Kalmar "Genus Tetragnathus" babu ita. Duk da haka, akwai irin wannan kalmar "Genus Tetragonurus" wanda ke nufin jinsin kifi a cikin iyali Aulopidae, wanda aka fi sani da "fishes sabretoothed" ko "flagfins". Ana samun waɗannan kifayen da farko a cikin zurfin ruwa mai zurfi kuma ana siffanta su da tsayin siffar jikinsu, manyan hakora masu kama da haƙora, da haskoki na fin da suka wuce wutsiyoyinsu.