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Oswaldella Stechow 1919
No full textOswaldella Stechow, 1919 Oswaldella Stechow, 1919: 853; type, by original designation: Schizotricha bifurca Hartlaub, 1904. Diagnosis (modified from Peña Cantero & Vervoort 2004). Feather-like, colonial hydroids with branched or unbranched stem, divided into internodes or undivided, mono- or polysiphonic, usually with two longitudinal rows of apophyses (three in O. laertesi Peña Cantero, 2007), alternately arranged in one plane and supporting hydrocladia. Cauline apophyses with varied number of nematophores on upper surface, emerging through raised, perforated part of periderm (‘mamelon’) and/or through simple axillary holes in perisarc, with or without reduced nematothecae. Stem without nematophores. Hydrocladia typically branched. Degree of branching varied. Hydrocladia homomerously divided into hydrothecate internodes (except for Oswaldella herwigi El Beshbeeshy, 2011), each with one hydrotheca and two mesial nematophores: first one placed behind free adcauline hydrothecal wall and emerging through simple hole in perisarc; second nematophore situated below hydrotheca at a more or less distinct elevation of internode and with or without rudimentary, scale-shaped nematotheca. Hydrothecae cupshaped to tubular. Colonies dioecious, with sexual dimorphism. Gonothecae inserting on hydrocladia below hydrotheca, next to mesial inferior nematophore. Cnidome composed of microbasic mastigophores, typically in two size classes.Published as part of Molinero, A. González & Peña Cantero, A. L., 2015, SEM study of species of Oswaldella Stechow, 1919 (Cnidaria, Hydrozoa, Kirchenpaueriidae), with an annotated checklist of the species of the genus, pp. 401-441 in Zootaxa 4052 (4) on page 402, DOI: 10.11646/zootaxa.4052.4.1, http://zenodo.org/record/24588
Protiaropsis Stechow 1919
No full textProtiaropsis Stechow, 1919 Protiaropsis Stechow, 1919: 150; Schuchert, 2010: 338. Heterotiara Maas, 1905: 19; Mayer, 1910: 107; Bigelow, 1919: 287; Kramp, 1961: 122; Bouillon et al., 2006: 180. Type species: Protiaropsis anonyma (Maas, 1905). Diagnosis. Medusae with 4 simple radial canals; no centripetal canals; gonads interradial, no transverse folds; no secondary tentacles; no ocelli. Remarks. This homonymic genus Heterotiara was proposed by Maas (1905), with the type species Heterotiara anonyma Maas, 1905 from the Malay Archipelago. Only two imperfect specimens were found by Maas (1905) during the Siboga Expedition. It was recorded in the eastern Pacific, northwest Pacific and western Atlantic by Bigelow (1909, 1913, 1918) and Vanhöffen (1911, based on one anonyma and four minor specimens, from the “Valdivia” collection). Then Stechow (1919) founded Protiaropsis to replace Heteratiara Maas, 1905, non Heterotiara Pomel, 1883 (Echinodermata (fossil)). However, the invalid name Heterotiara Maas, 1905 was still extensively used (Kramp, 1961; Bouillon et al., 2006; Xu et al., 2012). Until the 2010 s, Schuchert (2010) renewed the valid status of Protiaropsis Stechow, 1919. The present collection contains five specimens of the genus, one example of a new species, pedunculata sp. nov., from the East China Sea, and four examples of a new species, tetranema sp. nov., from South China Sea.Published as part of Zhenzu Xu, Jiaqi Huang, Mao Lin, Donghui Guo & Chunguang Wang, 2016, Taxonomic notes on Hydroidomedusae (Cnidaria) from South China Sea II: Family Bythotiaridae (Anthomedusae), pp. 149-157 in Zoological Systematics 41 (2) on page 153, DOI: 10.11865/zs.2016013, http://zenodo.org/record/27028
Eine Umgebungssemantik für fast 'almost'
No full textvon Stechow, A. (2010). Eine Umgebungssemantik für fast 'almost'. Handout, Eberhard Karls Universität Tübingen
Campanularia africana Stechow 1923
