1,720,963 research outputs found
A review of the systematics of western North Pacific angel sharks, genus Squatina, with redescriptions of Squatina formosa, S. japonica, and S. nebulosa (Chondrichthyes: Squatiniformes, Squatinidae)
No full textWalsh, Jonathan H., Ebert, David A. (2007): A review of the systematics of western North Pacific angel sharks, genus Squatina, with redescriptions of Squatina formosa, S. japonica, and S. nebulosa (Chondrichthyes: Squatiniformes, Squatinidae). Zootaxa 1551: 31-47, DOI: 10.5281/zenodo.17813
Squatina caillieti sp. nov., a new species of angel shark (Chondrichthyes: Squatiniformes: Squatinidae) from the Philippine Islands
No full textWalsh, Jonathan H., Ebert, David A., Compagno, Leonard J. V. (2011): Squatina caillieti sp. nov., a new species of angel shark (Chondrichthyes: Squatiniformes: Squatinidae) from the Philippine Islands. Zootaxa 2759: 49-59, DOI: 10.5281/zenodo.20274
Squatinidae Bonaparte 1838
No full textFamily Squatinidae Bonaparte, 1838 Subfamily Squatinini, Bonaparte, 1838: 130. Nuov. Ann. Sci. Nat. Bologna, ser. 1, 2: 206 (Family Squatinidae). Type genus: Squatina Dumeril, 1806.Published as part of Walsh, Jonathan H. & Ebert, David A., 2007, A review of the systematics of western North Pacific angel sharks, genus Squatina, with redescriptions of Squatina formosa, S. japonica, and S. nebulosa (Chondrichthyes: Squatiniformes, Squatinidae), pp. 31-47 in Zootaxa 1551 on page 35, DOI: 10.5281/zenodo.17813
FIGURE 2 in A review of the systematics of western North Pacific angel sharks, genus Squatina, with redescriptions of Squatina formosa, S. japonica, and S. nebulosa (Chondrichthyes: Squatiniformes, Squatinidae)
No full textFIGURE 2: A. S. formosa holotype (NTUM 01329), immature female, 328 mm, B. Close-up of caudal fin, C. Close-up of snout.Published as part of Walsh, Jonathan H. & Ebert, David A., 2007, A review of the systematics of western North Pacific angel sharks, genus Squatina, with redescriptions of Squatina formosa, S. japonica, and S. nebulosa (Chondrichthyes: Squatiniformes, Squatinidae), pp. 31-47 in Zootaxa 1551 on page 37, DOI: 10.5281/zenodo.17813
Squatina
No full textKey to Western North Pacific Squatina Species 1. Pelvic fin tips do not extend to origin of first dorsal fin.............................................................................. 2. — Pelvic fin tips extend to or surpass origin of first dorsal fin........................................................................ 3. 2. A prominent row of thorn-like denticles extending from mid-back to caudal peduncle; no distinct ocelli on posterior lobes of the pectoral fins ................................................................................................ S. japonica — No row of thorn-like denticles extending from the mid-back to the caudal peduncle, distinct paired ocelli on the posterior lobes of the pectoral fins ......................................................................... S. tergocellatoides 3. Upper lip arch semi-circular in shape (> 1.5 % TL in height); dorsals are lobed with a curvilinear anterior margin; pelvic girdle distance 1.4 times or less head length; caudal fin is lobed, especially dorsally, with a curvilinear postventral caudal margin ........................................................................................... S. formosa — Upper lip arch is not semi-circular in shape (<1.5 % TL in height); dorsals are not lobed (angular) without a curvilinear anterior margin (straight); pelvic girdle distance greater than 1.4 times head length; caudal fin is not lobed (angular), especially dorsally, without a curvilinear postventral caudal margin (straight)... ..................................................................................................................................................... S. nebulosaPublished as part of Walsh, Jonathan H. & Ebert, David A., 2007, A review of the systematics of western North Pacific angel sharks, genus Squatina, with redescriptions of Squatina formosa, S. japonica, and S. nebulosa (Chondrichthyes: Squatiniformes, Squatinidae), pp. 31-47 in Zootaxa 1551 on page 46, DOI: 10.5281/zenodo.17813
