Microchloropsis- the new Nannochloropsis: a lesson in the field of algal taxonomy and phylogenetics or

Why is the genus and/or species name of a strain that I ordered before now different?

From time to time, you may see different scientific names (or species identifications) for strains that you may routinely order. This can be because the strain :

a. the strain had been mis-identified

or

b. due to more efficient DNA sequencing and better computers to analyze the data, and due to a better understanding of algal phylogenetics, new algal species are being described, and old groupings are being reanalyzed. The result can be that a strain which has long been in culture has a new scientific name because, taxonomically speaking, it fits into the grouping of a newly descriped genus or species.

Regardless, though scientific names may change, the strains themselves and the original CCMP strain number do not.

Some examples are:

Nannochloropsis salina and Nannochloropsis gaditana have been assigned to the new genus, Microchloropsis (Fawley, Marvin W., Ian Jameson, and Karen P. Fawley. "The phylogeny of the genus Nannochloropsis (Monodopsidaceae, Eustigmatophyceae), with descriptions of N. australis sp. nov. and Microchloropsis gen. nov." Phycologia 54.5 (2015): 545-552.) as Microchloropsis salina and M. gaditana.

CCMP1332 and CCMP2092 formerly, Skeletonema costatum, have been assigned to the Skeletonema species marinoi (CCMP1332 in publication in Protist 159.2 (2008): 177-193) and CCMP2092 identified by Sarno, private communication, 2011).

CCMP1324 and CCMP463, Isochrysis sp. have been assigned to a new genus, Tisochrysis, and have had their species epithet defined as, lutea (Bendif, El Mahdi, et al. "On the description of Tisochrysis lutea gen. nov. sp. nov. and Isochrysis nuda sp. nov. in the Isochrysidales, and the transfer of Dicrateria to the Prymnesiales (Haptophyta)." Journal of applied phycology 25.6 (2013): 1763-1776.).

Bolidomonas pacifica has been assigned to the genus Triparma as Triparma pacifica (Ichinomiya, Mutsuo, et al. "Diversity and oceanic distribution of the Parmales (Bolidophyceae), a picoplanktonic group closely related to diatoms." The ISME journal (2016).)

Lotharella amoeboformis (our strain CCMP2058) has been assigned to the genus Amorphochlora as Amorphochlora amoeboformis (Ishida, Ken-ichiro, Akinori Yabuki, and Shuhei Ota. "Research note: Amorphochlora amoebiformis gen. et comb. nov.(Chlorarachniophyceae)." Phycological Research 59.1 (2011): 52-53 ).