Literature and adopted spectral types. Red filled circles and blue crosses stand for cluster members and non-members, respectively. Literature spectral types were retrieved from Greenstein & Keenan (1958), Guetter (1981), Nesterov et al. (1995), Wolk (1996), Houk & Swift (1999), Zapatero Osorio et al. (2002), Sacco et al. (2008), Caballero et al. (2008, 2012), Manara et al. (2013), and Hernández et al. (2014). The G7 star previously classified as A0 is “IDS 05335–0238 D”; the early spectral type may actually correspond to a close-by early A star at a few arcseconds (Hernández et al. 2014). The F7 star previously classified as K0 is Mayrit 968292; the late-G/early-K estimation from photometry by Caballero (2008a) was incorrect.