Parietobasilar muscles: A muscle which extends diagonally from the column wall to the pedal disc (and basilar muscle) forming a triangular area on each mesentery (Carlgren, 1949: p. 8). This muscle occurs in conjunction with basilar muscles.

Images of Parietobasilar muscles: (species names are linked to the Hexacorallian database)

 

Species: Acontiactis gokhaleae

CAPTION
Figure 4. *Acontiactis* gen. nov. *gokhaleae* sp. nov. Transverse section through region below actinopharynx, passing through a pair of directive mesenteries, another pair of 1st cycle mesenteries and two and a half pairs of 2nd cycle mesenteries. Scale = 90 µm. (c: column wall, f: filament, p: parietobasilar muscle, r: retractor muscles, 1: 1st cycle, 2: 2nd cycle, D: directive mesenteries; black: mesogloea, stippled: ectoderm, white: endoderm). Reprinted with permission of Balkema Publishers. See www.baldema.nl.

Species: Aulactinia incubans

CAPTION
Fig. 5. Column cross section showing parietobasilar and diffuse retractor muscles (paratype: NMCIC No. 1980-141c). Permission to display image courtesy of Canadian Journal of Zoology.

Species: Stomphia pacifica

CAPTION
2: Diagram of muscles on an imperfect mesentery in *Stomphia pacifica*. R (retractor muscle), PB (parietobasilar muscle), B (basilar muscle), MF (mesenterial filaments), T (tentacle), S (sphincter), P (mesogloea) Reprinted with the permission of the Asociación Argentina de Ciencias Naturales.

Species: Stomphia pacifica

CAPTION 5: Diagram of one pair of perfect mesenteries with muscles. PH (pharynx), R (retractor muscle), PB (parietobasilar muscle), PA (parietal muscle), C (column). Reprinted with the permission of the Asociación Argentina de Ciencias Naturales.