Bibliographic Detail
Mertens, K.N., Yamaguchi, A., Kawami, H., Rineiro, S., Leander, B.S., Price, A.M., Pospelova, V., Ellegaard, M. & Matsuoka, K., 2012
Reference:
Mertens, K.N., Yamaguchi, A., Kawami, H., Rineiro, S., Leander, B.S., Price, A.M., Pospelova, V., Ellegaard, M. & Matsuoka, K. (2012). Archaeperidinium saanichi sp. nov.: A new species based on morphological variation of cyst and theca within the Archaeperidinium minutum Jörgensen 1912 species complex. Marine Micropaleontology 96-97: 48-62, 7 figs.
Abstract:
In this paper we describe a new species, Archaeperidinium saanichi sp. nov. within the Archaeperidinium
minutum Jörgensen 1912 species complex. We examined the morphological variation of the cyst and motile
stage by incubation experiments from sediment samples collected in coastal British Columbia (Canada), and
compared it to closely related species. The theca of A. saanichi is differentiated from related species by overall
size, the asymmetry of the intercalary plates and the right-sulcal plate (S.d.) not touching the cingulum. We
provide a key to differentiate all closely related species. A. saanichi can be readily distinguished from A.
minutum by a distinctively large cyst with a broad 2a type archeopyle and regularly spaced processes with
relatively broad bases and aculeate process tips. Molecular phylogenetic analyses of large and small subunit
(LSU and SSU) rDNA sequences demonstrated a close affinity of this species to A. minutum; however, the relatively
high level of sequence conservation in dinoflagellate rDNA sequences made these particular markers
inadequate for distinguishing one species from the other. Sediment-trap data suggest that A. saanichi has a
preference for cooler temperatures and lowered salinities.
