Mastogloia stellae Pennesi & Poulin, 2013
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publication ID |
https://doi.org/ 10.11646/phytotaxa.126.1.1 |
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persistent identifier |
https://treatment.plazi.org/id/F9712264-4D36-FFC7-39B1-FB15D0B4FEB9 |
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treatment provided by |
Felipe |
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scientific name |
Mastogloia stellae Pennesi & Poulin |
| status |
sp. nov. |
Mastogloia stellae Pennesi & Poulin , sp. nov. ( Figs 45–52 View FIGURES 45–52 , SEM; Figs 57–60 View FIGURES 53–60 , LM)
Diagnosis:— Valvae ellipticae vel late ellipticae, 11.8–25.6 µm longae, 6.2–11.3 µm latae, rotundis apicibus. Extra raphe duobus ramis sinuosis constitutum, quod in parte media expansis, in parte autem distali leviter expansis poris terminat; absunt terminales rimae. Interne raphe rectum est, densationibus circumscriptum. Raphe in parte media leviter elevato nodulo, in parte autem distali helictoglossa terminat. Transapicales striae radiales et uniseriatae (20– 25 in 10 µm), irregularem quincuncem structuram formantes. In externa parte areolae rotundae sunt, fixae in summa valva, paucis rotundis foraminibus. Partecta leviter bilobata, apicaliter extensa, similia in mensura (0.9 µm lata). Omne partectum in parte externa extensum porum habet.
Description:— Valves elliptical to broadly elliptical with rounded apices, 11.8–25.6 µm long and 6.2–11.3 µm wide ( Figs 45 View FIGURES 45–52 , 57–60 View FIGURES 53–60 ). Externally, two sinuous raphe branches end in expanded pores at centre and poles; no terminal fissure present ( Figs 45, 47 View FIGURES 45–52 ). Internally, two straight raphe branches with raised central nodule and helictoglossae ( Figs 48–50 View FIGURES 45–52 ). Transapical striae (20–25 in 10 µm) radiate at centre to curved radiate at poles, forming a quincunx pattern ( Figs 45–47 View FIGURES 45–52 ). Striae composed externally of uniseriate rows of rounded areolae ( Fig. 45 View FIGURES 45–52 ) sunken in the valve surface leaving only smaller foramina ( Figs 45–47, 52 View FIGURES 45–52 ); no areolae on mantle ( Figs 51, 52 View FIGURES 45–52 ). Internally, areolae open through small rounded foramina ( Figs 48–50 View FIGURES 45–52 ) which form an irregular quincunx pattern ( Fig. 48 View FIGURES 45–52 ). Three to five slightly bilobed partecta apically oriented ( Figs 48 View FIGURES 45–52 , 57, 59 View FIGURES 53–60 ) on each side of valvocopula, equal in shape and size (0.7–1.0 µm in width) and distributed along the whole length of the partectal ring up to the apex ( Figs 48 View FIGURES 45–52 , arrowhead, 50, 57, 59); no septum hiding the helictoglossa ( Figs 48, 50 View FIGURES 45–52 ). Each partectum is ornamented with small pores in parallel rows and opens externally through a partectal pore opposite to the concave side of the partectal lobe ( Figs 51 View FIGURES 45–52 , arrowhead, 52).
Holotype:— Circled specimen on slide CANA 86492 ( Canadian Museum of Nature , Ottawa, Canada). The holotype specimen is illustrated in Figure 59 and 60 View FIGURES 53–60 . SEM images of the type material are Figs 51 and 52 View FIGURES 45–52 .
Isotype:— Circled specimen on SEM stub no. DISVAR-ANSH15SP31 (Department of Life Science and Environment, Polytechnical University of the Marche, Ancona, Italy).
Type locality:— EGYPT. Sharm el-Sheikh: in the Red Sea (27°51'16.71''N and 34°17'30.17''E). Epiphytic on Halophila stipulacea (Forsskål) Ascherson. Collected by Dr. Lucia Bongiorni, 1 February 2006 GoogleMaps .
Etymology:— The specific epithet refers to the second author’s granddaughter, Stella Martineau-Poulin.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.