Isolepis 1a Western Flora, Western Australia 110925 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis 1b Western Flora, Western Australia 110925 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis cernua 1 SSE of Mandamados, Lesvos, Greece 100514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis cernua 2 SSE of Mandamados, Lesvos, Greece 100514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis cf cernua 1 Manawatu River Estuary Wetland NZ 151112 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 1 SE of Nörre Vorupör, Jylland DK 950807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 2 southernmost tip of Skeingesjön, Skåne 820709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 3 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 4 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 5 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 6 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 1 Falsterbo, Skåne 920601 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 2 Falsterbo, Skåne 920601 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 4 Stenshuvud, Södra Mellby Sk 140520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 9 Skanörs Ljung Sk 160820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis 2a Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis 2b Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis 2c Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis 2d Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis 2e Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis cernua 3 SSE of Mandamados, Lesvos, Greece 100514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis cf cernua 2 Manawatu River Estuary Wetland NZ 151112 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis cf cernua 3 Manawatu River Estuary Wetland NZ 151112 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 10 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 11 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 12 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 13 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 14 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 7 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 8 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis fluitans 9 E of Arnborg, Jylland DK 140801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 10 Skanörs Ljung Sk 160820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 11 Skanörs Ljung Sk 160820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 12 Skanörs Ljung Sk 160820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 13 Skanörs Ljung Sk 160820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 3 Stenshuvud, Södra Mellby Sk 140520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 5 Stenshuvud, Södra Mellby Sk 140520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 6 Stenshuvud, Södra Mellby Sk 140520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 7 Stenshuvud, Södra Mellby Sk 140520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Isolepis setacea 8 Stenshuvud, Södra Mellby Sk 140520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).