| Key | Key to the species of Praticolella. Characters follow the current (January 2006) literature as described in Pilsbry 1940, Hubricht 1983, Pilsbry 1903, Strebel 1873, von Martens 1892-1901, Emberton 1995. This taxonomy has been found to be incorrect and incomplete in parts by molecular data and the key should be used with this understanding and appropriate caution. |
|---|---|
| 1 | a. Shell globose, no apertural teeth. 2
b. Shell flattened, no apertural teeth. Shell pale brown may have a slight brownish band above periphery. Subgenus Eduardus, P. martensiana |
| 2 | a. Embryonic 1.5 whorls with any sculpture including spiral lines, spiral threads, or papillae. 3
b. Embryonic 1.5 whorls smooth. 5 |
| 3 | a. Embryonic whorls having raised spiral threads, Florida. 4
b. Embryonic whorl having lengthened papillae in irregular spiral series; last whorl somewhat contracted behind reflected lip; diameter 5-6 mm; NC, TN, AL, MS, GA. P. lawae |
| 4 | a. Outer lip not expanded, no furrow behind it; 6-9 mm. P. jejuna
b. Outer lip expanded or reflected, a furrow behind it; 10-11 mm. P. bakeri |
| 5 | a. TX & Mexico. Praticolella s.s. 6
b. AL & FL. uniformly cinnamon-buff colored. P. mobiliana |
| 6 | a. shell distinctly yellow, often with reddish-brown bands at periphery and opaque yellow markings. Eastern Mexico. 12-13 mm. P. flavescens
b. shell any other color: gray, white, brown, purple, banded or not. 7 |
| 7 | a. shell unbanded. 8
b. shell banded. 11 |
| 8 | a. Texas. 9
b. Mexico. 10 |
| 9 | a. Shell pale olive gray or brownish, subtranslucent, lip thickened within but without callous ridge. Some individuals with a narrow reddish band around periphery. Texas. P. pachyloma
b. Shell very white pigmented, first two whorls brownish gray, later whorls opaque-white, sometimes with a broad brownish-gray whorl above the periphery. No radial translucent streaks on base. Texas & N Mexico P. candida |
| 10 | a. Shell unbanded, globose, fawn-color, round aperture. Eastern Mexico, pale olive gray or brownish, subtranslucent, Veracruz. 13.5-15 mm. P. ampla
b. Shell unbanded, depressed, brown or pale corneus with a dull sheen so appears almost frosted, transversely elliptical aperture. Northern & Eastern Mexico, Nuevo Leon, Tamaulipas. 10-12 mm. P. strebeliana |
| 11 | a. Shell with single band. 12
b. Shell with multiple bands 13 |
| 12 | a. Shell brown or grayish with narrow reddish band, pale olive gray or brownish, subtranslucent, lip thickened within but without callous ridge. Texas. P. pachyloma |
| 13 | a. Lip white, narrow, not expanded, nor thickened. 8-13 mm. Texas, NE & E Mexico, N Guatemala W & Central Nicaragua, Introd. Florida. Shell conspicuously banded. P. griseola b. Lip white, expanded, strongly thickened. 14 |
| 14 | a. Shell predominately gray, nuclear whorl brownish gray, later whorls brownish gray, with narrow, opaque whitish band around periphery and sometimes white streaking above the periphery and could have broader whitish band below the suture. Lip expanded. 9.5-10.2 mm. S Texas & N Mexico P. trimatris b. Shell predominately white with banding or streaking. 15 |
| 15 | a. White pigment not uniform, always some degree of translucent steaks/bands on base. White or gray to light buff, usually with gray band above periphery usually additional bands or streaks. Lip white, narrowly expanded, strongly thickened (callused) within. 9-13 mm. Texas, NE, NW, E, W Mexico. P. berlandieriana b. Bands only, no radial lines or streaks on base. White sometimes with a translucent dilute-brown band above periphery and several on base. In some the brownish bands may be run together wholly or in part, sometimes bands translucent gray. Lip expanded, thickened within. 9.7-13.7 mm. South Texas and Northern Mexico. P. taeniata |
Last Modified 17 Oct 2006 | Contact: keperez"at"email.unc.edu