What's eating my calathea louisae 'thai beauty'?

Calathea Louisae 'Thai Beauty' is vulnerable to spider mites and mealybugs, the most prevalent indoor calathea pests. Its elongated patterned leaves can harbour mealybugs along the mid-rib. Thrips occasionally attack new unfurling growth. Maintaining humidity above 50% and inspecting weekly significantly reduces the risk of damaging infestations.

Bronze or silver stippling across leaf surfaces; fine webbing on undersides; leaves look dull and tattered Raise humidity, wipe both leaf surfaces with a damp cloth, spray neem oil or insecticidal soap every 5–7 days for 3 weeks

Fluffy white wax along the mid-rib and in leaf axils; leaves yellow and plant loses vigour Dab colonies with 70% isopropyl alcohol, follow with neem oil spray, isolate the plant and check weekly

Silvery scars and tiny dark frass on new leaves; distorted unfurling growth Remove badly affected leaves; spray spinosad or insecticidal soap every 5 days for at least 3 applications