Sertularella allmani Hartlaub 1901
Sertularella allmani Hartlaub, 1901 Figs 1A, B, 2; Table 1 Sertularella Allmani Hartlaub, 1901: 81, pl. 5 figs 12, 13; pl. 6 figs 1, 8 (replacement name for Sertularia secunda Allman, 1888). – (?) Jäderholm, 1903: 283. non Sertularella Allmani. – Jäderholm, 1905: 32, pl. 12 fig. 11 (= Sertularella s...
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2017
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| Summary: | Sertularella allmani Hartlaub, 1901 Figs 1A, B, 2; Table 1 Sertularella Allmani Hartlaub, 1901: 81, pl. 5 figs 12, 13; pl. 6 figs 1, 8 (replacement name for Sertularia secunda Allman, 1888). – (?) Jäderholm, 1903: 283. non Sertularella Allmani. – Jäderholm, 1905: 32, pl. 12 fig. 11 (= Sertularella subantarctica Galea, sp. nov.). Sertularella allmani. – Hartlaub, 1905: 649, fig. O4. – Bedot, 1916: 199; 1918: 234. – Billard, 1924: 61. – El Beshbeeshy, 2011: 121, fig. 37F. non Sertularella allmani. – Naumov & Stepanjants, 1962: 86 [= Sertularella gaudichaudi (Lamouroux, 1824)]. Sertularia secunda Allman, 1888: pl. 25 figs 2, 2a, 2b (replacement name for Sertularia unilateralis Allman, 1888: 53). – Vervoort, 1972: 108, fig. 33 (reexamination of holotype). non Sertularella secunda Kirchenpauer, 1884: 50, pl. 15 figs 7, 7a [= Symplectoscyphus secundus (Kirchenpauer, 1884)]. Sertularia unilateralis Allman, 1888: 53 {non Sertularia unilateralis Lamouroux, 1824: 615, pl. 90 figs 1-3 [= Symplectoscyphus unilateralis (Lamouroux, 1824)]; non Sertularia unilateralis Allman, 1885: 139, pl. 13 figs 5-7 [= Amphisbetia bispinosa (Gray, 1843)]}. (?) Sertularella paessleri Hartlaub, 1901: 80, pl. 6 figs 3, 19. – Hartlaub, 1905: 654, fig. S4. Sertularella mediterranea asymmetrica Millard, 1958: 191, fig. 7B. – Millard, 1964: 45. – Millard, 1975: 295, fig. 96A [non Sertularella mediterranea Hartlaub, 1901]. Sertularella antarctica. – Blanco, 1963: 170, figs 5, 6. – Stepanjants, 1979: 84, pl. 15 fig. 3. – Blanco, 1994: 198. – Galea et al ., 2009: 7, figs 2J-N, 3A-B [non Sertularella antarctica Hartlaub, 1901]. Material examined: ZMH C04177; Chile, Región de Magallanes y de la Antártica Chilena, Isla Navarino, west of Puerto Pantalón del Weste, ca . 12 m, coll. Michaelsen no. 180; 31.12.1892; several fertile fragments (only part of the whole sample examined herein), up to 3.8 cm high, largest with accessory tubes on stem. There is obviously a crossing-out in the ZMH catalogue for this material: although it bears the official no. 180, it was indicated as no. 189 by Hartlaub (1901), as both share the same collection data. However, no. 189 corresponds to another specimen, ZMH C04178, assignable to S. picta (Meyen, 1834). As indicated by Hartlaub, the material is well-preserved and fertile. Since the 2nd specimen (from Port Stanley, Falkland Is., coll. Paessler, 12.04.1893) on which S. allmani was equally based upon was destroyed during WWII (H. Roggenbuck, pers. comm.), the specimen ZMH C04177 is designated here as the lectotype of S. allmani . – NHML 1888.11.13.101; French Southern and Antarctic Lands, Kerguelen Is., ca . 36 m, coll. Challenger holotype of Sertularia secunda Allman, 1888 ( = Sertularia unilateralis Allman, 1888 ), three male colony fragments (3.0, 1.5 and 1 cm high) in ethanol, as well as two slides; one slide (Fig. 1B), labeled “type” contains a 1.1 cm high, fertile colony fragment, and bears the mention “Challenger Stat 149D, Kerguelen, Depth 20 faths, Sertularia secunda (unilateralis) ”; the second slide (Fig. 1A) is a 1.7 cm high, fertile, branched colony fragment and bears the label “Challenger Coll., Sertularella secunda (Allman), Kerguelen (d. 20 fms), B. carm.”