Index Nominum Algarum Image Index

459 CARD IMAGES
beginning with PROTOPERIDINIUM

1. PROTOPERIDINIUM Bergh
2. PROTOPERIDINIUM {subgenera MINUSCULUM (Lebour) Balech}
3. PROTOPERIDINIUM (Gran) Balech {subgenus of Protoperidinium}
4. PROTOPERIDINIUM (Bergh) Ostenfeld {Subgen.}
5. PROTOPERIDINIUM (Bergh) Paulsen {Subgenus}
6. Protoperidinium abei (Paulsen) Balech
7. Protoperidinium achromaticum (Levander) Balech
8. Protoperidinium acutipes (Dangeard) Balech
9. Protoperidinium acutum (Karsten) Balech
10. Protoperidinium adeliense (Balech) Balech
11. Protoperidinium adense (Matzenauer) Balech
12. Protoperidinium adulterum (Balech) Balech
13. Protoperidinium affine (Balech) Balech
14. Protoperidinium africanoides (Dangeard) Balech
15. Protoperidinium aliferum (Gaarder) Balech
16. Protoperidinium americanum (Gran & Braarud) Balech
17. Protoperidinium amplum (Matzenauer) Balech
18. Protoperidinium ampulla (Balech) Balech
19. Protoperidinium anceps (Meunier) Balech
20. Protoperidinium anguipes (Balech) Balech
21. Protoperidinium angustum (Dangeard) Balech
22. Protoperidinium anomaloplaxum (Balech) Balech
23. Protoperidinium antarcticum (Schimper) Balech
24. Protoperidinium anthonyi (Faulré Fremiet) Balech
25. Protoperidinium applanatum (Mangin) Balech
26. Protoperidinium archiovatum (Balech) Balech
27. Protoperidinium areolatum (Peters) Balech
28. Protoperidinium asperum (Wailes) Balech
29. Protoperidinium aspidiotum (Balech) Balech
30. Protoperidinium asymmetricum (Abé) Balech
31. Protoperidinium avellana (Meunier) Balech
32. Protoperidinium balechii (R. Akselman) E. Balech
33. Protoperidinium bellulum (Balech) Balech
34. Protoperidinium biconicum (Dangeard) Balech
35. Protoperidinium bimucronatum (Schiller) Balech
36. Protoperidinium bipatens Balech {nomen; "en prensa"}
37. Protoperidinium bipes (Paulsen) Balech
38. Protoperidinium bispinum (Schiller) Balech
39. Protoperidinium braarudii ('braarudi') (Schiller) Balech
40. Protoperidinium brachypus (Schiller) Balech
41. Protoperidinium brevipes (Paulsen) Balech
42. Protoperidinium brintonii ('brintoni') (Balech) Balech
43. Protoperidinium brochii ('brochi') (Kofoid & Swezy) Balech
44. Protoperidinium bulbosum (Gaarder) Balech
45. Protoperidinium bulla (Meunier) Balech
46. Protoperidinium capdevillei (Balech) Balech
47. Protoperidinium capurroi (Balech) Balech
48. Protoperidinium capurroi ssp. subpellucidum (E. Balech) E. Balech
49. Protoperidinium cassum (Balech) Balech
50. Protoperidinium cassum var. decens (E. Balech) E. Balech
51. Protoperidinium castaneiforme (Mangin) Balech
52. Protoperidinium cavispinum (Mangin) Balech
53. Protoperidinium cepa (Balech) Balech
54. Protoperidinium cerasus (Paulsen) Balech
55. Protoperidinium charcotii ('charcoti') (Balech) Balech
56. Protoperidinium claudicans (Paulsen) Balech
57. Protoperidinium colombonense (Matzenauer) Balech
58. Protoperidinium compressum (Abé) Balech
59. Protoperidinium concavum (Mangin) Balech
60. Protoperidinium concavum subsp. radius (Balech) Balech
61. Protoperidinium conicoides (Paulsen) Balech
62. Protoperidinium conicum (Gran) Balech
63. Protoperidinium constrictum (Abé) Balech
