▁Ad ult s ▁have ▁been ▁recorded ▁on ▁wing ▁in ▁August . ▁ ▁References ▁ ▁Category : M oth s ▁described ▁in ▁ 1 9 2 1 ▁Category : Sc op ari inae <0x0A> </s> ▁Ob es ot oma ▁la ev ig ata ▁is ▁a ▁species ▁of ▁sea ▁sn ail , ▁a ▁marine ▁g ast rop od ▁m oll usk ▁in ▁the ▁family ▁Mang eli idae . ▁ ▁Description ▁The ▁length ▁of ▁the ▁shell ▁var ies ▁between ▁ 6   mm ▁and ▁ 2 0   mm . ▁ ▁( Original ▁description ) ▁The ▁short , ▁st out ▁shell ▁consists ▁of ▁four ▁or ▁five ▁robust ▁wh or ls . ▁These ▁are ▁smooth , ▁or ▁with ▁excess ively ▁fine ▁revol ving ▁lines . ▁The ▁sp ire ▁is ▁short , ▁usually ▁one ▁third ▁or ▁less ▁of ▁the ▁total ▁length , ▁but ▁varying ▁somewhat . ▁The ▁s uture ▁is ▁distinct ▁but ▁not ▁channel led . ▁The ▁wh or ls ▁are ▁not ▁tur ret ed . ▁The ▁a pe x ▁is ▁rather ▁obt use . ▁The ▁proto con ch ▁is ▁minute , ▁wh it ish , ▁smooth ▁and ▁consists ▁of ▁ 1 ½ ▁wh or l ▁. ▁The ▁wide ▁a pert ure ▁is ▁about ▁two - third s ▁as ▁long ▁as ▁the ▁shell . ▁The ▁outer ▁lip ▁is ▁eff use . ▁The ▁s ut ural ▁sin us ▁is ▁more ▁or ▁less ▁marked . ▁The ▁wide ▁si ph onal ▁canal ▁is ▁short ▁and ▁straight . ▁The ▁exterior ▁is ▁sometimes ▁marked ▁with ▁rather ▁rug ged ▁lines ▁of ▁growth , ▁or