. – MHNG- INVE-62835; Chile, Región de los Lagos, south of Isla Yencouma (south Chiloé), -42.40958° -74.08353°, 8 m, coll. HSFS, HF6, lot A521; 24.02.2008; several stems up to 1.6 cm high bearing male gonothecae. – HRG- 0637; Chile, Región de Magallanes y de la Antártica Chilena, Islotes Gemelos, -54.91942° -67.36308°, 13 m, coll. HSFS, HF9, lot C132; 15.12.2010; several stems up to 5 cm high, richly bearing either male or female gonothecae, the latter with acrocysts. – HRG- 0314; Chile, Región de los Ríos, Corral, La Amistad (San Carlos), -39.85744° -73.44024°, 5-10 m, coll. D. Schories, pooled lots 0 2 and 06; 26.05.2011; colony on seaweed, composed of many stems up to 4.3 cm high, bearing male gonothecae. – HRG-0634; Chile, Región de los Ríos, north of Corral, Chaihuin, -39.95730° -73.60245°, 6-12 m, coll. D. Schories; 27.10.2011; profuse colonies with up to 5 cm high stems, bearing either male or female gonothecae, the latter with acrocysts. – HRG-0644; Chile, Región de los Ríos, north of Corral, Chaihuin, -39.95730° -73.60245°, 6-12 m, coll. D. Schories; 27.10.2011; male colony on seaweed, composed of numerous stems up to 5 cm high. – HRG-0636; Chile, Región de los Ríos, Niebla, Bonifacio, -39.69002° -73.37940°, 10-15 m, coll. D. Schories; 09.10.2012; numerous colonies on seaweed, with up to 3.5 cm high stems, bearing either male or female gonothecae, the latter with acrocysts. Description: Creeping, branching, anastomosing stolons giving rise to erect, bushy, irregularly-pinnate colonies, up to 6 cm high. Stems either mono- or lightly fascicled basally; in the first case, with 2-5 twists above origin from stolon. Both stems and branches divided into regularly-short, almost collinear internodes by means of deep, slightly oblique constrictions of the perisarc; the latter typically dark-brown at nodes, and almost transparent elsewhere; each internode with slight bulges at each end, and distally bearing a hydrotheca, or a hydrotheca and a lateral apophysis arising immediately from below its base. Hydrothecae, apophyses and side branches shifted on to one side of the colony at an acute angle, giving it two obvious, frontal and dorsal sides, respectively. Branching profuse, with a general, characteristic pattern: a couple of two consecutive, alternate side branches is separated from the next couple of branches by 1-2 (occasionally 0) internodes devoid of apophyses; occasionally, only one branch of a “pair” occurs (Fig. 2C); there are up to 3rd order branches. Hydrothecae biseriate, alternate, flask-shaped, moderately-long, adnate for about 1/3rd of their length, distinctly swollen adaxially, narrowing below aperture; abaxial wall nearly straight, free adaxial wall sigmoid, convex for most of its length, becoming concave a short distance below the aperture; rim thickened, provided with four, unequal cusps (abaxial one conspicuously produced, adaxial one the shortest, and the laterals asymmetrical and of intermediate length, the “anterior” one comparatively shorter than its “posterior” counterpart); cusps separated by deep, rounded embayments; 3 internal, submarginal cusps (2 latero-adaxial, 1 abaxial), not always present; operculum composed of 4 triangular flaps forming a conical roof. Gonothecae borne on both stems and side branches, arising from below the hydrothecal bases; broadly ovoid, with 6-8 transverse ridges, not always distinct; distally a short neck provided with generally 4 (occasionally 2-5) blunt projections of perisarc surrounding a central, rounded aperture; acrocysts in female. Perisarc of colonies either thin or thick. Dimensions: See Table 1. Remarks: When Allman (1888) realized that his Sertularia unilateralis (main text, p. 53) was a homonym (of Sertularia unilateralis Lamouroux, 1824 and Sertularia unilateralis Allman, 1885), he introduced the replacement name Sertularia secunda (legend of pl. 25, figs 2, 2a, 2b). However, Hartlaub (1901) correctly placed Allman’s species in the genus Sertularella Gray, 