All of the following are features of prematurity in a neonate, except –
The ears in a premature neonate are soft and flat with ear cartilage being deficient and plant (and not thick)
Features of prematurity in a Neonate :

Baby is small in size usually less than 47 cm long.
Head is relatively large, sutures are widely separated and fontanelle are large
The face is small and buccal pad of fat is minimal
Skin is thin and pinkish and appears shiny due to generalized edema.
Skin is covered with abundant lanugo and there is little vernix caseosa.
Subcutaneous fat is reduced
The breast nodule is less than 5 mm wide
The ears are soft and flat with ear cartilage being deficient and plant
Testes are not descended into the scrotal sac. (Empty scrotum)
Scrotal sac is poorly pigmented and has fewer rugosities.
In females labia majora appears widely separated, exposing the labia minora and the clitoris.
Deep creases are not well developed in the sole. (There may be a single deep crease over the anterior one-third of the sole) 
Neonatal reflexes such as Moro, Suckling & Swallowing are sluggish.
There is hypotonia with a poor recoil of the flexed forearm when extended.
No creases on sole
Abundant lanugo
Thick ear cartilage
Empty scrotum