F0IV

JM53 lists mu Cet and eps Cep as F0IV standards, and zet02 Lyr as a
non-standard F0IV.

MK73 lists 57 Tau (HR 1351) as the F0IV standard. 

MorganAbt72 lists del Aql (HR 7377) as F0IV standard.

Garcia89 lists 3 F0IV standards: HD 17094 (mu Cet), HD 27397 (57 Tau),
and HD 211336 (eps Cep)

Cowley74 lists Mu Cet, Eps Cep, and 57 Tau as their F0IV standards. 

GrayGarrison89 list the F0IV standards as HD 27397 (57 Tau) [low vsini standard]
and HR 8895A [high vsini standard]

Houk88 adopts mu Cet (HR 813 = HD 17094) as their F0IV standard, from JM53

Gray06 classifies 3 stars as F0IV: HIP 9236, 72197, 84581

GryaNstars lists 57 Tau as their F0IV CTIO, DSO, and Steward Obs. standard.

There are no F0IV anchor points (Garrison94), indeed no subgiant
anchors earlier than G0IV.

# Primary Standard
HD 27397 = HR 1351 = 57 Tau = vB 30 = VA 182 = V483 Tau (J0419+1402)
  F0IV: MK73,Cowley74(stan),MK78,Gray89,GrayGarrison89(low-vsini stan),Gray01
  F0V: Morgan65
  Hyad, pmRA,pmDec = +116,-19 (TYC2), Vmag=5.58, vsini=109 km/s
  Mv=2.32 (Allende-Prieto99). Delta Scuti (Rodriquez94), per=0.054 d
  (Samus+07). 34" binary. B-V = 0.288+-0.0037 (Joner+06).  According
  to Pinsonneault04 tracks, B-V=0.286 (close to Joner value)
  corresponds to 1.72 Msun, Teff=7471K, and Mv=2.35. Hence the star's
  HRD position is consistent with it being on the Hyades ~0.6 Gyr
  MS. MK78 shows HD 27397 as the F0IV standard (labeled as a Hyades
  member), and compares it to the F0V standard HD 23585 (Pleiad) and
  F0III standard Zet Leo.  The Pinsonneault Hyades MS runs to 8280K
  (B-V=0.14; ~A3.5). Most HRD diagrams with luminosity tracks in B-V
  vs. Mv show the subgiant "IV" track join the upper main sequence
  around the early Fs.

# Secondary Standard
HD 211336 = HR 8494 = HIP 109857 = eps Cep
  F0IV: JM53,Jaschek64(most),Barry70,Cowley74(stan),Ortega83,Abt95
  F0V: MK43
  F0V Sr II: Gray01
  F0: Cannon
  A9IV: GrayGarrison89
  B-V = 0.278, Mv=2.09, dMv= -0.33, so only slightly above MS. 
  GrayGarrison89 called "A9IV", but Gray01 called it "F0V Sr II". 
  Virtually everyone agrees on "F0" subtype. All post-JM53 consider it "IV".
  Probably an acceptable secondary standard "F0IV" a la JM53. 

# Weak Standard
HD 17094 = HR 813 = mu Cet (J0244+1006)
  F0IV: JM53,Jaschek64(all),Cowley74(stan),Cannon(F0) 
  F1III-IV: Malorada75
  F0III-IV: Abt95 
  F0mF2V+: GrayGarrison89(note)
  F1IVb: Barry70
  A9IIIp: Gray03("some metals = F1")
  SB. Apparently composite. Gray/Garrison do not agree with JM53.
  GrayGarrison89 do not list it as a standard, and in the notes comment:
  "Probable composite spectrum. Close visual double with delta(V)=1.4 and sep=0".1."