), mogote 14.8 km S of Tacotalpa.

Description. Shell conical, high-spired, thin. Smallest adult specimen seen 9.9 mm in length, largest 14.2 mm, average 12.4 mm (decollate). Protoconch usually lost in adult, 1.5 large, rounded, smooth whorls, tan on top, pale below, not clearly demarcated from teleoconch. Teleoconch of 3.5 – 5.25 rounded whorls. Umbilicus narrow, partially occluded by the outer lip. Spiral sculpture of numerous fine threads, ca. 40 on the final whorl, becoming stronger in the umbilicus. Axial sculpture of numerous fine, minutely crenulated, regularly spaced lamellae, varying from 70 – 90 on the final whorl. Suture strongly indented. Tufts absent but the axial lamellae may render the suture serrate. Aperture nearly circular. Inner lip smooth, narrowly exserted. Outer lip lamellate, reflected widely perpendicular to whorl, more or less evenly expanded, somewhat narrower facing umbilicus, fimbriated over the umbilicus, slightly auriculate posteriorly, adnate to previous whorl. Base color white to amber. Patterned with ca. 7 diffuse brown bands, sometimes broken into spots, umbilicus usually bounded by a single band, bands continuous over adapertural face of peristome, visible inside aperture. Operculum multispiral with a calcareous, erect but reflected lamella composed of numerous coarse recurved ridges. Radula and anatomy unknown.

Variation in specimens. Specimens vary primarily in background color and intensity of the color pattern.

Comparison with other species. This high-spired species is set apart from similar species ( G. chrysostiria , G. coltrorum , D. osberti , and D. rigidulum ) by the coarser, crenulate sculpture and fimbriated outer lip.

Remarks. Cistula ? trochlearis Pfeiffer, 1852 , was described without locality and illustrated by Pfeiffer in 1854. Solem (1961) commented on the confusion surrounding the date of publication and on which of two spellings of the specific name was correct. The illustration of “ trochleare ” by Reeve (1863b: pl. 11, fig. 82) is not this species but is probably P. cordovanus . Fischer & Crosse (1890) doubted the presence of the species in Central America. All of these reasons caused Solem (1961: 211) to state “The name trochlearis Pfeiffer, 1852 would have clear priority over martensianum Pilsbry, 1900 . The latter, however, is well figured, has a definite type locality and has been subsequently mentioned in the literature. The former’s type is unrecognized, it has a vague locality and has [not] been mentioned in the literature since 1890 and even then was listed as an unrecognizable name. I prefer to consider it a nomen dubium.” However, the specimens at NHMUK seem to be syntypes of Cistula trochlearis and are accompanied by a label stating “ Mexico ” (figs. 7 A, B). Whether Pilsbry’s illustration is better rendered than Pfeiffer’s is of no consequence, as is Reeve’s misidentification. Cistula trochlearis is clearly the same species as Chondropoma martensianum Pilsbry, 1900 , and is the senior synonym.

Original description (translated here from Latin): “Shell perforate, oblong-turret, truncate, ribs of spiral threads and longitudinal, slightly regular bars, not shining, pale brown, somewhat linearly variegated red dots; spire elongate, grooved, widely truncate; suture deep, simple; 5 very convex remaining whorls, front of last slightly solute; aperture vertical, subcircular; peristome double; inner scarcely extended, outer horizontally expanded, expanded above the recurved rostrum, briefly interrupted by the penultimate whorl, left margin incisedcrenulated.—Operculum?” 14 mm length.

Etymology. Cistula ? trochlearis Pfeiffer, 1852 : L. trochlea , block and tackle [grooved]. Chondropoma martensianum Pilsbry, 1900 : Karl Eduard von Martens (1831–1904), German conchologist at Museum für Naturkunde, Berlin.

Figures

FIGURE 7 A – K. Gouldipoma trochleare (Pfeiffer, 1852). A. NHMUK 20140099, probable syntype, ca. 14 mm. B. NHMUK 20140099, probable syntype, ca. 13 mm, both photos courtesy of J. Ablett (NHMUK). C – D. Chondropoma martensianum Pilsbry, 1900, ANSP 63417, lectotype, ca. 13 mm, photo courtesy of ANSP. E – F. UF 213709, 13.5 mm. G. UF 190678, 11.6 mm. H. UF 216382, 13.1 mm. I. GTW 13722 a, 10.3 mm. J – K. Grego coll., 12.0 mm. FIGURE 7 L – W. Tudorisca andrewsae (Ancey, 1886). L – M. UF 19125, 9.0 mm. N. UF 19127, 9.6 mm. O. UF 19125, 8.4 mm. P. UF 224415, 8.5 mm. Q. UF 224415, 7.6 mm. R. UF 242669, 12.5 mm. S. UF 242669, 10.9 mm. T. Choanopoma andrewsae roatanense Richards, 1938, FMNH 90606, paratype, 17.0 mm, photo courtesy of J. Gerber (FMNH). U. UF 19132, 9.9 mm. V. UF 19132, 9.9 mm. W. UF 19130, 11.3 mm.

FIGURE 12 A – D. Distribution maps. A. Choanopomops largillierti (Pfeiffer, 1846) (black); Parachondria rubicundus (Morelet, 1849) (red); Parachondria cordovanus Pfeiffer, 1857 (blue); Paridoxipoma enigmaticum new species (white). B. Halotudora sumichrasti (Crosse & Fischer, 1874) (blue); Halotudora gaigei (Bequaert & Clench, 1931) (black); Diplopoma osberti (Tristram, 1861) (red); Halotudora gruneri (Pfeiffer, 1846) (white). C. Gouldipoma chiapasense (Crosse & Fischer, 1877) (red); Diplopoma rigidulum (Morelet, 1851) (black); Tudorisca andrewsae (Ancey, 1886) (blue); Gouldipoma coltrorum new species (white); Gouldipoma thomasi (Solem, 1961) (purple). D. Gouldipoma trochlearis (Pfeiffer, 1852) (red); Halotudora kuesteri (Pfeiffer, 1852) (black); Gouldipoma terecostatum (Thompson, 1966) (blue); Gouldipoma chrysostiria new species (purple); Gouldipoma callipeplum (Solem, 1961) (white).