Filellum adhaerens Nutting 1901

• Main Authors: Marques, Antonio C., Peña, Álvaro L., Miranda, Thaís P., Migotto, Alvaro E.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Lafoeidae; Filellum; Filellum adhaerens; Kodiak; Alaska
• Online Access: https://doi.org/10.5281/zenodo.6190982; http://treatment.plazi.org/id/0389B761B716AD3EFF2EC67819F936BA

Filellum adhaerens (Nutting, 1901) (Figures 1 A–E) Lafoea adhaerens Nutting, 1901: 178, pl. 21, figs. 3–4. Filellum adherens : Peña Cantero et al. 1998: 299 –230. Type series. Neotype— Lafoea adhaerens Nutting, 1901, former University of California no. 5245 (Nutting 1901 and specimen’s label) (USNM 43728). Type locality. From the neotype, Harriman Expedition 1899, Kodiak Harbor, Alaska, epibiotic on Abietinaria turgida (Clark, 1876). The data coincide with those of the original description. Material examined. Neotype USNM 43728. Description of neotype. Colony stolonal, growing on stem and branches of Abietinaria turgida (Clark, 1876), arising from a creeping filiform, though flattened, hydrorhiza, 0.07–0.08 mm wide; hydrorhizal tubes and hydrothecae covered by a thin sheath (possibly produced by the host), with anastomosed perisarc, forming a tight mesh with no free space left in some parts of the sertulariid substrate. Hydrothecae sessile, arising with no definite pattern from hydrorhiza, varying in form, from almost completely adnate to substratum (either parallel to or over the hydrorhizal stolon), to provided with a short free part (especially both where substrate ends and where hydrothecae ascend one another). Hydrothecae irregularly curved in diverse patterns, in varied degrees to horizontal plane, rarely emerging from substrate plane. Perisarc tube connecting hydrothecae and hydrorhiza thinner than hydrothecae themselves. Adnate portion of hydrothecae tubular or maximally slightly flattened, 0.32–0.53 mm (0.41 ±0.08, n=10) long, perisarc smooth; free part cylindrical, smooth, 0.00– 0.19 mm (0.08 ±0.06, n=10) long; perisarc moderately thin; hydrothecae not widening distally, margin even and smooth, with up to 4 renovations, rarely slightly flaring; hydrothecal aperture circular, 0.12–0.14 mm (0.13 ±0.01, n=10) wide, perpendicular to axis of free part of hydrotheca. Hydranths not seen. Gonothecae packed in coppinia up to 2 mm wide. Gonothecae closely set, contiguous, perimeters distinct in dorsal view, ...