Catenula komodensis Witkowski, Risjani, Yunianta, M. Rybak & Luthfi, 2024

Luthfi, Oktiyas Muzaky, Arsad, Sulastri, Kryk, Adrian, Risjani, Yenny, Yunianta,, Rybak, Mateusz, Peszek, Łukasz, Wróbel, Rafał J., Pappas, Janice L., Bąk, Małgorzata & Witkowski, Andrzej, 2024, New genera and new species of Catenulaceae (Bacillariophyta) from Coral Reef habitat of two Indonesia islands — Bawean and Sulawesi — A morphological approach, PhytoKeys 248, pp. 263-291 : 263-291

publication ID

https://doi.org/ 10.3897/phytokeys.248.131839

DOI

https://doi.org/10.5281/zenodo.14026389

persistent identifier

https://treatment.plazi.org/id/8BC8B6D9-F6DA-5141-942D-0D1F749319EB

treatment provided by

PhytoKeys by Pensoft

scientific name

Catenula komodensis Witkowski, Risjani, Yunianta, M. Rybak & Luthfi
status

sp. nov.

Catenula komodensis Witkowski, Risjani, Yunianta, M. Rybak & Luthfi sp. nov.

Type materials.

Holotype: Slide number SZCZ 27552 at repository of University of Szczecin.

Isotype: Slide number SZCZ 28814 at repository of University of Szczecin (Fig. 8 N View Figure 8 ) .

Type locality.

Sand and coral boulders of coral reef at Gili Iyang harbour Bawean Island, East Java, Indonesia.

Etymology.

The species name is derived from the Komodo dragon that is endemic to 4 islands: Komodo, Rinca, Flores, and Gili Motang, East Nusa Tenggara, Indonesia.

Distribution.

The diatom species C. komodensis is distributed on Bawean and Sulawesi Islands, Indonesia.

Description.

Light microscopy (Fig. 8 A – K View Figure 8 ): The valves are lanceolate, dorsiventral to linear-lanceolate with straight to less convex margins. Apices are narrowly pointed. Thickened silica in the central area was observed clearly on some valves under LM. Valve length 8.3–15.6 µm, n = 13 and width 1.7–2.6 µm, n = 13.

Scanning electron microscopy (Fig. 8 L – U View Figure 8 ): Valve face flat, abruptly transitioning to mantle. Raphe filiform, positioned near ventral margin externally and internally (Fig. 8 L – N, T – U View Figure 8 ). External raphe slits arcuate; proximal endings simple, dorsally oriented, distantly spaced (1.1–1.9 μm). Distal raphe endings simple, terminating 0.8–2.8 μm from apices. Areolae absent on dorsal and ventral valve surfaces. Dorsal side exhibits shallow or indistinct parallel grooves. Internal raphe slits curved; apical endings deflected dorsally (Fig. 8 T – U View Figure 8 ). Internal distal raphe endings simple, without fissures, terminating 1.7–1.8 μm from apices. Helictoglossae indistinct (Fig. 8 S View Figure 8 ). Dorsal and ventral sides striated; areolae occluded by dome-like structures. Striae density slightly lower dorsally; secondary silica deposition observed on ventral valve side (Fig. 8 U View Figure 8 ). Striae density 34–35 in 10 μm ventrally, 35 in 10 μm dorsally (n = 13).