Oswaldella blanconae El Beshbeeshy 1991

• Main Authors: Peña Cantero, A. L., Vervoort, W.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Kirchenpaueriidae; Oswaldella; Oswaldella blanconae; Antarc*; Antarctica
• Online Access: https://doi.org/10.5281/zenodo.4654020; http://treatment.plazi.org/id/038687FCFF84A7403A570212FE05752E

Oswaldella blanconae El Beshbeeshy, 1991 (figure 3) Oswaldella blanconae El Beshbeeshy, 1991: 263, 265; Peña Cantero et al ., 1997: 344; Peña Cantero and García Carrascosa, 1998: 179; 1999: 214; Peña Cantero and Vervoort, 1998: 36; Peña Cantero and Marques, 1999: 85. Oswaldella antarctica : Blanco, 1984: 41, pl. 38 figures 86–88. Material examined . 32/1996 , one stem ca 8 mm high (USNM 1003307). Description . Stem monosiphonic, unbranched (figure 3A), provided with apophyses alternately arranged in two longitudinal rows. Stem divided into internodes each with one apophysis, internodes arranged in zigzag fashion; stem internodes with bifurcation at origin of cauline apophysis. Angle between long axis of cauline internode and apophyses wider than 45 ° angle between cauline apophyses and succeeding cauline internode ca 90 ° (figure 3A). Cauline apophyses provided with two nematophores: one emerging through a hole in perisarc of axil (figure 3B) and another nematophore emerging through a ‘mamelon’ situated laterally on dorsal side of apophysis (figure 3C). Distinct node present between cauline apophyses and hydrocladia (figure 3C). Hydrocladia undivided or bifurcated (figure 3A); up to secondary hydrocladia present; arrangement always symmetrical. Hydrocladia homomerous; all internodes hydrothecate; distal internodes apically truncated. Hydrocladial internodes provided with one hydrotheca and two nematophores (figure 3B, D–G): one mesial superior emerging through a perisarc hole situated behind free portion of adcauline hydrothecal wall and one mesial inferior, deprived of nematotheca, emerging through a perisarc hole situated on a strongly marked elevation of internode (angle between long axis of hydrocladial internode and steep slope of infrathecal elevation almost 90 ° ). Hydrothecae placed on basal half or basal third of hydrocladial internodes (figure 3), shallow; aperture circular and either perpendicular to longitudinal axis of internode or slightly tilted downwards; rim even. Adcauline wall of hydrotheca ...