64. Protoperidinium corniculum (Kofoid & Michener) F.J.R. Taylor & E. Balech
65. Protoperidinium cornutum (Karsten) Balech
66. Protoperidinium crassipes (Kofoid) Balech
67. Protoperidinium crassipyrum (Balech) Balech
68. Protoperidinium cruciferum (Balech) Balech
69. Protoperidinium curtipes (Jürgensen) Balech
70. Protoperidinium curvipes (Ostenfeld) Balech
71. Protoperidinium dakariense (Dangeard) Balech
72. Protoperidinium decens (Balech) Balech
73. Protoperidinium decipiens (Jürgensen) Parke & Dodge
74. Protoperidinium decollatum (Balech) Balech
75. Protoperidinium defectum (Balech) Balech
76. Protoperidinium deficiens (Meunier) Balech
77. Protoperidinium denticulatum (Gran & Braarud) Balech
78. Protoperidinium depressum (Bailey) Balech
79. Protoperidinium diabolus (Cleve) Balech
80. Protoperidinium digitale Pouchet
81. Protoperidinium discoides_('discoideum') (Wailes) Balech
82. Protoperidinium distans (Mangin) Balech
83. Protoperidinium divaricatum (Meunier) Parke & Dodge
84. Protoperidinium divergens (Ehrenberg) Balech
85. Protoperidinium elegans (Cleve) Balech
86. Protoperidinium elegantissimum (Balech) Balech
87. Protoperidinium ellipsoides (Dangeard) Balech
88. Protoperidinium ellipsoideum (Mangin) Balech
89. Protoperidinium elongatum (Meunier) Balech
90. Protoperidinium excentricum (Paulsen) Balech
91. Protoperidinium exiguum (Cleve) Balech
92. Protoperidinium fatulipes (Kofoid) Balech
93. Protoperidinium fimbriatum (Meunier) Balech
94. Protoperidinium finlandicum (Paulsen) Balech
95. Protoperidinium formosum (Pavillard) Balech
96. Protoperidinium gaarderae (Balech) Balech
97. Protoperidinium gainii (Dangeard) Balech
98. Protoperidinium gibbosum (Matzenauer) Balech
99. Protoperidinium globosum (Dangeard) Balech
100. Protoperidinium globulus (Stein) Balech
101. Protoperidinium grande (Kofoid) Balech
102. Protoperidinium granii ('grani') (Ostenfeld) Balech
103. Protoperidinium grenlandicum (Woloszynska) Balech
104. Protoperidinium hangoei (J. Schiller) J. Lewis, J.D. Dodge, & P. Tett
105. Protoperidinium helix (Balech) Balech
106. Protoperidinium hemisphaericum (T.H. Abe) E. Balech
107. Protoperidinium heteracanthum (Dangeard) Balech
108. Protoperidinium heteroconicum (Matzenauer) Balech
109. Protoperidinium heterospinum (Gaarder) Balech
110. Protoperidinium hirobis (Abé) Balech
111. Protoperidinium huberi (Schiller) Balech
112. Protoperidinium humile (Schiller) Balech
113. Protoperidinium hyalinum (Meunier) Balech
114. Protoperidinium imitatio E. Balech
115. Protoperidinium inclinatum (Balech) Balech
116. Protoperidinium incognitum (Balech) Balech
117. Protoperidinium inflatiforme (Böhm) Balech
118. Protoperidinium islandicum (Paulsen) Balech
119. Protoperidinium joergensenii ('joergenseni') (Balech) Balech
120. Protoperidinium joergensenii var. luculentum E. Balech
121. Protoperidinium joubinii ('joubini') (Dangeard) Balech
122. Protoperidinium karstenii V. Srinivasan
123. Protoperidinium laticeps (Grøntved & Seidenfaden) Balech
124. Protoperidinium latidorsale (Dangeard) Balech
125. Protoperidinium latipyrum (Balech) Balech
126. Protoperidinium latispinum (Mangin) Balech
127. Protoperidinium latissimum (Kofoid) Balech
128. Protoperidinium latistriatum (Balech) Balech
