Palaecysta pectita subsp. merinai Chen, 2013, p.294, pl.11, figs.132–134, text-fig.10, no.30.

Holotype: Chen, 2013, pl.11, fig.132: text-fig.10, no.30.
Age: late Tithonian.

Original description (Chen, 2013):
Palaecysta pectita subsp. merinai subsp. nov.
merina, in honor of the name of the people in the highlands in the western part of Madagascar where the Ankamotra-1 well was drilled.
Holotype. Plate 11, Figure 132, Slide 1244-47, E33.
Paratypes. Plate 11, Figure 133, Slide 1286-95, P51; Plate 11, Figure 134, Slide 1286-95, Q46.

Diagnosis: This subspecies is characterized by the fragile nature of the spinous processes arising from membranous basal ridge (Figure 9, drawing 4; Figure 10, drawing 30).

Dimensions (based on measurements from 20 specimens):
Holotype – Whole specimen 85 µm; central body 62 µm; process length 20 µm
Range – Whole specimen 80 (85) 190 µm; central body 58 (60) 63 µm; process length 17 (18) 20 µm

Remarks: P. pectita subsp. merinai is most similar to, but differs from, P. pectita in the fragile nature of its spinous processes; it further differs from P. crispabaculata and P. crispabaculata subsp. delicata in having a higher basal ridge.
Occurrences in the Ankamotra-1 well. P. pectita subsp. merinai occurred abundantly towards the base of Zone 5 (Late Tithonian).