A8V

There is no A8V dagger type. HD 158352 is the best candidate A8V
standard I can find.

Morgan65 classified two Hyads as A8Vn: HD 28024 & HD 28910. 

Cowley69 did not list an A8V standard, but classified 26 stars as A8V 
or variant (brightest three are HR 1392, HR 1394, HR 1444)

Cowley76 did not list an A8V standard, but classified two bright stars as A8V:
HR 1388 (A8Vn) and HR 8270 (A8Vn)

Gray01/03/06 lists 5 A8V stars, with median HIP colors of: 
<B-V>(A8V) = 0.230 (+-0.016 sem, +-0.038 stdev; N=5)
<V-I>(A8V) = 0.261 (+-0.015 sem, +-0.038 stdev; N=5)
The brightest are HIP 105199 (V=2.5), HIP 32607 (V=3.3), and HIP 75695 (V=3.7).

# No standard
MK43, JM53, Morgan65, Cowley69, MK73, Cowley74, Cowley76, Houk, Keenan85 do not
provide an A8V standard

Skiff08 did not flag any stars as A8V MK standards. 

I searched Skiff08 MK catalog to find stars with 3 or more "A8V" classifications:
HD 28024 = HR 1392 (3 refs; V=4.3; Hyad; no Teffs)
HD 158352 = HR 6507 (3 refs; V=5.4; Teff from Masana06)

GrayGarrison89 classified A3-A7, but listed some A8 stars. The only two
non-standard dwarfs were HD 96113 (A8V+) and HD 205924 (A8Vn). 

# Proposed Candidate Standard
HD 158352 = HR 6507 = HIP 85537
  A8V: Jaschek78(Cowley69),Kennedy83(Cowley69),Abt95,Mora01(A8Vp)
  A5: Cannon
  Houk adopts A8V by cites "SIMBAD type listed; vsini=190 [km/s]."
  Skiff08 lists only three classifications -- all are A8V or variant. 
  Vmag=5.44. Shell & Vega-type star. 

HD 28024 = ups Tau
  A8Vn: Abt95,Cowley69,Morgan65
  A9IV-n: GrayGarrison89
  A7.5V: Palmer68
  F0III-IV: Slettebak55
  B-V(HIP)=0.263 (exactly halfway between A7 & F0)
  Good agreement on type from Morgan, Cowley, & Morgan, but GrayGarrison call A9

# Others
HD 203280 = alf Cep = HIP 105199 (from A7V README file)
  A7V: MK43,Palmer68
  A7V-IV: Cowley69,Jaschek78
  A7:Vn: Abt95
  A8IV: Barry70
  A8Vn: Gray03
  A5: Cannon
  Jaschek64 lists mix of (A7V, V-IV, & IV-V)
  B-V(HIP)=0.257, dMv=-0.73, d=15pc
  Subtypes shifted a bit A7=>A8 and it appears to be slightly evolved
  Probably best considered a "A8IV-V", and probably not the best standard