129. Protoperidinium leonis (Pavillard) Balech
130. Protoperidinium limbatum Stokes
131. Protoperidinium lipopodium (Balech) Balech
132. Protoperidinium longipes (Karsten) Balech
133. Protoperidinium longispinum (Kofoid) Balech
134. Protoperidinium magnum (Schiller) Balech
135. Protoperidinium majus (Dangeard) Balech
136. Protoperidinium manginii ('mangini') (Balech) Balech
137. Protoperidinium marielebouriae_('marielebourae') (Paulsen) Balech
138. Protoperidinium marukawae ('marukawai') (Abé) Balech
139. Protoperidinium mastophorum (Balech) Balech
140. Protoperidinium matzenaueri (Böhm) Balech
141. Protoperidinium mediocre (Balech) Balech
142. Protoperidinium mediterraneum (Kofoid) Balech
143. Protoperidinium melo (Balech) Balech
144. Protoperidinium mendiolae Balech
145. Protoperidinium metananum (Balech) Balech
146. Protoperidinium michaelis (Ehrenberg) Bergh
147. Protoperidinium minus (Mangin) Balech
148. Protoperidinium minutissimum (Mangin) Balech
149. Protoperidinium minutum (Kofoid) A. R. Loeblich III
150. Protoperidinium mite (Pavillard) Balech
151. Protoperidinium monovelum (Abé) Balech
152. Protoperidinium munobis (Abé) Balech
153. Protoperidinium mutsuense (Abé) Balech
154. Protoperidinium nanum (Balech) Balech
155. Protoperidinium nipponicum (Abé) Balech
156. Protoperidinium norpacense (Balech) Balech
157. Protoperidinium novascotiense ('novastotiense') (Gran & Braarud) Balech
158. Protoperidinium nudum (Meunier) Balech
159. Protoperidinium nux (Schiller) Balech
160. Protoperidinium obesum (Matzenauer) Balech
161. Protoperidinium obtusipes (Mangin) Balech
162. Protoperidinium obtusum (Karsten) Parke & Dodge
163. Protoperidinium oceanicum (Vanhöffen) Balech
164. Protoperidinium okamurae ('okamurai') (Abé) Balech
165. Protoperidinium orientale (Matzenauer) Balech
166. Protoperidinium ovatoides ('ovatoide') (Meunier) Balech
167. Protoperidinium ovatum Pouchet
168. Protoperidinium ovatum ssp. asymmetricum (P. Dangeard) E. Balech
169. Protoperidinium ovatum var. symmetricum Dangeard
170. Protoperidinium oviforme (Dangeard) Balech
171. Protoperidinium ovum (Schiller) Balech
172. Protoperidinium pacificum (Kofoid & Michener) F.J.R. Taylor & E. Balech
173. Protoperidinium pallidum (Ostenfeld) Balech
174. Protoperidinium pallidum ssp. daedalum Balech
175. Protoperidinium parapyriforme (Hermosilla) Balech
176. Protoperidinium parcum (Balech) Balech
177. Protoperidinium parthenopes A. Zingone & M. Montresor
178. Protoperidinium parvicollum (Balech) Balech
179. Protoperidinium parvispinum (Gaarder) Balech
180. Protoperidinium parviventer Balech
181. Protoperidinium patagonicum (Balech) Balech
182. Protoperidinium patens (Dangeard) Balech
183. Protoperidinium paulsenii_('paulseni') (Pavillard) Balech
184. Protoperidinium pedunculatum (Schütt) Balech
185. Protoperidinium pellucidum Bergh
186. Protoperidinium pellucidum var. olla Pouchet
187. Protoperidinium pellucidum ssp. stellatum Balech
188. Protoperidinium penitum (Balech) Balech
189. Protoperidinium pentagonum (Gran) Balech
190. Protoperidinium perplexum (Balech) Balech
191. Protoperidinium perradiatum Balech
192. Protoperidinium peruvianum (Balech) Balech
