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Aquamarine Anthropoid Historia
- (Tropical estuarine-arboreal habitat) -
[not complete, need to review, no attempt to determine specific geographic locales]
My conjecture: Anthropoids are derived from island tarsier-like mammals, tarsier-like mammals derived from nocturnal inland some lemur-like mammals which had been islanded on isles (or oasis?) free of terrestrial predators. These mammals underwent change from nocturnal to diurnal, losing the tapetum lucida and gaining color vision and reduced olfaction due to much time spent in trees and on shores. Due to sea level changes and climate change, some of them stayed at the island and evolved into diurnal proto-anthropoids while the other tarsier-like mammals returned to continental situation with predators and so returned to nocturnal activities enlarging the eyes but without tapetum lucida (root of the modern tarsiers).
The island (plate?) became wetter (more regular monsoons), mangroves thickened inviting fruit bats to roost at the thick mangrove periphery thus depositing continental fruit seeds in their feces into the island's interior while seabirds deposited guano, this combined with volcanic tephra/ash into good soils soon covered with vegetation but still likely lacking large predators. Sea turtle eggs, small colonies of seabirds, some forest birds, but these proto-anthropoids mostly "owned" the fruit trees, mangroves and shores (and possibly reefs) and successfully competed against the fruit bats which could easily fly to the nearby continent for unlimited foods yet sleep unaffected by continental predators (forest cats?) on the isle..
These proto-anthropoids became more adept at branch climbing developing longer limbs and some agility at swinging but remained quadrupedal terrestrially during dry/wet seasons and during tidal foraging and egg harvesting (Chacma babbons eat shark egg cases, gibbons eat bird eggs...). They were not excellent swimmers but could swim dog-paddle in water without surf.
At this period, they speciated into different niches, foliovore vs frugivore vs etc. most retained some omnivory, semi-independently developing small invaginations in parts of the vocal/respir./nasal anatomy which eventually became variants of paranasal sinuses (later lost in baboons due to dry plains) and laryngeal air sacs (later lost in small gibbons due to non-terrestrial non-aquatic pure arboreality) and Homo (later lost due to backfloating/forage-diving) for calling and improved flotation.
This period produced the NW monkeys expansion. The proto--apes slowly became specialized in semi-vertical float-wading while still mostly above branch (as did the later macaques to a lesser extent) along tidal areas (apes with largest air sacs) and so were the first to speciate onto the continent when sea levels changed.
Wet Hylo scenario: The separation of the Hylobatids from the great apes.
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