For what I can tell most Specs have an equivalent ParameterType, some however share a parameter type with other spec types:
Length = 4
Length,Common,autodesk.spec.aec:length-2.0.0
Sheet Length,Common,autodesk.spec.aec:sheetLength-2.0.0
Angle = 7
Angle,Common,autodesk.spec.aec:angle-2.0.0
Site Angle,Common,autodesk.spec.aec:siteAngle-2.0.0
Custom = 99
Angular Speed,HVAC,autodesk.spec.aec.hvac:angularSpeed-2.0.0
Cost per Area,Common,autodesk.spec.aec:costPerArea-2.0.0
Cost Rate Energy,Electrical,autodesk.spec.aec.electrical:costRateEnergy-2.0.0
Cost Rate Power,Electrical,autodesk.spec.aec.electrical:costRatePower-2.0.0
Diffusivity,HVAC,autodesk.spec.aec.hvac:diffusivity-2.0.0
Distance,Common,autodesk.spec.aec:distance-2.0.0
Flow per Power,HVAC,autodesk.spec.aec.hvac:flowPerPower-2.0.0
Heat Capacity per Area,Energy,autodesk.spec.aec.energy:heatCapacityPerArea-2.0.0
Isothermal Moisture Capacity,Energy,autodesk.spec.aec.energy:isothermalMoistureCapacity-2.0.0
Mass per Time,HVAC,autodesk.spec.aec.hvac:massPerTime-2.0.0
Mass per Time,Piping,autodesk.spec.aec.piping:massPerTime-2.0.0
Power per Flow,HVAC,autodesk.spec.aec.hvac:powerPerFlow-2.0.0
Power per Length,Electrical,autodesk.spec.aec.electrical:powerPerLength-2.0.0
Rotation Angle,Common,autodesk.spec.aec:rotationAngle-2.0.0
Stationing Interval,Infrastructure,autodesk.spec.aec.infrastructure:stationingInterval-2.0.0
Thermal Gradient Coefficient for Moisture Capacity,Energy,autodesk.spec.aec.energy:thermalGradientCoefficientForMoistureCapacity-2.0.0
So I don't know where that list on the left comes from it may be representing not all of the Disciplines available.
Attached lists the grouping according to SpecUtils.GetParameterType