1848 and noted that, there, it becomes a junior synonym of Sertularella secunda Kirchenpauer, 1884 (the latter is now assigned to the genus Symplectoscyphus Marktanner-Turneretscher, 1890). He therefore introduced a second replacement name, viz . S. allmani . Calder (2015, p. 239, note 39), influenced by the opinion originally expressed by Vervoort (1972) and subsequently followed by Galea et al . (2009), decided to reject as invalid the binomena Sertularia unilateralis Allman, 1888 (a species of Sertularella Gray, 1843), its replacement name Sertularia secunda Allman, 1888 and, in turn, its replacement name Sertularella allmani Hartlaub, 1901, in the belief that all were synonyms of the frequently reported Sertularella antarctica Hartlaub, 1901 and its senior objective synonym Sertularella unilateralis Allman, 1876 (Calder, pers. comm.). However, in light of the present study, S. allmani is considered as a valid species, distinct from S. antarctica (see also remarks under the latter). Consequently, Calder’s (2015) suggestion, according to which a “case could be made (ICZN Art. 59.3.) for retention of Sertularella secunda Allman, 1888 [ sic !] as the valid name of the species”, resurfaces, but it appears today to not carry enough weight according to the requirements of the Code. Indeed, Art. 59.3. stipulates that Sertularia secunda Allman, 1888, as a junior secondary homonym of Sertularella secunda Kirchenpauer, 1884, and replaced before 1961, be permanently invalid unless the substitute name, Sertularella allmani Hartlaub, 1901, is not in use and the relevant taxa are no longer considered congeneric ( Sertularia secunda Allman, 1888 belongs actually to Sertularella Gray, 1843, and Sertularella secunda Kirchenpauer, 1884 to Symplectoscyphus Marktanner- Turneretscher, 1890), in which case the junior homonym is not to be rejected on grounds of that replacement. In light of the synonymy given above, it appears that the binomen S. allmani was used more often than S. secunda . Consequently, Hartlaub’s (1901) S. allmani is retained as the valid name of the species. The typical shape of the colonies of S. allmani is illustrated by Galea et al . (2014, pl. 3D, as S. antarctica ), while several gonothecae are depicted by Galea et al . (2009, fig. 3B, as S. antarctica ). The branching pattern in this species is irregularly pinnate. In some parts of very profuse colonies, nearly all internodes give rise to alternate side branches, although in more sparingly branched ones, there is a tendency to form groups of two consecutive, alternate side branches separated by 1-2 stem internodes devoid of apophyses. Occasionally, though not rarely, more irregular side branches, separated by a varied number of internodes with no apophyses, may arise successively on the same side of the stem. In all specimens from Chile, the stems are monosiphonic in habit, and give rise to side branches of up to 3rd order. Polysiphonic stems were reported only in rare instances [Hartlaub 1901, as both S. allmani and S. paessleri (see below for the taxonomic status of the latter)]. The perisarc of the colonies (including the hydrothecae) may be either thin (as in the Chilean material) or thick (Hartlaub, 1901; Blanco, 1963, as S. antarctica ). The hydrothecal margin is always thickened, and the abaxial marginal cusp is generally distinctly produced, though its length may vary among various colonies, or even within the same stem. The gonothecae of both sexes are either distinctly transversely ringed ( e.g. HRG-0637, HRG-0644), or only wrinkled to nearly smooth ( e.g. HRG-0634, HRG-0636). Material of Sertularella paessleri Hartlaub, 1901 is no longer extant in collections of ZMH (H. Roggenbuck, pers. comm.). However, Hartlaub emphasized the large size and the smooth appearance of the gonothecae in the obviously young