( ( In ( this classification ) ) ( , ( Caerorhachis ( ( is ( ( ( ( ( a ( close ancestor ) ) ( of amniotes ) ) , ) or ) ( tetrapods ( that ( ( lay eggs ) ( on land ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT this) (NN classification))) (, ,) (NP (NNP Caerorhachis)) (VP (VBZ is) (NP (NP (NP (DT a) (JJ close) (NN ancestor)) (PP (IN of) (NP (NNS amniotes)))) (, ,) (CC or) (NP (NP (NNS tetrapods)) (SBAR (WHNP (WDT that)) (S (VP (VBD lay) (NP (NNS eggs)) (PP (IN on) (NP (NN land))))))))) (. .)))
In this classification, Caerorhachis is a close ancestor of amniotes, or tetrapods that lay eggs on land.
(ROOT (S (NP (NNS Caecillians)) (VP (VBD evolved) (PP (IN from) (NP (JJ tetrapod) (NNS ancestors)))) (. .)))