Metoro definitely identified this glyph type with moko, 'lizard'.

1. An important characteristic of moko glyphs is the rounded abdomen. This made me recognize a sign of moko in the following glyphs:

Gb3-13	Gb3-16	Gb3-18

There are no clear moko glyphs in the text of G. Although the curious 'person' in Gb3-16 cannot be said to have an obviously swollen stomach I anyhow thought it useful to consider the glyph as a possible moko candidate - its position between the pair of corpulent hanau is suggestive. Thin moko glyphs are very rare, if they exist at all.

Hanau glyphs, on the other hand, do not show any signs of being fat, and the rounded bellies in Gb3-13 and Gb3-18 should therefore be considered signs of moko. The body posture with limbs spread out is a common trait in moko and hanau glyphs:

Ga1-12	Ga1-14	Ga6-17	Ga8-18	Ga8-24	Gb1-2
Gb2-14	Gb2-31	Gb3-13	Gb3-18	Gb7-28	Gb8-26

Possibly the word moko(h)i ('full-grown berry') is alluded to by moko glyphs - illustrated by the full-grown belly.