colony available. Otherwise, the characters of the trophosome alone (branching almost regularly pinnate, with consecutive, alternate “pairs” of side branches separated by 2 internodes devoid of apophyses; invariably short internodes; short, adaxiallyswollen hydrothecae shifted on to one side, and adnate for 1/3rd their length; abaxial cusp produced; rim thickened) agree well with the present concept of S. allmani , including the presence of fascicled stems, as those observed in the lectotype, ZMH C04177. The variety asymmetrica , created by Millard (1958) for a hydroid assigned to S. mediterranea Hartlaub, 1901, is likely conspecific with the present species. Although all her specimens were represented by small, unbranched stems, their microscopic structure displays all the distinctive characters of S. allmani , notably: short internodes, thick-walled hydrothecae conspicuously shifted on to one side of the stem, a produced abaxial cusp, the noteworthy asymmetry of the laterals, as well as the presence of 3 internal, submarginal cusps. Distribution: Chile – Región de los Ríos [around Corral (Galea & Schories, 2012a, as S. antarctica )]; Región de los Lagos [south of Isla Grande de Chiloé (Galea et al ., 2009, as S. antarctica )]; Región de Magallanes y de la Antártica Chilena [west of Puerto Pantalón del Weste, Isla Navarino (Hartlaub, 1901; 1905); Islote Gemellos (present study); Magellan Strait (? Jäderholm, 1903)]. Argentina – Provincia de Santa Cruz [Punta Peñas, San Julián (Blanco, 1963; 1994, both as S. antarctica )]. Falkland Is. – Port Stanley (Hartlaub, 1901; 1905); Port Williams (Hartlaub, 1901; 1905, both as S. paessleri ). French Southern and Antarctic Lands, Kerguelen Is. – off Accessible Bay [Allman 1888, as Sertularia secunda (= Sertularia unilateralis )]. South Africa – Millard (1958; 1964; 1975, all as S. mediterranea var. asymmetrica ). : Published as part of Horia R. Galea, Dirk Schories, Verena Häussermann & Günter Försterra, 2017, Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species, pp. 255-321 in Revue suisse de Zoologie 124 (2) on pages 256-260, DOI: 10.5281/zenodo.893519 : {"references": ["Hartlaub C. 1901. Revision der Sertularella - Arten. Abhandlungen aus dem Gebiete der Naturwissenschaften, Hamburg 16 (2) (1): 1 - 143.", "Allman G. J. 1888. Report on the Hydroida dredged by H. M. S. Challenger during the years 1873 - 76. Part II. - The Tubularinae, Corymorphinae, Campanularinae, Sertularinae and Thalamophora. Report on the Scientific Results of the Voyage of H. M. S. Challenger during the years 1873 - 76, Zoology 23 (70): 1 - 90.", "Jaderholm E. 1903. Aussereuropaische Hydroiden im schwedischen Reichsmuseum. Arkiv for Zoologi 1: 259 - 312.", "Jaderholm E. 1905. Hydroiden aus antarktischen und subantarktischen Meeren gesammelt von der schwedischen Sudpolar-Expedition. Wissenschaftliche Ergebnisse der Schwedischen Sudpolar-Expedition 1901 - 1903 5 (8): 1 - 41.", "Hartlaub C. 1905. Die Hydroiden der Magalhaensischen Region und chilenischen Kuste. In: Fauna chilensis. Zoologische Jahrbucher Suppl. 6 (3): 497 - 714.", "Bedot M. 1916. Materiaux pour servir a l'Histoire des Hydroides. 5 e periode (1881 - 1890). Revue suisse de Zoologie 24 (1): 1 - 394.", "Billard A. 1924. Note critique sur divers genres et especes d'hydroides avec la description de trois especes nouvelles. Revue suisse de Zoologie 31 (2): 53 - 74.", "El Beshbeeshy M. 2011. Thecate hydroids from the Patagonian shelf (Coelenterata, Hydrozoa, Thecata). Edited by G. Jarms. Verhandlungen des Naturwissenschaftlichen Vereins in Hamburg 46: 19 - 233.", "Naumov D. V., Stepanjants S. D. 1962. Gidroidy podotryada Thecaphora, sobrannye v antarkticheskikh i subantarkticheskikh vodakh sovetskoi antarkticheskoi ekspeditsiei na dizel' - elektrokhode \" Ob \". In: Resul'taty biologicheskikh