Page 30 - Land Snails of New Mexico

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9b
10a
10b
11a
11b
12a
12b
13a
13b
14a
14b
15a
15b
Shelldepressed,matureshell12mm orlessinheight,bodywhorlcarinateorangularperipherally ..................10
Shell with several distinctive, strongly developed spiral ridges (lirae), species of Mineral Creek drainage inthenorthernBlackRange ........................................................Oreohelixpilsbryi(p.42)
*********************************************** Shell without strongly developed spiral ridges .............. 11
Shell carinate and with strongly developed growth ridges, pigmentation varied, whitish to brownish
( b r o w n b l o t c h e s o r b a n d s m a y b e p r e s e n t ) . . . . . . . . . . . . s u b s p e c i e s o f O r e o h e l i x m e t c a l f e i o f t h e m a i n B l a c k R a n g e (p. 4 3 )
Shell angular and relatively smooth, a brownish band consistently present: subspecies of Oreohelix metcalfei ofthenortheasternfoothillsoftheBlackRange ................ O. m. hermosensis (p.43) and O. m. cuchillensis(p.44)
SpeciesofSocorroandCatronCounties .................................................................13
Species of Grant and Luna Counties. .................................................................... 1 4
A speciesoftheMagdalenaMountains,matureshellsca.16mm orlessinwidth,freshshellslightbrown withdark-brownbands ........................................................Oreohelixmagdalenae(p.45)
A speciesofthesouthernmarginoftheSanAgustinPlains,matureshellsover16mm inwidth,
someover20mm, freshshellsverylightbrownwithtannishbands.........................Oreohelixlitoralis(p.45)
A speciesoftheeasternPinosAltosMountains,GrantCo.,shellmoderatelydepressedand
weaklykeeledperipherally ...................................................... Oreohelixconfragosa(p.45)
S p e c i e s o f t h e F l o r i d a a n d T r e s H e r m a n a s M o u n t a i n s a n d t h e S i e r r a R i c a , p r o b a b l y e x t i n c t i n all t h r e e r a n g e s , shellmoderatelyelevated,angularperipherally ..........................................Oreohelixflorida(p.45)
Shellmoderatelyelevated,roundedtomoderatelyangularperipherally,noliraepresent
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Radiocentrumhachetanum(p.47)
Shellmoderatelydepressed,carinateperipherallywithtopoftheprominentkeelstillevidentasstrongridge bordering older whorls peripherally, 2 or 3 spiral ridges (lirae) usually present on body whorl below keel
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Radiocentrumferrissi(p.47) Helminthoglyptidae
With theirsingle,spiral,brown bandon a shell background of lighter color, shells of species and subspecies in the genus Sonorella greatlyresembleeachother.Taxonomicdiscriminationrequiresdissectionandstudyoffeaturesofthegenitalia.The keybelowisbased
solelyon geographic distribution.
-
la
1b
2a
2b
Species from east of the Rio Grande Valley ................................................................ 2
SpeciesfromwestoftheRioGrandeValley ...............................................................3
A speciesoftheDoñaAnaMountains,DoñaAnaCo. ................................... Sonorellatodseni(p.62) A speciesoftheOrgan,SanAndres,andOscuraMountains ..............................Sonorellaorientis(p.62)
Itispossible that a population of S. metcalfi, a species of the Franklin Mountains, El Paso Co., Texas, occurs in the southernmost foothills of the Organ Mountains.
3a SpeciesoftheAnimasMountains,southernHidalgoCo. .............................Sonorellaanimasensis(p.62)