193. Protoperidinium pietschmannii ('pietschmanni') (Böhm) Balech
194. Protoperidinium pouchetii ('poucheti') (Kofoid & Michener) F.J.R. Taylor & E. Balech
195. Protoperidinium pseudoantarcticum (Balech) Balech
196. Protoperidinium punctulatum (Paulsen) Balech
197. Protoperidinium pyriforme (Paulsen) Balech
198. Protoperidinium pyriforme ssp. breve (Paulsen) E. Balech
199. Protoperidinium pyrophorum (Ehr.) Pouchet
200. Protoperidinium pyrum (Balech) Balech
201. Protoperidinium quadratum (Matzenauer) Balech
202. Protoperidinium quarnerense (B. Schröder) Balech
203. Protoperidinium quinquecorne (Abé) Balech
204. Protoperidinium rampii (Balech) Balech
205. Protoperidinium raphanum (Balech) Balech
206. Protoperidinium rectiforme (Schiller) Balech
207. Protoperidinium rectum (Kofoid) Balech
208. Protoperidinium remotum (Karsten) Balech
209. Protoperidinium retiferum (Matzenauer) Balech
210. Protoperidinium rosaceum (Balech) Balech
211. Protoperidinium roscoffiense (Balech) Balech
212. Protoperidinium roseum (Paulsen) Balech
213. Protoperidinium saltans (Meunier) Balech
214. Protoperidinium schilleri (Paulsen) Balech
215. Protoperidinium simulum (Paulsen) Balech
216. Protoperidinium sinaicum (Matzenauer) Balech
217. Protoperidinium solidicorne (Mangin) Balech
218. Protoperidinium solitarium (Abé) Balech
219. Protoperidinium somma (Matzenauer) Balech
220. Protoperidinium sphaericum (Murray & Whitting) Balech
221. Protoperidinium sphaeroides (Dangeard) Balech
222. Protoperidinium sphaeroideum (Mangin) Balech
223. Protoperidinium spiniferum (Schiller) Balech
224. Protoperidinium spirale (Gaarder) Balech
225. Protoperidinium steidingerae Balech
226. Protoperidinium steinii_('steini')
227. Protoperidinium styliferum (Schiller) Balech
228. Protoperidinium subcrassipes E. Balech
229. Protoperidinium subinerme (Paulsen) A.R. Loeblich III
230. Protoperidinium subpunctulatum (Wailes) Balech
231. Protoperidinium subpyriforme (Dangeard) Balech
232. Protoperidinium subsphaericum (Balech) Balech
233. Protoperidinium sylvanae (Dangeard) Balech
234. Protoperidinium symmetricum (Halim) Balech
235. Protoperidinium taeningii ('taeningi') (Rampi) Balech
236. Protoperidinium tenuissimum (Kofoid) Balech
237. Protoperidinium thorianum (Paulsen) Balech
238. Protoperidinium thulesense ('thulsesense') (Balech) Balech
239. Protoperidinium tregouboffii_('tregouboffi') (Halim) Balech
240. Protoperidinium tristylum (Stein) Balech
241. Protoperidinium truncatum (Graham) Balech
242. Protoperidinium truncum (Abé) Balech
243. Protoperidinium tuba (Schiller) Balech
244. Protoperidinium tumidum (Okamura) E. Balech
245. Protoperidinium turbinatum (Mangin) Balech
246. Protoperidinium turgidum (Meunier) Balech
247. Protoperidinium unipes (Balech) Balech
248. Protoperidinium variegatum (Peters) Balech
249. Protoperidinium ventrale (Abé) Balech
250. Protoperidinium ventricum (Abé) Balech
251. Protoperidinium venustum (Matzenauer) Balech
252. Protoperidinium venustum var. facetum E. Balech
253. Protoperidinium verrucosum (Meunier) Balech
254. Protoperidinium viride Pouchet
255. Protoperidinium volsella (Margalef) Balech
256. Protoperidinium wiesneri (Schiller) Balech
