Characella luna, Dias & Santos & Pinheiro, 2019

Dias, Alan, Santos, George Garcia & Pinheiro, Ulisses, 2019, A new species of Characella Sollas, 1886 (Tetractinellida; Demospongiae; Porifera) from deeper waters off the coast of Brazil, Zootaxa 4559 (1), pp. 196-200 : 196-200

publication ID	https://doi.org/10.5281/zenodo.2585200
DOI	https://doi.org/10.5281/zenodo.5940666
persistent identifier	https://treatment.plazi.org/id/3C356D49-FF8E-FFBD-B8DB-7EB9FEE13090
treatment provided by	Plazi (2019-02-22 05:31:17, last updated 2024-11-28 12:28:39)
scientific name	Characella luna
status	sp. nov.

Treatment

Characella luna View in CoL sp. nov. ( Fig. 1A–I View FIGURE 1 ; Table 1)

Holotype: UFPEPOR 2150, Bacia Potiguar (04° 44.8945' S, 36° 25.4571' W), Rio Grande do Norte State, Brazil, depth 108 m, trawl, Box 37, col. PetrobraS, (23.V.2011). GoogleMaps

Description of preserved specimen ( Fig. 1A View FIGURE 1 ). Flattened fragment of 1–3 cm thick and 12 cm length. Surface iS irregular and Strongly hiSpid. ConSiStency compreSSable to hard. OSculeS not viSible. Colour in life iS unknown and purple in ethanol. The Specimen waS collected in the Same drag aS Aiolochroia crassa (Hyatt, 1875) and Stored in the Same container. It iS poSSible that the A. crassa pigmentS diScoloured the Characella Specimen. Skeleton: ( Fig. 1B View FIGURE 1 ). EctoSome conSiSting of a denSe layer of microSclereS and Small orthotrianeS with no particular architecture, pierced by oxeaS and the cladome of dichotriaeneS. ChoanoSomal Skeleton with oxeaS and microSclereS forming a confuSed maSS lacking orientation. SpiculeS ( Fig. 1C–I View FIGURE 1 ). OxeaS ( Fig. 1C–D View FIGURE 1 ): (1) long, Smooth, Slender and Slightly curved (2433.1– 3200.5 –3866.3 / 36.6– 60.6 –93.3 µm), (2) Short, Smooth, thick and curved (161– 183.5 –209.3 / 6.4– 8.7 –9.6 µm); OrthotrianeS ( Fig. 1E View FIGURE 1 ): Straight and Smooth (rhabdome: 138– 196 –333 / 12.5– 20.5 –50 µm; cladome 225– 347 –750 µm); DichotriaeneS ( Fig. 1H View FIGURE 1 ): rare, Straight and Smooth (cladome 237.5– 323.1 –506.2 µm); AmphiaSterS ( Fig. 1I View FIGURE 1 ): highly microSpined with 6–9 actineS (width 10.9– 22.7 –31.5 µm); MicroxeaS ( Fig. 1F–G View FIGURE 1 ): (1) thin, long, entirely microSpined and Slightly curved (114.3– 197.5 –296.2 / 1.61– 4.1 –6.4 µm), (2) Straight, entirely microSpined and centrotylote (32.2– 40.5 –57.9 / 1.6– 2.3 –3.5 µm).

Distribution and ecology. Known only from the type locality: Off Bacia Potiguar, Rio Grande do Norte State, Brazil), at 108 m depth. No data regarding the habitat were recorded; the relatively deep diStribution (below 100 m) iS So far unuSual for memberS of the genuS.

Etymology. The Specific name honorS the Second author’S daughter Luna Maria Mariz Garcia.

Discussion. ThiS new SpecieS iS aSSigned to Characella baSed on the two categorieS of microxeaS and the predominance of amphiaSterS aS microSclereS. Currently, only three SpecieS of genuS are known for the Brazilian coaSt ( Table 1). The SpecieS moSt Similar to Characella luna sp. nov. iS C. capitolii, becauSe both have two categorieS of oxeaS and two categorieS of microxeaS, one of them centrotylote. However, C. capitolii differS by not having dichotriaeneS and

(8) Lévi (1993); (9) Lebwohl (1914); (10) Cárdenas & Rapp (2012); (11) Van Soest et al. (2014)

for having pleSiaSterS and metaSterS. Like C. capitolii, C. poecillastroides Van SoeSt et al. 2014 ShareS two categorieS of microxeaS, one of them centrotylote. NevertheleSS, C. poecillastroides differS by the abSent of dichotriaeneS and juSt one category of oxea. The following SpecieS differS from the new SpecieS by: PreSence of one category of oxea (C. abbreviata; C. agassizi; C. aspera ; C. connectens; C. flexibilis; C. laevis; C. poecillastroides; C. reticulata); AbSence of dichotriaeneS (C. abbreviata; C. agassizi; C. capitolii; C. connectens; C. ijimai; C. laevis; C. poecillastroides; C. reticulata; C. tripodaria); AbSence of orthotriaeneS (C. enae; C. flexibilis); AbSence of the Second category of microxea (C. agassizi; C. enae; C. laevis; C. reticulata); PreSence of metaSterS and abSence of amphiaSterS (C. capitolii; C. enae; C. flexibilis; C. ijimai; C. laevis; C. reticulata); PreSence of pleSiaSterS (C. abbreviata; C. capitolii). In addition, C. laevis, C. ijimai and C. reticulata differ from C. luna sp. nov. by having tyloStyleS; C. pachastrelloides differS by having anatriaeneS.

References

LebWohl, F. (1914) JapaniSche TetraXonida, I. Sigmatophora und II. AStrophora metaStroSa. Journal of the College of Sciences, Imperial University of Tokyo, 35 (2), 1 - 116, plS. I - IX.

Levi, C. (1993) Porifera DemoSpongiae: SpongiaireS bathyauX de Nouvelle-Caledonie, recolteS par le ' Jean Charcot'. Campagne BIOCAL, 1985. ReSultatS deS campagneS MUSORSTOM. Vol. 11. Memoires du Museum national d'Histoire naturelle, A (Zoologie), 158, 9 - 87.

CardenaS, P. & Rapp, H. T. (2012) A revieW of NorWegian StreptaSter-bearing AStrophorida (Porifera: DemoSpongiae: Tetractinellida), neW recordS and a neW SpecieS. Zootaxa, 3253, 1 - 52.

van SoeSt, R. W. M., MeeSterS, E. H. & Becking, L. E. (2014) Deep-Water SpongeS (Porifera) from Bonaire and Klein Curacao, Southern Caribbean. Zootaxa, 3878 (5), 401 - 443.

Figures

FIGURE 1. Characella luna sp. nov. (UFPEPOR 2150, holotype). A, Ethanol preServed Specimen; B, croSS Section of Skeleton; C, oXea I; D, oXea II; E, orthotriaene; F, microXea I; G, microXea II; G’, detailS of endS of G; G”, detailS of the middle of G; H, dichotriaene; I, amphiaSterS. Scale barS: A = 5 cm; B = 1000 µm; C = 250 µm; D = 45 µm; E = 60 µm; F = 50 µm; G = 5 µm; G’ and G” = 2 µm; H = 500 µm; I = 10 µm.