No full textCampanularia africana Stechow, 1923 Fig. 3G–H; Table 5 Campanularia africana Stechow, 1923: 104. Campanularia africana – Leloup 1938: 13–14, fig. 9. — Millard 1975: 204, fig. 67a. Material examined SOUTH ATLANTIC OCEAN • 2 colonies, growing on algae, without gonothecae; Vema Seamount, stn BT5; 31°37′16″–31°36′58″ S, 8°22′37″–8°23′06″ E; 71–94 m depth; 31 Jan. 2015; SEAFO-2015 leg.; SEAFO-2015-40437, SEAFO-2015-40768, LZM-UV slide R. 577. Distribution Campanularia africana has previously been reported from Australia (Watson 1990), Japan (Stechow 1923; Leloup 1938; Hirohito 1995) and Natal, South Africa (Millard 1975). Its bathymetric distribution extends from the littoral area to a depth of 102 m (Millard 1975; Stechow 1925). Our finding of C. africana at Vema Seamount represents the first record of this species for the Atlantic Ocean.Published as part of Gil, Marta & Ramil, Fran, 2021, Hydroids (Cnidaria, Hydrozoa) from the Vema and Valdivia seamounts (SE Atlantic), pp. 49-96 in European Journal of Taxonomy 758 on page 62, DOI: 10.5852/ejt.2021.758.1425, http://zenodo.org/record/508812
Obelia oxydentata Stechow 1914
No full textObelia oxydentata Stechow, 1914 Fig. 16g Obelia (?) oxydentata Stechow, 1914: 131, fig. 7. Obelia oxydentata.— Weiss, 1948: 158. Type locality. Virgin Islands: St. Thomas, Charlotte Amalie (Stechow 1914). Voucher material. Fort Pierce, ship canal at Link Port, 27°32’05”N, 80°20’50”W, 0.1 m, 17.ii.1991, on prop roots of Rhizophora mangle, 15° C, 22‰, collected by snorkeling, several colony fragments, up to 9 mm high, without gonophores, coll. D.R. Calder, ROMIZ B1112. Remarks. Specimens referred here to Obelia oxydentata Stechow, 1914 were all small (<1 cm high) with monosiphonic hydrocauli. Hydroids with the same characters have been reported elsewhere from shallow waters of the tropical and subtropical western Atlantic as O. bidentata Clark, 1875 (e.g., Bermuda: Calder 1991a; Brazil: Migotto 1996; Guadeloupe: Galea 2010). Such specimens contrast with the original descriptions of O. bidentata (colonies polysiphonic and up to 15 cm high) and its subjective synonym O. bicuspidata Clark 1875 (colonies polysiphonic and up to 8 cm high), both from temperate waters in the Long Island Sound area. While I earlier considered O. oxydentata to be conspecific with O. bidentata (e.g., Calder 1991a), it appears to be a different species. Obelia longicyatha Allman, 1877 from 90 fathoms (165 m) off Florida Reef, with small (<2.5 cm) but partly polysiphonic colonies, has also been regarded in many recent works as conspecific with O. bidentata. Comparisons are warranted to determine whether the supposedly shallow-water O. oxydentata is identical with it. Reported distribution. Atlantic coast of Florida. Biscayne Bay (Weiss 1948). Western Atlantic. Florida (this report) to Brazil (Vannucci Mendes 1946), and including the Caribbean Sea (Stechow 1914; Fraser, 1944). Its range will likely prove to be much more extensive once it can be reliably distinguished from Obelia bidentata Clark 1875. Elsewhere. Tropical eastern Pacific (Stechow 1914).Published as part of Calder, Dale R., 2013, Some shallow-water hydroids (Cnidaria: Hydrozoa) from the central east coast of Florida, USA, pp. 1-72 in Zootaxa 3648 (1) on page 59, DOI: 10.11646/zootaxa.3648.1.1, http://zenodo.org/record/526436
Zyzzyzus Stechow 1921
No full textGenus Zyzzyzus Stechow, 1921Published as part of Brinckmann-Voss, Anita & Calder, Dale R., 2013, Zyzzyzus rubusidaeus (Cnidaria, Hydrozoa, Tubulariidae), a new species of anthoathecate hydroid from the coast of British Columbia, Canada, pp. 389-397 in Zootaxa 3666 (3) on page 390, DOI: 10.11646/zootaxa.3666.3.9, http://zenodo.org/record/22190
Events, times, and worlds: An LF architecture.
