An user Spanish
says…

Todas
Determiner
  las
Determiner
  especies
Noun
  actualmente
Adverb
  conocidas
Adjective
  tenían
Verb
  unos
Determiner
  tres
3
Numeral
  metros
Noun
  o
Coordinating conjunction
  menos
Adverb
  de
Adposition
  largo
Noun
.

All currently known species were about three meters or less in length.
Words and sentences
New
las

New
especies

New
actualmente

at present, currently, now, nowadays

New
conocidas

New
metros

plural of metro

New
menos

New
de

New
largo

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