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Arachnoidiscus abnormis Brown 1933, p. 41, 73
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| Status | Valid | |
| Comments | No illustration in Brown, but he cites a specimen illustrated in A. Schmidt’s Atlas, pl. 147, fig. 8 (Schmidt 1890, ref. 012467) as probably belonging to this species. |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus adamsii Brown 1933, p. 44, 63; pl. 5, fig. 4
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| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus beringensis Brown 1933, p. 47, 78; pl. 6, fig. 7
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| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus cibdelus Brown 1933, p. 46, 77
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| Comments | No illustration, but Brown cites an illustration in Schmidt’s Atlas: A. indicus sensu Schmidt 1881 pl. 68, fig. 8 (ref. 012454) (not Ehrenberg) |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus clarus Brown 1933, p. 46, 68; pl. 6, fig. 1, 2
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| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus cognatus Brown 1933, p. 43, 57; pl. 5, fig. 7
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| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus confusus Brown 1933, p. 42, 54
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| Status | Valid | |
| Comments | Brown does not provide a figure, but he cites A. ehrenbergii var. californica sensu Truan and Witt 1888 (ref. 000889) p. 11, and A. ehrenbergii sensu Truan and Witt (same work) pl. 2, fig. 8 (not Bailey) |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus decorus Brown 1933, p. 47, 71; pl. 6, fig. 3
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| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus deficiens (Grove in Schmidt) Brown 1933, p. 64; pl. 5, fig. 5
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| Basionym | Arachnoidiscus ehrenbergii Bailey (?) var. deficiens Grove in Schmidt et al. 1890 |
| Status | Valid | |
| Comments | Based on A. ehrenbergii var. deficiens Grove in Schmidt 1890 (ref. 012468) pro parte (includes figure 147/2, but not 147/3 from Schmidt 1890, ref. 012467) |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Collector | | Assessment of record accuracy | likely accurate |
| List of nomenclatural synonyms | Arachnoidiscus ehrenbergii var. deficiens Grove in Schmidt et al. 1890
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Arachnoidiscus ehrenbergii var. deficiens Grove in Schmidt et al. redefined by Brown 1933, p. 61
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| Comments | Name originally (Grove 1890, ref. 12468) applied to specimens illustrated as A. ehrenbergii var. oamaruensis in Schmidt1890, pl. 147, fig. 2-3 (ref. 012467). Only fig. 147/2 was retained by Brown 1933 (ref. 000172) in A. deficiens (Grove) Brown, in his revision of Arachnoidiscus (Brown placed fig. 147/3 in A. oamaruensis). |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | INA card not found. Click here to check this name in the INA website. |
| Collector | | Assessment of record accuracy | uncertain/not verified |
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Arachnoidiscus evanescens (Grunow in Schmidt et al.) Brown 1933, p. 74
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| Basionym | Arachnoidiscus ehrenbergii Bailey var. evanescens Grunow in Schmidt et al. 1881 |
| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Collector | | Assessment of record accuracy | likely accurate |
| List of nomenclatural synonyms | Arachnoidiscus ehrenbergii var. evanescens Grunow in Schmidt et al. 1881
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Arachnoidiscus evanescens var. paulus Brown 1933, p. 44, 75
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| Status | Valid | |
| Comments | Not illustrated by Brown. Brown cites A. indicus small var.? Schmidt’s Atlas (1881), pl. 68, fig. 9-10 (ref. 012454), and Wolle 1890, pl. 91, fig. 10-11 (ref. 000916) |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus hungaricus Brown 1933, p. 43, 61; pl. 5, fig. 6
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| Status | Valid | |
| Comments | Includes A. ehrenbergii var. californica Pantocsek 1886, and A. ehrenbergii var. indica Pantocsek 1886 |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus hybridus Brown 1933, p. 59; pl. 5, fig. 1
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| Status | Invalid? | |
| Comments | Description may be insufficient for valid publication of the name. |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus lepidus Brown 1933, p. 48, 76
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| Status | Valid | |
| Comments | Brown cites an unnamed illustration in A. Schmidt 1890 (ref. 012467): pl. 147, fig. 9 |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus longii Brown 1933, p. 41, 53; pl. 3, fig. 1
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| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus major Brown 1933, p. 41, 54
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| Status | Valid | |
| Comments | Description based on illustration of “A. ornatus var.” in Schmidt’s Atlas (1882) pl. 73, fig. 10 (ref. 012455) |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus oamaruensis (A. Schmidt) Brown 1933, p. 44, 60; pl. 5, fig. 2, 3
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| Basionym | Arachnoidiscus ehrenbergii Bailey (?) var. oamaruensis Schmidt in Schmidt et al. 1890 |
| Status | Valid | |
| Comments | Brown’s concept of Arachnoidiscus oamaruensis includes A. ehrenbergii var. oamaruensis Schmidt 1890, pl. 147, fig. 1, and A. ehrenbergii var. deficiens Grove in A. Schmidt et al. 1890, pl. 147, fig. 2 (ref. 012467) |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Collector | | Assessment of record accuracy | likely accurate |
| List of nomenclatural synonyms | Arachnoidiscus ehrenbergii var. oamaruensis Schmidt in Schmidt et al. 1890
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Arachnoidiscus ornatus var. dispar Brown 1933, p. 41, 51; pl. 4, fig. 1-4
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| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
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Arachnoidiscus sendaicus Brown 1933, p. 45, 57; pl. 1, fig. 1, pl. 4, fig. 6-8
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| Status | Valid | |
| Published in | Brown, N.E. 1933 [ref. 000172]. Arachnoidiscus. An account of the genus, comprising its history, distribution, development and growth of the frustule, structure and its examination and purpose in life, and a key to and descriptions of all known species, illustrated. W. Watson & Sons, Ltd., London. 88 pp., 7 pls. |
| Type | | Click here to view INA card. Click here to check this name in the INA website. |
| Collector | | Assessment of record accuracy | likely accurate |