Where does “eumelanistic” come from?

eumelanistic (English) comes from English melanistic, from English -istic, from English sensationalistic, from English sensational, from English sensation, from Latin sensatio, from Latin sensatus, from Latin sēnsus — to announce, to proclaim; to put in order.

Ancestry of “eumelanistic”, step by step

eumelanistic traces back through two separate lines of ancestry.

via English melanistic

StepLanguageWordMeaning
1EnglishmelanisticOf, pertaining to, or exhibiting melanism
2English-isticUsed to form adjectives from nouns or from other...
3Englishsensationalisticsensationalist
4EnglishsensationalOf or pertaining to sensation; Piquing or...
5EnglishsensationA physical feeling or perception from something...
6Latinsensatiounderstanding, knowledge, intelligence
7Latinsensatussensible, intelligent, gifted with sense
8Latinsēnsusfaculty or power of perceiving; perception, feeling, sensation, sense
9Dutchcensusa census
10Latincensuscensus, a registering of the populace and their...
11LatincenseoI give an opinion; I think, suppose or judge; I...
12Proto-Italickensēōto give an opinion
13Proto-Italickensējō
14Proto-Indo-Europeanḱens-éh₁-ye-ti
15Proto-Indo-Europeanḱens-to announce, to proclaim; to put in order

via English eu

StepLanguageWordMeaning
1Englisheu
2Ancient Greekεὖwell
3Ancient Greekἐΰςgood, brave, noble
4Proto-Hellenicehu-good
5Proto-Indo-Europeanh₁su-good
6Proto-Indo-Europeanh₁wes-good; to be cheerful, happy; to eat, to feast
Every word from Proto-Indo-European ḱens-Every word from Proto-Indo-European ḱens-éh₁-ye-tiEvery word from Proto-Italic kensējō