257. Protoperidinium woloszynskae (Conrad) Parke & Dodge
258. Protoperidinium yserense (Meunier) Balech
259. Protophyllum apodum Rostafinski
260. PROTOPSIS Kofoid & Swezy
261. Protopsis elongata Schiller
262. Protopsis neapolitana Kofoid
263. Protopsis nigra (Pouchet) Kofoid & Swezy
264. Protopsis simplex Lebour
265. PROTORAPHIS Simonsen
266. Protoraphis atlantica R.A. Gibson CAS
267. Protoraphis hustedtiana Simonsen CAS
268. Protoraphis hustedtiana f. latior Foged CAS
269. PROTORHIZOCHRYSIDIS Skvortzov
270. PROTORHIZOCHRYSIDIS Skvortzov
271. PROTORHIZOCHRYSIDIS Skvortzov
272. Protorhizochrysidis furcata Skvortzov
273. Protorhizochrysidis furcata Skvortzov
274. Protorhizochrysidis furcata Skvortzov
275. Protorhizochrysidis leucosini Skvortzov
276. Protorhizochrysidis stellata Skvortzov & Noda
277. Protorhizochrysidis stellata Skvortzov
278. PROTOSIPHON Klebs
279. Protosiphon botryoides (Kützing) Klebs
280. Protosiphon botryoides var. deserti Nayal
281. Protosiphon botryoides f. parieticola Iyengar
282. Protosiphon cinnamomeus (Meneghini) Drouet & Daily
283. PROTOSPHAERIA Turpin
284. Protosphaeria atrovirens (Corda) Trevisan
285. Protosphaeria aurea (Kützing) Trevisan
286. Protosphaeria chlamidomonas (Kützing) Trevisan
287. Protosphaeria clementii (Kützing) Trevisan
288. Protosphaeria coccoma (Kützing) Trevisan
289. Protosphaeria cordae (Meneghini) Trevisan
290. Protosphaeria dalmatica (Zanardini) Trevisan
291. Protosphaeria grevillei (C. Agardh) Trevisan
292. Protosphaeria macrococca (Kützing) Trevisan
293. Protosphaeria montagnei (Meneghini) Trevisan
294. Protosphaeria orsinii (Meneghini) Trevisan
295. Protosphaeria pluvialis (Flotow) Trevisan
296. Protosphaeria sabulosa (Kützing) Trevisan
297. Protosphaeria simplex Turpin
298. Protosphaeria violacea (Corda) Trevisan
299. Protosphaeria viridis (Schreber) Trevisan
300. PROTOSPHAERIDIUM Timofeev
301. Protosphaeridium acis Timofeev
302. Protosphaeridium asaphum Timofeev
303. Protosphaeridium densum Timofeev
304. Protosphaeridium flexuosum Timofeev
305. Protosphaeridium fuscipetiolatum F. Cramer & Díez
306. Protosphaeridium gibberosum Timofeev
307. Protosphaeridium laccatum Timofeev
308. Protosphaeridium paleaceum Timofeev
309. Protosphaeridium papyraceum Timofeev
310. Protosphaeridium parvulum Timofeev
311. Protosphaeridium patelliforme Timofeev
312. Protosphaeridium pusillum Timofeev
313. Protosphaeridium rigidulum Timofeev
314. Protosphaeridium scabridum Timofeev
315. Protosphaeridium torulosum Timofeev
316. Protosphaeridium tuberculiferum Timofeev
317. Protosphaeridium vermium Timofeev
318. Protosphaeridium volkovae P.K. Maithy & M. Shukla
319. PROTOSPONGIA W.S. Kent
320. Protospongia haeckelii ('haeckeli') W.S. Kent
321. Protospongia haeckelii var. clarkii J. Schiller
322. Protospongia haeckelii var. gracilis Skuja
323. Protospongia nana Braarud
324. Protospongia pedicellata Oxley
325. PROTOTAXITES J. W. Dawson
326. Prototaxites hicksii Dawson
327. Prototaxites loganii ('logani') J. W. Dawson
328. PROTOTHECA Krüger
329. Prototheca chlorelloides Auct.
330. Prototheca chlorelloides Beijerinck
331. Prototheca ciferrii Negroni & Blaisten
332. Prototheca crieana (Ludwig) R. Ciferri