No full textBeck, S. & A. von Stechow (submitted). Events, times, and worlds: An LF architecture
Orthopyxis frigida Stechow 1923
No full textOrthopyxis frigida Stechow, 1923 (*) Campanularia everta — Hickson & Gravely, 1907: 24 –25. Orthopyxis frigida Stechow, 1923a: 104; 1923b: 107. Remarks. Hickson & Gravely (1907) assigned to Orthopyxis everta (Clark, 1877) material from McMurdo Sound. However, the presence of this species in Antarctic waters is uncertain. Hickson & Gravely (1907: 25) themselves indicated “we have some hesitation in assigning these specimens to the species C. everta of Clark, as they differ in many respects from the original description of the type”. In fact, Vervoort (1972a) and Blanco (1976) excluded from this species the specimens described by Hickson & Gravely (1907: 24). Stechow (1923a) considered highly unlikely that Orthopyxis everta occurs in Antarctic waters and concluded that the material studied by Hickson & Gravely (1907) actually represented a new species, which he named Orthopyxis frigida.Published as part of ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1) on page 27, DOI: 10.11646/zootaxa.4293.1.1, http://zenodo.org/record/82847
Sertularia perpusilla Stechow 1919
No full text? Sertularia perpusilla Stechow, 1919 Remarks: Sertularia perpusilla Stechow, 1919 was recorded for southeastern Brazil by Vannucci (1951a, 1951b), but the species is considered endemic to the Mediterranean Sea (Peña Cantero & García Carrascosa 2002). Distribution in South America: polyp—Atlantic Ocean, Brazil, at 21.60°S 40.98°W (Vannucci 1951a, 1951b; Migotto et al. 2002). Habitat: polyp—at 22m depth (Vannucci 1951b).Published as part of M. P. Oliveira 1,16, S P. Miranda 2, *,, Es W. Mianzan 10,, Ro E. Migotto 11,, Ne B. Nascimento 2,11, Eli Nogueira Júnior 12,, Er Quiñones 13,, Izio Scarabino 14,, Tín Schiariti 10,, Io N. Stampar 15,, Tronolone 2, , Quíria B. & Onio C. Marques 2,11, 2016, Census of Cnidaria (Medusozoa) and Ctenophora from South American marine waters, pp. 1-256 in Zootaxa 4194 (1) on page 130, DOI: 10.11646/zootaxa.4194.1.
Sertularia tongensis Stechow 1919
No full textSertularia tongensis (Stechow, 1919) (fig. 5 H–M, table 2) Sertularella tongensis Stechow, 1919: 89, fig. F 1, G 1.― Vervoort & Vasseur, 1977: 52, fig. 23. not Sertularia tongensis Stechow, 1919: 101, fig. N 1 (= Sertularia ephemera nom. nov.). Sertularia thecocarpa Jarvis, 1922: 341, pl. 24 fig. 10, syn. nov. ― Millard & Bouillon, 1973: 71, fig. 9 C–D.― Morri et al., 2009: 54, figs 2 E–F, 4 A–D. Sertularella minuscula Billard, 1924: 648, fig. 2 F, syn. nov. ― Billard, 1925: 139, fig. 9.― Leloup, 1932: 161, figs 26, 27.― Leloup, 1935: 45.― Fraser, 1944: 266, pl. 57 fig. 254.― Pennycuik, 1959: 195, pl. 6 fig. 2.―Van Gemerden- Hoogeveen, 1965: 34, figs 8–12.―Hirohito, 1974: 18, fig. 7.― Cooke, 1975: 98.― Gibbons & Ryland, 1989: 417, fig. 33.― Watson, 2002: 343, fig. 3. Sertularella parvula Mammen, 1965: 37, fig. 69, syn. nov. (not Calamphora parvula Allman, 1888). Sertularia stechowi Hirohito, 1995: 215, figs 72 D–F, 73 A–C, pl. 12 fig. C, syn. nov. Sertularella cumberlandica ― Stechow, 1913: 140, fig. 115 [not Sertularella (= Symplectoscyphus) cumberlandica Jäderholm, 1905]. Symplectoscyphus cumberlandicus ― Yamada, 1959: 60 [not Symplectoscyphus cumberlandicus (Jäderholm, 1905)]. Material examined. Stn. 9: 21.11.2009, 21 m—several sterile stems to 7 mm high, on concretions and stem of Eudendrium sp. (MNHN-IK. 2009 - 818). Stn. 10: 19.11.2009, 17 m—several stems