Nah, it's a minor mistake in the DMB. ATM it reads
Code:
type				african_missile_african_iberian_rhodian_slingers
skeleton			fs_slinger, fs_slinger
indiv_range			40
---
texture				numidia, eb/data/models_unit/textures/hellenistic/ebhellenistic_infantry_rhodian_slingers_aymar_regional.TGA
texture				romans_julii, eb/data/models_unit/textures/roman/ebhellenistic_infantry_rhodian_slingers_aymar_regional.TGA
texture				carthage, eb/data/models_unit/textures/hellenistic/ebhellenistic_infantry_rhodian_slingers_aymar_regional.TGA
---
when what it should read is
Code:
type				african_missile_african_iberian_rhodian_slingers
skeleton			fs_slinger, fs_slinger
indiv_range			40
---
texture				numidia, eb/data/models_unit/textures/hellenistic/ebhellenistic_infantry_rhodian_slingers_aymar_regional.TGA
texture				romans_julii, eb/data/models_unit/textures/hellenistic/ebhellenistic_infantry_rhodian_slingers_aymar_regional.TGA
texture				carthage, eb/data/models_unit/textures/hellenistic/ebhellenistic_infantry_rhodian_slingers_aymar_regional.TGA
---
...although the fact the unit doesn't have a sprite in yet may also be involved (should just make them disappear or go grey-peasant or somesuch when you zoom far away enough though...).