Squatina tergocellatoides Chen 1963
No full textSquatina tergocellatoides (Chen, 1963) Squatina tergocellatoides, Chen 1963: 99, Fig 28, valid, holotype (unique): THUP 0 0 348 (Eschmeyer, 2005). Figure 6. Common name. Ocellated angel shark Etymology. Named in reference to the patterns of ocelli on the pectoral fins. Distribution. Endemic to the WNP including the south China Sea, and waters surrounding northern Taiwan (Compagno et al., 2005 a), and northwestern Malaysia (Yano et al., 2005). Remarks. Additional pictures from Yano et al. (2005) confirm that the coloration and dorsal origin posterior of the pelvic fin tips are diagnostic for this species. There are two other features that are potential characters for S. tergocellatoides present in photographs but require further confirmation. Examination of photographs of fresh S. tergocellatoides specimens suggests that the caudal fin has a unique triangular shape to WNP squatinids in the ventral lobe of the caudal fin. Additionally, Compagno (in press) suggested that the nasal barbels are particularly ornate in S. tergocellatoides, which also is evident in photographs from Yano et al. (2005). Due to a lack of specimens, these characters could not be confirmed in this study. Attempts to examine or obtain photographs the S. tergocellatoides holotype for examination were unsuccessful; the holotype (THUP 00348) is believed to be lost.Published as part of Walsh, Jonathan H. & Ebert, David A., 2007, A review of the systematics of western North Pacific angel sharks, genus Squatina, with redescriptions of Squatina formosa, S. japonica, and S. nebulosa (Chondrichthyes: Squatiniformes, Squatinidae), pp. 31-47 in Zootaxa 1551 on page 45, DOI: 10.5281/zenodo.17813
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Squatina
No full textKey to Western North Pacific Squatina Species (revised from Walsh & Ebert, 2007) 1 a. Pelvic fin tips do not extend to origin of first dorsal fin........................................................ 2 1 b. Pelvic fin tips extend to or surpass origin of first dorsal fin..................................................... 3 2 a. A prominent row of thorn-like denticles extending from mid-back to caudal peduncle; no distinct ocelli on posterior lobes of the pectoral fins............................................................................... S. japonica 2 b. No row of thorn-like denticles extending from the mid-back to the caudal peduncle, distinct paired ocelli on the posterior lobes of the pectoral fins....................................................................... S. tergocellatoides 3 a. Dorsal-caudal space greater than inter-dorsal space; interorbital space greater than interspiracle space, pelvic inner margin greater than 9 % total length, pelvic base length greater than 13 % total length...................................... 4 3 b. Dorsal-caudal space less than interdorsal space; interorbital space less than interspiracle space, pelvic inner margin less than 9 % total length, pelvic base length less than 13 %.............................................. S. caillieti sp. nov. 4 a. Upper lip arch semi-circular in shape (> 1.5 % TL in height); dorsals are lobed with a curvilinear anterior margin; pelvic girdle distance 1.4 times or less head length; caudal fin is lobed, especially dorsally, with a curvilinear postventral caudal margin............................................................................................... S. formosa 4 b. Upper lip arch is not semi-circular in shape (<1.5 % TL in height); dorsals are not lobed (angular) without a curvilinear anterior margin (straight); pelvic girdle distance greater than 1.4 times head length; caudal fin is not lobed (angular), especially dorsally, without a curvilinear postventral caudal margin (straight)......................................... S. nebulosaPublished as part of Walsh, Jonathan H., Ebert, David A. & Compagno, Leonard J. V., 2011, Squatina caillieti sp. nov., a new species of angel shark (Chondrichthyes: Squatiniformes: Squatinidae) from the Philippine Islands, pp. 49-59 in Zootaxa 2759 on page 58, DOI: 10.5281/zenodo.20274
- …