to 7 mm high, of which one bears a gonotheca and another two side branches, on sponge; 0 2.12.2009, 15– 20 m—several sterile stems, to 9 mm high, on sponge and Dictyota sp. (MHNG-INVE- 68724) Stn. 12: 30.11.2009, 12– 15 m—several sterile stems, to 6 mm high, on sponge and worm tube. contiuned. Remarks. This remarkable hydroid is characterized by: 1) its alternate hydrothecae (fig. 5 H), instead of (sub)opposite as in the majority of species assigned to Sertularia Linnaeus, 1758; 2) a hydrothecal aperture closed by two peculiar opercular flaps, both pleated along a median line, giving the impression of a fourflapped operculum when the hydrotheca is seen apically (fig. 5 K); 3) its gonothecae (fig. 5 L) and, when present, side branches (fig. 5 I) arising from within the stem hydrothecae. In spite of its peculiar morphology, four additional nominal species from the Indo-Pacific have been erected for the present hydroid, viz. Sertularia thecocarpa Jarvis, 1922, Sertularella minuscula Billard, 1924, Sertularella parvula Mammen, 1965, and Sertularia stechowi Hirohito, 1995. All the available descriptions and illustrations referring to them leave no doubt about their conspecificity with Stechow’s (1919) species. Comparison of measurements from various sources (table 2) show that all fall into a common range of variation. The length of both abcauline and free adcauline sides of the hydrotheca appears highly variable and is in relation to whether the renovations (sometimes numerous, though often inconspicuous) have been included when measuring the size of the thecae. The differences in the size of the gonotheca may be due to different stages of maturation and/or to possible sexual dimorphism, though their shape is substantially the same in all the available accounts. Two types of nematocysts occur in the present material (undischarged capsules): microbasic mastigophores (6.1–6.4 × 1.8 –2.0 µm), and larger, unidentified capsules (10.8–11.4 × 3.1–3.3 µm). Since Sertularella tongenis Stechow, 1919 clearly belongs to Sertularia Linnaeus, 1758 (see SEM images in Morri et al. 2009), it appears that this species and Sertularia tongensis Stechow, 1919 become secondary homonyms. As Sertularella tongensis was described on p. 89, and Sertularia tongensis on p. 101 of the same publication (Stechow 1919), I consider the former specific name as the senior homonym (ICZN Art. 24.2, Principle of the First Reviser), and I propose the new name Sertularia ephemera nom. nov. for the latter (ICZN Art. 60). Better knowledge of the taxonomical status of Sertularia ephemera is actually needed, especially with respect to its relationship with S. maldivensis (Borradaile, 1905). Caribbean records. Bonaire (Leloup 1935, Van Gemerden-Hogeveen 1965), Farallón Centinela (Venezuela) (Van Gemerden-Hoogeveen 1965). World distribution. Kingdom of Tonga (Stechow 1919), Chagos Archipelago (Jarvis 1922), Indonesia (Billard 1924, 1925), Gulf of Manaar (Leloup 1932), Queensland (Australia) (Pennycuik 1959, Watson 2002), southern India (Mammen 1965), Seychelles (Millard & Bouillon 1973), Bonin Islands (Hirohito 1974), Marshall Islands (Cooke 1975), Moorea (Vervoort & Vasseur 1977), Fiji (Gibbons & Ryland 1989), Japan (Stechow 1913, Yamada 1959, Hirohito 1995), Levant Sea (Morri et al. 2009).Published as part of Galea, Horia R., 2010, Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles, pp. 1-40 in Zootaxa 2570 on pages 18-20, DOI: 10.5281/zenodo.19738
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