Frustulia membranacea Griffith & Henfrey, 1856 (original description)
Gyrosigma aestuarii (Brébisson ex Kützing) Griffith & Henfrey, 1856 accepted as
Navicula aestuarii Brébisson ex Kützing, 1849 (new combination reference)
Gyrosigma angulatum var. angulatum Griffith & Henfrey, 1856 (original description)
Gyrosigma angulatum var. beta Griffith & Henfrey, 1860 (original description)
Gyrosigma angulatum var. gamma Griffith & Henfrey, 1860 (original description)
Gyrosigma balticum var. beta Griffith & Henfrey, 1856 (original description)
Gyrosigma decorum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma decorum var. decorum W. Smith, 1853 (new combination reference)
Gyrosigma delicatulum (W.Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma delicatulum var. delicatulum W. Smith, 1852 (new combination reference)
Gyrosigma distortum var. distortum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma distortum var. distortum W. Smith, 1852 (new combination reference)
Gyrosigma elongatum (W.Smith) G.S.West, 1909 accepted as
Pleurosigma elongatum var. elongatum W. Smith, 1852 (new combination reference)
Gyrosigma fasciola var. fasciola (Ehrenberg) Griffith & Henfrey, 1856 accepted as
Ceratoneis fasciola Ehrenberg, 1839 (new combination reference)
Gyrosigma formosum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma formosum var. formosum W. Smith, 1852 (new combination reference)
Gyrosigma intermedium (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma intermedium var. intermedium W. Smith, 1853 (new combination reference)
Gyrosigma intermedium var. nubecula (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma nubecula var. nubecula W. Smith, 1853 (new combination reference)
Gyrosigma lacustre (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma lacustre W.Smith, 1852 (new combination reference)
Gyrosigma littorale (W.Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma littorale var. littorale W. Smith, 1852 (new combination reference)
Gyrosigma macrum var. macrum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma macrum W.Smith, 1853 (new combination reference)
Gyrosigma nubecula Griffith & Henfrey, 1860 (original description)
Gyrosigma obscurum (W.Smith) J.W.Griffith & Henfrey, 1856 (new combination reference)
Gyrosigma prolongatum var. prolongatum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma prolongatum var. prolongatum W. Smith, 1852 (new combination reference)
Gyrosigma quadratum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma quadratum var. quadratum W. Smith, 1853 (new combination reference)
Gyrosigma rigidum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma rigidum var. rigidum W. Smith, 1853 (new combination reference)
Gyrosigma speciosum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma speciosum var. speciosum W. Smith, 1852 (new combination reference)
Gyrosigma spenceri f. spenceri (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma spencerii f. spencerii W. Smith, 1852 (new combination reference)
Gyrosigma strigilis var. strigilis (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma strigilis f. strigilis W. Smith, 1852 (new combination reference)
Gyrosigma strigosum (W.Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma strigosum var. strigosum W. Smith, 1852 (new combination reference)
Gyrosigma tenuissimum var. tenuissimum (W. Smith) Griffith & Henfrey, 1856 accepted as
Pleurosigma tenuissimum var. tenuissimum W. Smith, 1853 (new combination reference)
Gyrosigma transversale (W. Smith) Griffith & Henfrey, 1860 accepted as
Pleurosigma transversale var. transversale W. Smith, 1856 (new combination reference)
Himantidium pectinale var. beta Griffith & Henfrey, 1856 (original description)