Lyrella hennedyi (W. Smith) Stickle & D.G. Mann

Al-Handal, Adil Y., Thomas, Evan W. & Pennesi, Chiara, 2018, Marine benthic diatoms in the newly discovered coral reefs, off Basra coast, Southern Iraq, Phytotaxa 372 (2), pp. 111-152 : 117-119

Lyrella hennedyi (W. Smith) Stickle & D.G. Mann in Round et al. (1990: 672) ( Fig. 15 )

References: Hustedt 1961–66, p. 453, fig. 1516; Desikachary, 1989, pl.629, figs 1,3,4,5,9; Witkowski et al. 2000, p. 233, pl. 95, fig.3, pl.98, fig.4

Features: Length 42–64 μm, width 26–44 μm, striae 12–18 in 10 μm.

Description: Valves broadly elliptical with rounded apices and straight raphe fissures. Hyaline lateral areas broadly lanceolate becoming narrower near the apices. Transapical striae parallel at the center and radiate at the poles.

Remarks: All observed specimens were with higher striae density, normally L. hennedyi possesses 9–11 striae in 10 μm.

Ecology and Distribution: A widely distributed marine species. Previously reported from the Gulf ( Hendey 1970,

Al-Handal 2009). Frequent in Basra corals.

Figures

FIGURES 11–20. Marine benthic diatoms in the coral reefs off Basra. Fig. 11. Actinocyclus curvatulus, Fig. 12. Actinocyclus octonarius, Fig. 13. Lyrella abrupta, Fig. 14. Lyrella clavata, Fig. 15. Lyrella hennedyi, Fig. 16. Lyrella hennedyi var. subcarinata, Fig. 17, Lyrella spectabilis, Fig. 18. Petroneis granulata, Fig. 19. Petroneis marina, Fig. 20. Petroneis sp.