Parsing of infraspecific rank signifier works for "var." but not "ssp."

[joelnitta]

Is there a list of accepted abbreviated infraspecific rank signifiers? Apparently my data include some that don't work.

8420R|Lycopodium clavatum var. aristatum (Humb. & Bonpl. ex Willd.) Spring correctly parses to
8420R||Lycopodium||clavatum|var.|aristatum|(Humb. & Bonpl. ex Willd.) Spring,

but

8418R|Lycopodium clavatum ssp. clavatum L. incorrectly parses to
8418R||Lycopodium||clavatum||ssp|. clavatum L.

Other abbreviated infraspecific rank signifiers that are not "var." or "subsp." also fail (e.g., "subf.").

[camwebb]

• ssp. now converted to subsp.
• subf. added to Regexp
• List of infraspecific rank signifiers: subsp., var., f., forma, fo., subf., taxon., prol., nothovar., lus.