Moralesonia sp.

Williams, David M., Georgiev, Tsvetoslav, Schuster, Tanja M. & Wetzel, Carlos E., 2024, The relationships of Eunotogramma frauenfeldii (Bacillariophyta) I. An account of its structure and description of the new genus Moralesonia, Plant Ecology and Evolution 157 (3), pp. 270-290 : 270-290

Moralesonia sp.

Figs 8 , 9 A – I

Analysed material.

ECUADOR • Galápagos Islands, Punta Espinosa, beach from Fernandina (Narborough) Island ; 27 Jan. [19] 67; I. L. Wiggins in Hendey (1971: 385, figs 16–18, CAS 211014–6 , hypotypes 20032–20034, acc. no. 40287); BM 105488 ! (= Hendey 6702), BM 105494 ! (= Hendey 6708 = Fig. 8 E, F ), BM 105495 ! (= Hendey 6709), BM 105516 ! (= Hendey 6730) (Fig. 8 C, D ) • “ Galápagos Islands, Santa Cruz […] 16 th Aug. 1986, J. A. Broadhead ” in Stidolph et al. (2012: pl. 24, fig. 58 = our Fig. 8 B , https://pubs.usgs.gov/of/2012/1163/pages/Plates/24_Galapagos.pdf and https://planktonnet.awi.de/index.php?contenttype=image_details&itemid=60816#content) .

BRAZIL • Pernambuco; J. D. Möller no. 893 [ Möller 1889]; BM 31716 ! (Fig. 9 A – C , one specimen), BRM HB- 21 .

PHILIPPINES • Cebu (“ Zebu ”); L. H. [ardman] | no. 4001 (Fig. 9 G , one specimen); BM 10790 !.

SOUTHERN PACIFIC OCEAN • J. D. Möller no. 24 [ Möller 1892: 139: “ Südlicher Stiller Ocean ”] • J. D. Möller no. 832 [ Möller 1897: 17].

PACIFIC OCEAN • Bahía Magdalena, sediments ( BMS) [ López Fuerte et al. 2010: pl. 14, figs 1, 2, smaller valves with two bars, not quite joining at centre].

COUNTRY UNKNOWN • s. loc.; BM Adams D 875! (“ Fundort? [locality?] ”; many selected specimens, valve and girdle views, Fig. 4 L, M ); BM 104871 ! (Hendey 6060, 3 specimens) .

Analysed fossil material.

UNITED STATES • California, ‘ Patos guano’; BM 41317 ! (Payne 7818) (Fig. 9 D, H – I ) .

UNITED KINGDOM • Nottingham; BM Adams GC 1451! (Tempère) (Fig. 9 E ).

HUNGARY • Castel; BM Adams H 885! (F. Adams) (Fig. 9 F ).

Notes.

Hendey’s unpublished drawings of the specimens found in the Galápagos Islands are reproduced here as Fig. 8 A and some of the specimens are illustrated in Fig. 8 C – F . Again, these have a superficial ‘ similarity’ to the African specimens but, as yet, no specific character has been identified to associate them with Moralesonia frauenfeldii or to describe these specimens as a separate taxon. The three unpublished drawings are said to be from slides ‘ Hendey 6701 ’ (= BM 105487 ), ‘ Hendey 6708 ’ (= BM 105493 ), and ‘ Hendey 6730 ’ (= BM 105516 ). Slide ‘ Hendey 6701 ’ (= BM 105487 ) must be an error for 6702 (6701 is from San Diego; 6702 is labelled Eunotogramma frauenfeldii ). In addition to the notebook, there are a series of unpublished Icones Diatomaceaearum documenting the Galápagos Islands study ( Hendey 1971).

Figures

Figure 4. A – F. Moralesonia frauenfeldii, specimens from BM 57572, isolectotype (scale bar = 20 µm); note that it is a slide made form Grunow sample 790. G – I. Moralesonia frauenfeldii, specimens from BM 10889 (“ Kalkbai Cap d. g. Hoffn. ”, L. H. [ardman] | 1132 ” (scale bar = 20 µm), isolectotype. J – K. Moralesonia frauenfeldii reproduced from Van Heurck (1883: pl. 126, fig. 14) and a reproduction in Grunow’s drawing collection for his sample 790 in W. L, M. specimens from BM Adams D 875 (“ Fundort? [locality?] ”).

Figure 8. Moralesonia sp. A. Hendey’s unpublished drawings of the specimens found in the Galápagos Islands. B. Reproduced from Stidolph et al. (2012: pl. 24, fig. 58 [inverted], Ecuador, “ Galápagos Islands, Santa Cruz […] 16 th Aug. 1986, J. A. Broadhead ”), scale bar = 30 μm. C – F. Some of Hendey’s specimens. C – D. Ecuador, Galápagos Islands, Punta Espinosa, beach from Fernandina (Narborough) Island, 27 th Jan. [19] 67, I. L. Wiggins, BM 105516 (Hendey 6730). E – F. BM 105494 (Hendey 6708). G. “ Eunotogramma frauenfeldii ”, image from Hendey ms collection; specimen dimensions: 80 × 27 μm, scale bar = 20 µm.

Figure 9. A – I. Moralesonia sp. A – C. BM 31716, Brazil, Pernambuco, J. D. Möller [no. 893, 1889], one specimen, scale bar = 20 µm. D, H, I. Fossil material, BM 41317, Payne 7818, United States, California, “ Patos guano ”, specimen 71 × 25 µm, scale bar = 20 µm. E. BM Adams GC 1451, Tempère, Nottingham, specimen 64 × 29 µm, scale bar = 20 µm. F. BM Adams H 885, F. Adams, Hungary, Castel, specimen 72 × 23 µm, scale bar = 20 µm. G. BM 10790, L. H. [ardman] | no. 4001, Philippines, Cebu [“ Zebu ”], one specimen, specimen 64 × 29 µm, scale bar = 20 µm. J. Moralesonia frauenfeldii, BM Adams GC 1450, East Africa, Ibo, ex W. A. Firth, scale bar = 20 µm.