333. Prototheca filamenta {info}
334. Prototheca kruegeri ('krügeri') E.G. Pringsheim
335. Prototheca moriformis Krüger
336. Prototheca moriformis Krüger
337. Prototheca moriformis var. betulinus Chodat
338. Prototheca portoricensis Ciferri, Ashford & Dalmau
339. Prototheca portoricensis var. ciferrii (Negoni & Blaisten) R. Ciferri, Montemartini & O. Ciferri
340. Prototheca portoricensis var. trispora Ciferri, Ashford & Dalmau
341. Prototheca segbwema Davies, Spencer & Wakelin
342. Prototheca stagnorum_('stagnora') W.B. Cooke
343. Prototheca trispora (Ciferri, Ashford & Dalmau) R. Ciferri, Montemartini & O. Ciferri
344. Prototheca viscosa E.G. Pringsheim
345. Prototheca wickerhamii Tubaki & Soneda
346. Prototheca zopfii Krüger
347. Prototheca zopfii Krüger
348. PROTOTHECELLA Nadakavukaren & McCracken
349. PROTOTILOPTERIS Funk
350. Prototilopteris bertholdii ('bertholdi') Funk
351. PROTOTRACHYSPHAERIDIUM Timofeev
352. Prototrachysphaeridium staplinii ('staplini') Timofeev
353. PROTOTRACTOMONAS Skvortzov
354. Prototractomonas ovalis Skvortzov
355. Prototractomonas rotundata Skvortzov
356. PROTOTREMATOSPHAERIDIUM Timofeev
357. Prototrematosphaeridium holtedahlii ('holtedahli') Timofeev
358. PROTOTRICHONYMPHA M. Saleem
359. Prototrichonympha pristina (A. Imms) M. Saleem
360. PROTOUMBELLA Mamet
361. Protoumbella decurta (Reitlinger) Mamet
362. Protoumbella mica (Poyarkov) Mamet
363. Protoumbella saccaminiformis (Bykova) Mamet
364. PROTRICHOMONAS Alexeieff
365. Protrichomonas anatis Kotlán
366. Protrichomonas ruminantium (Braune) Levine
367. PROULOTHRIX Pascher {Section of Ulothrix}
368. PROVASOLIELLA Loeblich III
369. Provasoliella airensis Compère
370. Provasoliella albostriata (Pascher) Ettl
371. Provasoliella caudata (Pascher) Ettl
372. Provasoliella caudata var. guanophila (Skuja) Ettl
373. Provasoliella czettelii (Wawrik) Ettl
374. Provasoliella doelensis (Conrad & Kufferath) Ettl
375. Provasoliella gyoerffyi ('györffyi') (Kol) Ettl
376. Provasoliella lobata (Pascher) Ettl
377. Provasoliella maculata (L. Peterfi) Ettl
378. Provasoliella malleolata (Pascher) Ettl
379. Provasoliella nivalis (Kol) Ettl
380. Provasoliella oleifera (Korschikoff) Ettl
381. Provasoliella ovata (Jacobsen) Loeblich III
382. Provasoliella ovata var. makrops (Skuja) Ettl
383. Provasoliella saccata (Skuja) Ettl
384. Provasoliella simplicissima (Pascher) Ettl
385. Provasoliella sinica (Skvortzov) Ettl
386. Provasoliella transsylvanica (Kol) Ettl
387. Provasoliella vulgaris (H. Ettl & O. Ettl) Ettl
388. PROWAZEKELLA Alexeieff
389. Prowazekella lacertae (Grassi) Alexeieff
390. Prowazekella longifilum Lemmermann
391. PROWAZEKIA Hartmann & Chagas
392. Prowazekia cruzii ('cruzi') Hartmann & Chagas
393. Prowazekia josephi Belar
394. Prowazekia minuta Valkanov
395. Prowazekia ninae-kohl-yakimov ('ninae kohl-yakimov') Yakimov & Kolpakowa
396. Prowazekia saltans (Ehrenberg) Valkanov
397. PROWSEMONAS Skvortzov & Noda
398. Prowsemonas brasiliana Skvortzov & Noda
399. Prowsemonas hongkongensis Skvortzov & Noda
400. Prowsemonas tropica Skvortzov & Noda
401. PRYMNESIUM Massart
402. PRYMNESIUM Massart
403. Prymnesium annuliferum Billard