issledovanii sovetskoi antarkticheskoi ekspeditsii (1955 - 1958 gg), 1. Issledovaniya Fauny Morei 1 (9): 69 - 104.", "Lamouroux J. V. F. 1824. Des Polypes a polypiers. In: de Freycinet L. (ed.). Voyage autour du monde, entrepris par ordre du Roi, sous le Ministere et conformement aux instructions de S. Exc. le Vicomte de Bouchage, Secretaire d'Etat au Departement de la Marine, execute sur les corvettes de S. M. l'Uranie et la Physicienne, pendant les annees 1817, 1818, 1819 et 1820. Zoologie (2 e partie). Pillet Aine, Paris, pp. 592 - 671.", "Vervoort W. 1972. Hydroids from the Theta, Vema and Yelcho cruises of the Lamont-Doherty geological observatory. Zoologische Verhandelingen, Leiden 120: 1 - 247.", "Kirchenpauer G. H. 1884. Nordische Gattungen und Arten von Sertulariden. Abhandlungen aus dem Gebiete der Naturwissenschaften, Hamburg 8 (3): 1 - 54.", "Allman G. J. 1885. Description of Australian, Cape, and other Hydroida, mostly new, from the collection of Miss H. Gatty. Journal of the Linnean Society of London, Zoology 19: 132 - 161.", "Gray J. E. 1843. Additional radiated animals and annelids (pp. 292 - 295). In: Dieffenbach E. (ed.). Travels in New Zealand, with contributions to the geography, geology, botany, and natural history of that country. Vol. II. John Murray, London, 396 pp.", "Millard N. A. H. 1958. Hydrozoa from the coasts of Natal and Portuguese East Africa. Part I. Calyptoblastea. Annals of the South African Museum 44 (5): 165 - 226.", "Millard N. A. H. 1964. The Hydrozoa of the south and west coasts of South Africa. Part II. The Lafoeidae, Syntheciidae and Sertulariidae. Annals of the South African Museum 48 (1): 1 - 56.", "Millard N. A. H. 1975. Monograph on the Hydroida of southern Africa. Annals of the South African Museum 68: 1 - 513.", "Blanco O. M. 1963. Sobre algunos Sertularidos de la Argentina. Notas del Museo de La Plata 20 (203): 163 - 180.", "Stepanjants S. D. 1979. Gidroidy vod antarktiki i subantarktiki. In: Rezul'taty biologicheskikh issledovanii sovetskikh antarkticheskikh ekspeditsii, 6. Issledovaniya Fauny Morei 22 (30): 1 - 99.", "Blanco O. M. 1994. Enumeracion sistematica y distribucion geografica preliminar de los Hydroida de la Republica Argentina. Suborden Athecata (Gymnoblastea, Anthomedusae), Thecata (Calyptoblastea, Leptomedusae) y Limnomedusae. Revista del Museo La Plata (Zoologia) 14 (161): 181 - 216.", "Galea H. R., Haussermann V., Forsterra G. 2009. New additions to the hydroids (Cnidaria: Hydrozoa) from the fjords region of southern Chile. Zootaxa 2019: 1 - 28.", "Meyen F. J. F. 1834. Uber das Leuchten des Meeres und Beschreibung einiger Polypen und anderer niederer Thiere. In: Beitrage zur Zoologie, gesammelt auf einer Reise um die Erde. Verhandlungen der Kaiserlichen Leopoldinisch- Carolinischen Akademie der Naturforscher 16 (Suppl.): 125 - 216.", "Gray J. E. 1848. List of the specimens of British animals in the collection of the British Museum. Part 1. Centroniae or radiated animals. Trustees of the British Museum, London, 173 pp.", "Marktanner-Turneretscher G. 1890. Die Hydroiden des k. k. naturhistorischen Hofmuseums. Annalen des k. k. Naturhistorischen Hofmuseums 5: 195 - 286.", "Calder D. R. 2015. George James Allman (1812 - 1898): pioneer in research on Cnidaria and freshwater Bryozoa. Zootaxa 4020 (2): 201 - 243.", "Allman G. J. 1876. Descriptions of some new species of Hydroida from Kerguelen's Island. Annals and Magazine of Natural History (4) 17 (98): 113 - 115.", "Galea H. R., Schories D., Forsterra G., Haussermann V. 2014. New species and new records of hydroids (Cnidaria: Hydrozoa) from Chile. Zootaxa 3852 (1): 1 - 50.", "Galea H. R., Schories D. 2012 a. Some hydrozoans (Cnidaria) from Central Chile and the Strait of Magellan. Zootaxa 3296: 19 - 67."]} |
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