LAS ESPECIES DEL GÉNERO AXONOPUS (POACEAE: PANICOIDEAE: PASPALEAE) EN MÉXICO

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Abstract

Axonopus P. Beauv. es un género nativo del continente americano, del que se conocen unas 71 especies, principalmente concentradas en el norte de Sudamérica, con algunos representantes aparentemente introducidos en el Viejo Mundo. Se presenta el estudio taxonómico sinóptico de las especies mexicanas, sus sinónimos, su distribución geográfica y ecológica, y se comentan algunas particularidades morfológicas, así como relaciones morfológicas de las especies. Se discuten las afinidades morfológicas con Digitaria, Paspalum y Spheneria. Axonopus deludens Chase se reduce a la sinonimia de Axonopus scoparius (Flüggé) Kuhlm. Axonopus capillaris (Lam.) Chase se cita por primera vez para México. Dos especies [Axonopus chrysoblepharis (Lag.) Chase y Axonopus laxiflorus (Trin.) Chase] se excluyen de la flora mexicana. Así, Axonopus queda representado en México por ocho especies.

Translated abstract

Axonopus P. Beauv. is an American genus with ca. 71 species, mainly distributed in northern South America, with some species apparently introduced to the Old World. A synopsis of the Mexican species is provided, including synonyms, ecological and geographic distribution, comments on particular morphological features, and morphological relationships of the species. The morphological relationships with Digitaria, Paspalum, and Spheneria are discussed. Axonopus deludens Chase is reduced to synonymy of Axonopus scoparius (Flüggé) Kuhlm. Axonopus capillaris (Lam.) Chase is reported for the first time for Mexico . Axonopus chrysoblepharis (Lag.) Chase and Axonopus laxiflorus (Trin.) Chase are excluded from the Mexican flora. Thus, a total of eight Axonopus species occur in Mexico .

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Most cited references 62

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Proximate constraints on the evolution of egg size, number, and total clutch mass in lizards.

B Sinervo, Christoph P B Licht (1991)

Proximate constraints on egg size, number, and total clutch mass in side-blotched lizards were examined by experimentally reducing average clutch size from 4.6 eggs to one, two, and three eggs. Eggs from experimentally altered clutches were larger than those from controls, reflecting the trade-off between egg size and number. Moreover, the increased frequency of females with oviducally bound eggs or eggs that burst at oviposition suggests that egg size in clutches with very few eggs are at a functional upper size limit. These proximate constraints may also limit evolution of egg size in another group of lizards (Anolis) that only produces one-egged clutches.