spiraloconulus spiraloconulus spiraloconulus is a genus of middle jurassic forams with a coarsely agglutinated, microgranular, calcareous wall. the test is large, conical to cylindrical, coiled somewhat straight; the early coiled stage results in a flattened apex. distinctly coiled microspheric tests are as much as 2 mm wide and 1.6 mm high. megalospheric tests are smaller, up to 1.5 mm high and 1.1 mm wide. spiraloconulustemporal range: middle jurassic scientific classification (unranked): sar (unranked): rhizaria phylum: foraminifera subclass: textulariia order: loftusiida family: spirocyclinidae genus: spiraloconulusallemann and schroeder, 1980 spiraloconulus is known from the middle jurassic of france, italy, sardinia, and arabia. timidonella is another spirocyclind from the same time, but with a wider distribution.