I'm not familiar with the system and seeing the low reaction to it, I decided to take a look but I found your general monster lore skill: its zoology on page 99. For intelligent humanoids of a lesser tech level, use anthropology and for societies of equal, or better, tech level: use sociology (although it isn't listed).
I also found the reason for developing specializations: because the GM is advised to limit the number of DP to be put in general skills, to 75%, each level. Otherwise: simultaneous development of the skill and its specialization, from a reality viewpoint, gives a double bonus.