Rogelio González Armas

Ampliaciones de ámbito Vol.41 (3B)

Inflorescences of Baclris gasipaes (a moooecioos neolropica1 pahn) present a strong prezigotic resource allocation toward masculinity on the inflorescence. Male reproductive effort (ERM. biomass) was 0.82 ± 0.11 g male flowers / g inflorescence. A high conelatioo between me total inflorescence biomass with female reproductive effort (ERF) (r= 0.76), indicates that plants wim bigger inflorescences allocate more resources to ihe female functioos. The pistillate flowers are situated preferentially in me inner pans of rachillas. Early ideas about evolution of protoginy, resource allocation and plant sexual systems are supported by these data.

A new regional record for the pandarid copepod, Dinemoura producta (Müller, 1785), parasitic on the shortfin mako shark captured off Cabo San Lucas, Mexico

Dinemoura producta (Muller, 1785) is a member of the Pandaridae, which comprises about 50 species of siphonostomatoid copepods exclusively parasitic on the body surface of elasmobranchs. The species is the type species of the genus and was first reported as Caligus productus Muller, 1785 from a shark from Norway. Latreille (1829) was correct to remove C. productus from that conglomeration and created for it a new genus called Dinemoura. The genus is now represented by four valid species, all of them occurring on the body surface of large pelagic sharks. In Cressey’s (1967) revision of the Pandaridae, 11 synonyms were listed under the species of D. producta suggesting a long and confusing history on the recognition and name changes of this species.