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Comparing the Nipe-Sagua-Baracoa massif with<br />

the Sierra de los Órganos mountain range, the<br />

former outnumbers the latter in families (26), a<br />

fact that is based on geomorphologic and flora<br />

characteristics.<br />

Both areas have equal number of genera (64);<br />

however, the Sierra de los Órganos exhibits a<br />

larger number of species (230).<br />

Most of the land mollusks in Cuba are located<br />

in the mountains, given that distribution patterns<br />

are based on a combination of factors such as<br />

shade, humidity, shady or sunny slopes, particular<br />

topography, soils and different plant formations,<br />

which lead to the isolation of the populations.<br />

Large geographic areas with a high diversity<br />

of microhabitats, and rugged ground under the<br />

effects of shade and rain provided multiple conditions<br />

in the mountainous areas of Cuba for the<br />

emergence of ecological niches where, inexorably,<br />

events of speciation occurred which favored<br />

the vast diversity of our malacological fauna.<br />

© Adrián González Guillén<br />

� Glyptemoda torrei freirei.<br />

�<br />

Los Negros, Jiguaní, Santiago de Cuba.<br />

En Cuba, la mayoría de las especies de moluscos<br />

terrestres se localizan en las montañas, ya que los<br />

modelos de distribución se deben a la combinación<br />

de factores como sombra, humedad, pendientes<br />

expuestas o sombreadas, suelos y diferentes formaciones<br />

vegetales que provocan el aislamiento de las<br />

poblaciones.<br />

Áreas con una amplia extensión geográfica, alta<br />

diversidad de microhábitats, topografía accidentada<br />

bajo el efecto especial de las condiciones de sombra<br />

y lluvia ofrecieron en las zonas montañosas de Cuba<br />

múltiples condiciones para el surgimiento de nichos<br />

ecológicos donde, inexorablemente, ocurrieron eventos<br />

de especiación que propiciaron la vasta diversidad<br />

de nuestra fauna malacológica.<br />

Liguus fasciatus torrei. South coastal zone of Guanahacabibes.<br />

Liguus fasciatus torrei. Zona costera sur de Guanahacabibes.<br />

�<br />

Veronicella Tenax.<br />

Hoyo de los Helechos, San Carlos, Pinar del Río.<br />

Polymita venusta. Las Calabazas, Holguín.<br />

78 79<br />

© Adrián González Guillén

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