The glare from an 80% waning gibbous Moon also hindered observations. Waxing Gibbous also means a Lunar phase from First quarter to Full moon. During the intervals between principal phases, the Moon's apparent shape is either crescent or gibbous. The whorls are rounded, rather gibbous, those of the spire obtusely angulated. The small shell is ovate, thick and slightly gibbous. The whorls are often gibbous or tuberculose beneath the sutures, smooth or spirally ribbed. The completed sculpture, titled "Waxing Gibbous," was displayed at the Bridges Math Art Conference. Middleton's fifth solo album, entitled "Waxing Gibbous", was released on 8 June 2009. The whorls are rounded, rather gibbous, concentrically ribbed, smooth. The genus is characterized by personate flowers with an inferior gibbous corolla. The name is descriptive of their rounded shapes (gibbous meaning humped). The epithet "gibba" comes from the Latin adjective "gibbus", meaning "humped" or "gibbous".