20:
150:
While studying the Naiad-shells of the upper Ohio-drainage, the fact was forced upon my mind, that certain species which inhabit the headwaters and smaller streams are represented, in the larger streams, by different, but very similar forms, which are distinguished from them chiefly by one character,
145:
with a special focus on the geographical distribution of species was a fundamental groundwork that is even valid today. In 1920, he formulated "Ortmann's Law of Stream
Position", which said that a species of mussels can have a different appearance depending on where in a river system the individuals
151:
namely obesity. The headwater-forms are rather compressed or flat, the large-river-forms more convex and swollen. I also found that in the rivers of medium size intergrades between the extremes are actually present.
276:
460:
465:
339:
161:
This observation helped greatly to simplify the taxonomy of molluscs, because previously, researchers had all too often assigned such different
255:
450:
440:
173:
415:
430:
455:
114:
445:
125:
In 1925, he became the chair of zoology at the
University of Pittsburgh. He died in Pittsburgh on January 3, 1927.
435:
251:
420:
374:
99:
410:
312:
177:
118:
110:
79:
75:
425:
335:"The geographical distribution of freshwater decapods and its bearing upon ancient geography"
102:
in 1897. In 1899, he participated in the Peary Relief expedition, and one year later, he was
405:
400:
304:
204:
95:
8:
223:
366:
348:
134:
71:
63:
334:
309:
Some
Biogeographers, Evolutionists and Ecologists: Chrono-Biographical Sketches
181:
103:
394:
87:
59:
162:
142:
39:
31:
352:
51:
30:(April 8, 1863 – January 3, 1927) was a Prussian-born United States
200:
83:
166:
91:
55:
35:
117:
and from 1910 on, he was professor of physical geography at the
16:
Prussian-born United States naturalist and zoologist (1863-1927)
215:
138:
19:
122:
121:, where he also obtained in 1911 the additional degree of an
82:. Together with Haeckel, he participated in an expedition to
67:
305:"Ortmann, Arnold Edward (Prussia-United States 1863-1927)"
113:. He became the curator of invertebrate zoology at the
461:
Emigrants from the German Empire to the United States
86:in 1890/91. Three years later, he emigrated to the
94:of the department of invertebrate paleontology at
78:. From 1886 on, he worked as an instructor at the
340:Proceedings of the American Philosophical Society
302:
392:
196:("Foundations of marine animal geography", 1886)
176:"A.E.Ortmann" is used to indicate Ortmann when
332:
466:Members of the American Philosophical Society
227:for a time, and contributed to periodicals.
256:University of Illinois at Urbana–Champaign
245:
243:
241:
239:
18:
298:
296:
236:
393:
367:"Ortmann, Arnold Edward (1863-1927)"
293:
249:
209:Klassen und Ordnungen des Tierreichs
194:GrundzĂĽge der Marinen Tiergeographie
13:
14:
477:
451:University of Pittsburgh faculty
441:20th-century American zoologists
187:
58:on April 8, 1863. A student of
416:19th-century German zoologists
375:International Plant Name Index
359:
326:
269:
100:American Philosophical Society
1:
230:
90:, where he got a post as the
70:; he had also studied at the
45:
7:
313:Western Kentucky University
221:He was associate editor of
10:
482:
431:Scientists from Pittsburgh
303:Smith, Charles H. (2005).
456:University of Jena alumni
156:A. E. Ortmann (1920)
119:University of Pittsburgh
98:. He was elected to the
80:University of Strasbourg
76:University of Strasbourg
62:, he graduated from the
446:American carcinologists
333:Ortmann, A. E. (1920).
252:"Arnold Edward Ortmann"
128:
436:American malacologists
159:
137:studies of freshwater
24:
421:German carcinologists
199:Continuation of "Die
148:
109:In 1903, he moved to
28:Arnold Edward Ortmann
22:
411:German malacologists
281:search.amphilsoc.org
277:"APS Member History"
96:Princeton University
50:Ortmann was born in
224:American Naturalist
174:author abbreviation
133:Ortmann's thorough
106:as a U.S. citizen.
38:who specialized in
72:University of Kiel
64:University of Jena
25:
250:Cummings, Kevin.
473:
386:
385:
383:
381:
363:
357:
356:
347:(171): 267–400.
330:
324:
323:
321:
319:
300:
291:
290:
288:
287:
273:
267:
266:
264:
262:
247:
157:
481:
480:
476:
475:
474:
472:
471:
470:
391:
390:
389:
379:
377:
365:
364:
360:
331:
327:
317:
315:
301:
294:
285:
283:
275:
274:
270:
260:
258:
248:
237:
233:
190:
158:
155:
131:
115:Carnegie Museum
66:in 1885 with a
48:
17:
12:
11:
5:
479:
469:
468:
463:
458:
453:
448:
443:
438:
433:
428:
423:
418:
413:
408:
403:
388:
387:
371:Author details
358:
325:
292:
268:
234:
232:
229:
219:
218:
212:
197:
189:
186:
182:botanical name
153:
130:
127:
47:
44:
15:
9:
6:
4:
3:
2:
478:
467:
464:
462:
459:
457:
454:
452:
449:
447:
444:
442:
439:
437:
434:
432:
429:
427:
426:Conchologists
424:
422:
419:
417:
414:
412:
409:
407:
404:
402:
399:
398:
396:
376:
372:
368:
362:
354:
350:
346:
342:
341:
336:
329:
314:
310:
306:
299:
297:
282:
278:
272:
257:
253:
246:
244:
242:
240:
235:
228:
226:
225:
216:
213:
210:
206:
202:
198:
195:
192:
191:
185:
183:
179:
175:
172:The standard
170:
168:
165:to different
164:
152:
147:
144:
140:
136:
126:
124:
120:
116:
112:
107:
105:
101:
97:
93:
89:
88:United States
85:
81:
77:
73:
69:
65:
61:
60:Ernst Haeckel
57:
53:
43:
41:
37:
33:
29:
21:
378:. Retrieved
370:
361:
344:
338:
328:
316:. Retrieved
308:
284:. Retrieved
280:
271:
259:. Retrieved
222:
220:
214:
208:
193:
188:Publications
171:
160:
149:
132:
108:
49:
27:
26:
23:A.E. Ortmann
406:1927 deaths
401:1863 births
211:(1898-1900)
163:morphotypes
143:crustaceans
104:naturalized
395:Categories
286:2024-02-20
231:References
111:Pittsburgh
40:malacology
32:naturalist
380:August 5,
318:August 5,
201:Decapodon
135:taxonomic
52:Magdeburg
46:Biography
36:zoologist
154:—
84:Zanzibar
74:and the
261:16 July
203:" from
167:species
139:mussels
92:curator
56:Prussia
353:983485
351:
217:(1902)
178:citing
146:live:
349:JSTOR
205:Bronn
123:Sc.D.
68:Ph.D.
382:2013
320:2013
263:2022
141:and
129:Work
34:and
207:'s
42:.
397::
373:.
369:.
345:41
343:.
337:.
311:.
307:.
295:^
279:.
254:.
238:^
184:.
180:a
169:.
54:,
384:.
355:.
322:.
289:.
265:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
