synchronic

1. Synchronous.
2. Of or relating to the study of phenomena, such as linguistic features, or of events of a particular time, without reference to their historical context.

adjective

Belonging to the same period of time as another: coetaneous, coeval, coexistent, concurrent, contemporaneous, contemporary, synchronous. See time.

synchronic [sin‐kron‐ik], concerned only with the state of something at a given time, rather than with its historical development. In modern linguistics, the synchronic study of language as it is has generally been preferred to the diachronic study of changes in language that dominated the concerns of 19th‐century philology.

Noun: synchrony.

The adjective has 3 meanings:

Meaning #1: occurring or existing at the same time or having the same period or phase
  Synonyms: synchronous, synchronal

Meaning #2: concerned with phenomena (especially language) at a particular period without considering historical antecedents
  Synonym: descriptive
  Antonym: diachronic (meaning #1)

Meaning #3: (of taxa) occurring in the same period of geological time