Lanceola

Abstract: Grateloupia lanceola was originally described from the southern Iberian Peninsula and northwestern Africa coasts. Its current Iberian distribution only includes some localities in NW (La Coruna) and SE (Malaga) Spain. The closely related invasive species Grateloupia turuturu is present in Galicia (NW Spain) since 1991 and in northern Portugal since 1997. Galicia is the only area in Europe where both especies are sympatric. This paper presents a comparative study of G. lanceola and G. turuturu along the Iberian Peninsula coast. The blade of G. lanceola is purplish red with a characteristic emerald green colour to the base, and usually has scattered paler spots. Moreover, it is 200-450 µm thick, has a sort stipe, and marginal proliferations developed usually only in eroded areas. The lamina of G. turuturu is red or pink through, without paler spots or green areas. It is thinner (130-250 µm), has a long stipe, and frequent congenital marginal proliferations.

Abstract: Anastrepha is the most diverse and economically important genus of Tephritidae in the American tropics and many species remain undescribed. Three new species A. acuminata, A. carreroi and A. sinuosa collected from Colombia are described in this paper and six species: A.isolata, A. perdita, A. sororcula, A. montei, A. panamensis and A. lanceola are reported from Colombia for the first time. The Colombian species of Anastrepha are discussed.

Abstract: Grateloupia is a genus of red algae in which many species are notoriously difficult to define; this situation greatly complicates the assessment of their geographical ranges. A member of this genus, G. lanceola, is typical of warm-temperate seas but retains some highly localized populations at higher latitudes on the northwestern Iberian Peninsula (Galicia). Nevertheless, the presence of these northern populations has been largely overlooked; instead, they have been regarded as, or suspected to be, another case in the expansion of the adventive congeneric Grateloupia turuturu along European waters. In this study, we have examined the genetic similarity between specimens of G. lanceola and G. turuturu from Galicia using randomly amplified polymorphic DNA (RAPD) markers. The large genetic distance between species detected provides molecular-based support for the occurrence of G. lanceola in the northwestern Iberian Peninsula as a separate species from the invasive G. turuturu, corroborating earlier...

Abstract: A new genus (Gijfenia) is described from a re-investigation of Nitzschia cocconeiformis Grun. found in material deposited in the Natural History Museum (London) by Giffen. It is an extremely robust diatom with chambering of the valve in the “pinnularioid manner”. A light and scanning electron microscope study of its morphology is provided together with comment on its classification. Gijfenia is compared with some other species in the literature. In the same material Nitzschia (Tryblionella) lanceola Grun. was found and in SEM the “spines” reported in the literature were discovered to be spathulate.