Aulacoseira veraluciae Tremarin, Torgan & T. Ludwig, 2014

Tremarin, Priscila Izabel, Ludwig, Thelma Alvim Veiga & Torgan, Lezilda Carvalho, 2014, Aulacoseira veraluciae sp. nov. (Coscinodiscophyceae, Aulacoseiraceae): a common freshwater diatom from Brazil, Phytotaxa 184 (4), pp. 208-222 : 215-218

publication ID

https://doi.org/ 10.11646/phytotaxa.184.4.2

DOI

https://doi.org/10.5281/zenodo.5151654

persistent identifier

https://treatment.plazi.org/id/03E6F85C-FFA2-FFB0-FF48-25F5ABEBFCAC

treatment provided by

Felipe

scientific name

Aulacoseira veraluciae Tremarin, Torgan & T. Ludwig
status

sp. nov.

Aulacoseira veraluciae Tremarin, Torgan & T. Ludwig , sp. nov. ( Figs 2‒35 View FIGURES 2–22 View FIGURES 23–29 View FIGURES 30–35 )

Holotype:— UPCB 76037 About UPCB , Diatom Collection of the Herbarium of Universidade Federal do Paraná, Brazil, illustrated here in Fig. 21 View FIGURES 2–22 .

Isotype:— BM 101711 ( The Natural History Museum , England) .

Type locality:— BRAZIL. State of Rio Grande do Sul, Tapes and Mostardas municipalities, Patos lake , 30º23’S / 50º41’W to 32º07’S / 52º12’W, phytoplankton, collected from 07 January 1988 by L.C. Torgan GoogleMaps .

Etymology:—The new species is named in honor of Dr. Vera Lúcia de Moraes Huszar of National Museum, Rio de Janeiro Federal University, for her dedication to phytoplankton research.

Description: — Cells solitary or joined by short spines to form short or long chains, straight or slightly curved. Valve diameter 3–15 µm, mantle height 4–12 µm. Mantle height/diameter ratio 0.35–2.01. Separation valves with face flat, totally or partially covered by areolae and mantle with deep longitudinal depressions formed by the spine insertion of the adjacent cell. Separation spines attenuate and long (ca. 3‒8 µm in length), one to five per valve, intercalate by other smaller and conical spines, one spine for every two interstriae. Linking valves with a flat face, perforated by marginal areolae that extend into the mantle through the marginal spines. Linking spines short, broadly spathulate with smooth edge, one spine for every two interstriae. Valve mantle usually ornamented by small knobs. Collum narrow, height 0.8‒1.1 µm. Pervalvar rows of areolae straight, 10‒16 in 10 µm. Areolae triangular close to marginal spines become rounded in the middle region of the mantle and elongate near the collum, 10‒15 in 10 µm, occluded by cribra. Ringleiste deep and thick, width1.6‒2.3 µm, protruding into the cell with reinforced rim. One to three rimoportulae above the inner side of the ringleiste. Other rimoportulae near the valve face/mantle junction in the separation and linking valves. External opening of rimoportulae associated with an areola, and not visible in LM. Internal opening of rimoportulae elongate and without stalk. Girdle bands with prominent ligula and finely perforated by round porous, ca. 10‒13 in 1 µm. Valvocopulae fimbriate. Auxospore with 12‒15 µm diameter.

BM

Bristol Museum

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