Period when the first true mammals appeared Crossword Clue

Here is the answer for the crossword clue Period when the first true mammals appeared . We have found 40 possible answers for this clue in our database. Among them, one solution stands out with a 98% match which has a length of 8 letters. We think the likely answer to this clue is TRIASSIC.

Love the NYT Mini? Try our Mini.

Fresh puzzles every day, no paywall.

See results below advertisement

Crossword Answer For Period when the first true mammals appeared:

You can click on thetiles to reveal letter by letter before uncovering the full solution.

advertisement

40 Potential Answers:

RankAnswerLengthSourceDate
98% TRIASSIC Period when the first true mammals appeared (8)
3% DEBUT First appearance (5) The Telegraph Quick Oct 25, 2025
3% SILURIAN Period when the first true fish appeared (8) The Times Concise Jun 5, 2017
3% JURASSIC Period when birds and mammals appeared (8)
3% MIOCENE When mammals appeared (7)
2% SEEM Appear (4) Eugene Sheffer Nov 5, 2025
2% HIPPO African mammal (5) Thomas Joseph Oct 27, 2025
2% MIEN Appearance (4) LA Times Daily Oct 26, 2025
2% EMERGES Appears on the scene (7) New York Times Mini Oct 25, 2025
2% TASTE Sample first in show, appearing in gallery (5) (5) Puzzler Cryptic Oct 22, 2025
Period when the first true mammals appeared Crossword Clue
Stay up-to-date with our updates!
Explore your favorite daily puzzles and get quick tips, find missing answers to complete your crossword.
CW alt logo

Fresh Clues From Recent Puzzles

Your Crossword Clues FAQ Guide

We found 40 solutions for Period when the first true mammals appeared. The top solutions are determined by popularity, ratings and frequency of searches. The most likely answer for the clue is TRIASSIC.

With crossword-solver.io you will find 40 solutions. We use historic puzzles to find the best matches for your question. We add many new clues on a daily basis.

With our crossword solver search engine you have access to over 7 million clues. You can narrow down the possible answers by specifying the number of letters it contains. We found more than 40 answers for Period when the first true mammals appeared.