Below, is a list of some sections I have encountered with some examples of species. That is VERY FAR from exhaustive

One website to check which section the Dendrobium belongs to is
http://www.orchidspecies.com/

The book is
Orchids species culture - Dendrobiums by Baker and Baker - Timber press

The website to buy culture sheets by the piece for $1 is:
https://www.orchidculture.com/

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Some sections I have encountered:
Section Callista: needs extended dry rest in winter to bloom properly. Medium bright light. Will take low temperatures at night.
lindlyei (syn. aggregatum), thyrsiflorum, jenkensii, chrysotoxum etc...

Section Spatulata (Antelope): no rest, plenty of water year-round, cold intolerant, high light
Spatulata from New-Guinea: antennatum, gouldii, stratiotes, stebloceras, tangerinum, lasianthera, lineale, mirbelianum, sylvanum, violaceoflavens etc...
Spatulata from Australia: canaliculatum, carronnii, undulatum (also called discolor) affine, bigibbum, phalaenopsis etc...
Hybrids usually sold in this section in the US.

Section Latouria: easy care, no rest, moderate watering, high light, can take low temperatures
atroviolaceum, normanbyense etc... Mostly hybrids sold in the US.

Section Dendrobium: extensive dry rest
anosmum, friedericksianum, unicum and many more

Section Breviflores: strong reduction of watering in winter, medium light
hercoglossum, linguella etc...

Section Calcarifera:
amethystoglossum, Victoria-Regina etc...

Section Pedilonum:
bullenianum, goldschmidtianum etc....

Section Dendrocoryne (Australian hard canes): extensive dry rest and low temperatures in winter needed for proper flowering
speciosum, fleckeri, tetragonum etc...

Section Rhopalante: many small flowers, short-lived. water year-round
faciferum, crumenatum etc....

Section Calyptorichilus:
aemulum, lawesii etc..

Section Formosae:
lowii etc...

Section Dockrilla:
linguiforme etc...



Past videos of mine on some Dendrobiums:

Den. anosmum: (Section Dendrobium)

   • How I care for my Dendrobium anosmum ...  

Den. lindleyi: (Section Callista)

   • How I care for my Dendrobium lindleyi...  

Antelope Dendrobiums: (Section Spatulata)

   • How I care for my Dendrobium Lowana N...  
   • How I care for my Dendrobium tangerin...  

Den. hercoglossum (Seciton Breviflores)

   • How I care for my Dendrobium hercoglo...