placentula

placentula

An older term for a small placenta, a distinction of uncertain utility; microplacenta.
References in periodicals archive ?
Agardh and the epiphytic/epilithic diatoms Cocconeis placentula Ehrenberg and Gomponema parvulum (Kutzing) Kutzing were washed into the water column.
Positive scores show higher contributions of transparency, a variable with higher values in the months of lower rainfall, with higher abundance of the species Achnanthidium lineare, Cocconeis placentula var.
placentula Ehrenberg 1 -- -- Cocconeis sp -- 1 -- Coscinodiscus sp 10 2 8 Cyclotella sp -- -- 5 Cymbella amphicephalaNaegeli -- 1 -- C.
Among the 12 species indicators of the rural region, the most cited in the literature are Cyclotella meneghiniana Kutzing and Cocconeis placentula var.
ovalis, Anomoeoneis sphaerophora, Aphanothece stagnina, Brebissonia boeckii, Caloneis amphisbaena, Calothrix scopulorum, Cocconeis placentula, Coleofasciculus chthonoplastes, Diatoma vulgaris, Ellerbeckia arenaria, Gomphonema parvulum, Lyngbya aestuarii, Melosira varians, Meridion circulare, Microcoleus autumnalis, Navicula salinarum, N.
Diatom species Halamphora coffeaeformis, Campylostylus normannianus, Nitzschia frustulum, Navicula palestinae, Tabularia fasciculata, Navicula salinarum, Amphora securicula and Cocconeis placentula are located in the lower quadrant of the biplot (Fig.
Cocconeis placentula fue recolectada en sitios con una conductividad que oscilo entre 89 y 177 ^Scrri-1 y un pH entre 5,7 y 7,1, lo que indicaria que este taxon se desarrolla bajo condiciones eurioicas.
1, Cocconeis placentula, Navicula capitatoradiata, N.
Cocconeis placentula and Achnanthidium minutissimum, indicator species of oligotrophic Andean streams
Smith) Hendey Gyrosigma obtusatum (Sullivan & Wormley) Boyer Cocconeis placentula Ehrenberg Hantzschia abruptirostrata Lange-Bertalot & Metzeltin nov.