404. Prymnesium calathiferum Chang & Ryan
405. Prymnesium czosnowskii Starmach
406. Prymnesium minutum N. Carter
407. Prymnesium minutum Czosnowski
408. Prymnesium parvum N. Carter
409. Prymnesium patelliferum_('patellifera') Green, Hibberd & Pienaar
410. Prymnesium saltans Massart
411. Prymnesium zebrinum Billard
412. PSALIGONYAULAX Sarjeant
413. Psaligonyaulax apatela ('apaletum') (Cookson & Eisenack) Sarjeant
414. Psaligonyaulax apatela (Cookson & Eisenack) Sarjeant
415. Psaligonyaulax cypraea Ioannides, Stavrinos & Downie
416. Psaligonyaulax deflandrei Sarjeant
417. Psaligonyaulax galeatum (Cookson & Eisenack) R. J. Davey & Verdier
418. Psaligonyaulax simplicia (Cookson & Eisenack) Sarjeant
419. Psaligonyaulax simplicia (Cookson & Eisenack) Sarjeant
420. PSAMMOPHYLLUM Silva & Moe {nomen}
421. Psammophyllum californicum (J. Agardh) Silva & Moe {inval.}
422. PSAMMOSYNEDRA F.E. Round
423. Psammosynedra closterioides (Grunow) F.E. Round CAS
424. PSAMMOTHIDIUM L. Bukhtiyarova & F.E. Round
425. Psammothidium abundans (Manguin) Bukhtiyarova & F.E. Round CAS
426. Psammothidium abundans f. rosenstockii (Lange-Bertalot) Bukhtiyarova
427. Psammothidium altaicum (V.S. Poretzky) Bukhtiyarova
428. Psammothidium bioretii (H. Germain) Bukhtiyarova & F.E. Round CAS
429. Psammothidium bristolicum Bukhtiyarova
430. Psammothidium buccula (Cholnoky) Bukhtiyarova
431. Psammothidium didymum (Hustedt) Bukhtiyarova & F.E. Round CAS
432. Psammothidium frigidum (Hustedt) Bukhtiyarova & F.E. Round CAS
433. Psammothidium grischunum (Wuthrich) Bukhtiyarova & F.E. Round CAS
434. Psammothidium grischunum f. daonense ('daonensis') (Lange-Bertalot) Bukhtiyarova & F.E. Round
435. Psammothidium helveticum (Hustedt) L. Bukhtiyarova & F.E. Round CAS
436. Psammothidium investiens ('investians') (J.R. Carter) L. Bukhtiyarova
437. Psammothidium kuelbsii (Lange-Bertalot) L. Bukhtiyarova & F.E. Round CAS
438. Psammothidium lacus-vulcani (Lange-Bertalot & Krammer) L. Bukhtiyarova
439. Psammothidium lauenburgianum (Hustedt) L. Bukhtiyarova & F.E. Round CAS
440. Psammothidium levanderi (Hustedt) L. Bukhtiyarova & F.E. Round CAS
441. Psammothidium marginulatum (Grunow) L. Bukhtiyarova & F.E. Round CAS
442. Psammothidium pseudoswazi L. Bukhtiyarova & F.E. Round
443. Psammothidium punctulatum L. Bukhtiyarova & F.E. Round
444. Psammothidium reversum (Lange-Bertalot & Krammer) L. Bukhtiyarova & F.E. Round CAS
445. Psammothidium rossii (Hustedt) L. Bukhtiyarova & F.E. Round CAS
446. Psammothidium sacculus ('sacculum') (J.R. Carter) L. Bukhtiyarova
447. Psammothidium scoticum (R.J. Flower & V.J. Jones) Bukhtiyarova & F.E. Round CAS
448. Psammothidium stauroneioides ('stauroneioidum') (Manguin) Bukhtiyarova
449. Psammothidium strenzkei (Hustedt) Bukhtiyarova
450. Psammothidium subatomoides (Hustedt) Bukhtiyarova & Round CAS
451. Psammothidium ventrale ('ventralis') (Krasske) Bukhtiyarova & Round
452. PSELIODINIUM Sournia
453. Pseliodinium vaubanii Sournia
454. PSENOTOPUS Tappan & Loeblich Jr.
455. Psenotopus chondrocheus Tappan & Loeblich Jr.
456. PSEPHONEMA Skuja
457. Psephonema aenigmaticum Skuja
458. PSEPHOTAXUS W. West & G.S. West
459. Psephotaxus lamellosus W. West & G.S. West