Do animals that sleep during the day have a different sleep architecture than those who sleep at night? A typical hypnogram, delineating the sleep architecture for a (human) mammal looks like



A distinct distribution of non-REM and REM sleep can be observed.  

Is this pattern of sleep cycles particular to that of diurnal mammals, and if so, how would the sleep architecture of a mammal that sleeps during the daytime be different?
One study (Zhao et. al., 2010), investigating the sleep architecture of two bat species (one nocturnal, and one mixed), notes the following:


  C. sphinx was found to sleep predominantly throughout the day (60% of total sleep quota) during which time it spent significantly longer
  time in NREM and REM sleep. Compared to E. spelaea, C. sphinx had
  significantly less REM and NREM sleep episodes but their duration was
  significantly longer. E. spelaea appears to distribute its time at
  wake and in REM and NREM sleep equally throughout the light and dark
  phases.



Top three rows are for the predominantly nocturnal bat C. sphinx. Note the "Wake" rows for the two species.

Source:

Zhao, X., Sun, H., Tang, Z., Flanders, J., Zhang, S., &amp; Ma, Y. (2010). Characterization of the sleep architecture in two species of fruit bat. Behavioural brain research, 208(2), 497-501.