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Pachyseris gemmae

Nemenzo, 1955

Colonies have both horizontal and upright irregularly folded fronds. Valleys are parallel to frond margins except towards the base of fronds where they become irregular. Collines are wavy. Columellae are wall-like and clearly fused with septo-costae.

Colour: Brown.

Habitat: Semi-protected reefs.

Abundance: Rare.

Similar species: Pachyseris rugosa , Pachyseris speciosa

Taxonomic note: Source reference: Veron (2000). Taxonomic references: Nemenzo (1955), Veron and Hodgson (1989). Additional identification guide: Nishihira and Veron (1995).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Pachyseris gemmae.  Papua New Guinea.  P. gemmae (right) composed of both horizontal and vertical plates, adjacent to Turbinaria reniformis (left).  Charlie Veron.

Pachyseris gemmae.Papua New Guinea.P. gemmae (right) composed of both horizontal and vertical plates, adjacent to Turbinaria reniformis (left).Charlie Veron.

Pachyseris gemmae.  Philippines.  Irregularly fluted vertical plates.  Charlie Veron.

Pachyseris gemmae.Philippines.Irregularly fluted vertical plates.Charlie Veron.

Pachyseris gemmae.  Philippines.  Surface of plates.  Charlie Veron.

Pachyseris gemmae.Philippines.Surface of plates.Charlie Veron.

Pachyseris gemmae.  Philippines.  Surface detail.  Charlie Veron.

Pachyseris gemmae.Philippines.Surface detail.Charlie Veron.

Pachyseris gemmae.  Ryukyu Islands, Japan.  Showing colony surface.

Pachyseris gemmae.Ryukyu Islands, Japan.Showing colony surface.

Pachyseris gemmae.  Ryukyu Islands, Japan.  Showing colony surface.

Pachyseris gemmae.Ryukyu Islands, Japan.Showing colony surface.

Pachyseris gemmae.  Philippines.  Showing colony surface.

Pachyseris gemmae.Philippines.Showing colony surface.

Pachyseris gemmae.  Indonesia.  Showing valleys.

Pachyseris gemmae.Indonesia.Showing valleys.