What meditation practice(s) are encompassed by 'asubha' (non-beautiful)?

I've heard one teacher say that in the EBT (early buddhist texts), asubha practice only refers to 31 body parts, and later Theravada expanded it to include 9 cemetary corpse decay, and perhaps other practices as well?

Does anyone know for sure? In the pali suttas, most of the references to asubha do not specify a specific meditation practice(s). 

Is AN 10.60 the only place where asubha is specifically assigned to 31 body parts?

I'd prefer to believe asubha meditation encompasses more practices than just the 31asb, unless there is conclusive evidence. Simply because in an oral tradition where memory of teachings is mandatory, it's helpful when a label, 'asubha' in this case, covers all the practices that could qualify for doing that job.

We know that the purpose of asubha (ugly or non-beautful), is to counter the effects of subha (beautiful) have in inducing lust/passion/desire for sensual pleasure, especially for sex.

Clearly the stages of decomposition of corpses, the discharge from the 9 orifices of the body, all qualify in accomplishing that goal.

AN 10.60 defines the practice of asubha as 31 body parts contemplation

Katamā cānanda, asubhasaññā?	And what is the perception of ugliness?
Idhānanda, bhikkhu imameva kāyaṃ uddhaṃ pādatalā adho kesamatthakā tacapariyantaṃ pūraṃ nānāppakārassa asucino paccavekkhati:	It’s when a monk examines their own body up from the soles of the feet and down from the tips of the hairs, wrapped in skin and full of many kinds of filth.
‘atthi imasmiṃ kāye kesā lomā nakhā dantā taco, maṃsaṃ nhāru aṭṭhi aṭṭhimiñjaṃ vakkaṃ, hadayaṃ yakanaṃ kilomakaṃ pihakaṃ papphāsaṃ, antaṃ antaguṇaṃ udariyaṃ karīsaṃ, pittaṃ semhaṃ pubbo lohitaṃ sedo medo, assu vasā kheḷo siṅghāṇikā lasikā muttan’ti.	‘In this body there is head hair, body hair, nails, teeth, skin, flesh, sinews, bones, bone marrow, kidneys, heart, liver, diaphragm, spleen, lungs, intestines, mesentery, undigested food, feces, bile, phlegm, pus, blood, sweat, fat, tears, grease, saliva, snot, synovial fluid, urine.’
Iti imasmiṃ kāye asubhānupassī viharati.	And so they meditate observing ugliness in this body.
Ayaṃ vuccatānanda, asubhasaññā. (3)	This is called the perception of ugliness.