Newmanella spinosus Chan & Cheang, 2016

Pitriana, Pipit, Valente, Luis, von Rintelen, Thomas, Jones, Diana S., Prabowo, Romanus E. & von Rintelen, Kristina, 2020, An annotated checklist and integrative biodiversity discovery of barnacles (Crustacea, Cirripedia) from the Moluccas, East Indonesia, ZooKeys 945, pp. 17-83 : 17

Newmanella spinosus Chan & Cheang, 2016 Figure 20a-e , Table 1: species no. 66

Newmanella radiata : Chan et al. 2009: 199, fig. 170.

Newmanella sp. Tsang et al., 2015: 325, fig. 1A; 327 fig. 2.

Newmanella spinosus Chan & Cheang, 2016: 212, figs 9-15; Pochai et al. 2017: 20, fig. 5; Sukparangsi et al. 2019: 10, figs 5-8.

Material examined.

Ambon Island: 5 specimens, MZB Cru Cir 072, Rutong, 3°42'23.7"S, 128°16'08.9"E, coll. P. Pitriana, 14 Jan 2016.

Diagnosis.

Shell low conical to cylindro-conical; parietes discrete; base calcareous; radii broad; scutum with very deep depressor muscle crests; cirrus II and cirrus IV having numerous triangular spines; fourth and fifth teeth of mandible separated; cutting edge of maxillule below notch protruding; intromittent organ of penis lacking basi-dorsal point.

Description.

Shell low conical, four plates externally greyish in colour, parietes with deep longitudinal, radiating lines from base to apex, internally with multiple rows of irregular parietal tubes (Fig. 20a, b ); radii wide with horizontal striations, summits oblique (Fig. 20c ); scutum triangular, external surface with horizontal striations, adductor ridge conspicuous; tergum high, narrow, basal margin with well-developed depressor muscle crests projecting beyond border; orifice pentagonal (Fig. 20d, e ); basis calcareous, tubiferous, tubes in single layer; mandible with five teeth, the first tooth is the largest and separated from the rest, while the fifth tooth is the smallest and located at the middle of lower margin; labrum with V-shaped notch, two large teeth on the right side, five teeth on the left side of cutting margin; penis without basidorsal point, with few bundles of setae distally. Basal length 17.4-20.9 mm, basal width 15.9-20.5 mm, height 6.8-8.9 mm. Orifice length 5.3-7.3 mm, orifice width 5.0-6.7 mm (measurements for five specimens are presented in Suppl. material 1: Table S19).

Distribution.

Newmanella spinosus was previously recorded from Japan, Taiwan, Philippines, and Thailand ( Chan and Cheang 2016; Pochai et al. 2017). In the current study, this range is extended to Rutong (on stones and reef surface), Ambon Island (a map with the occurrence of Newmanella spinosus in the Moluccas is shown in Suppl. material 1: Fig. S2).

Remarks.

Newmanella spinosus is morphologically close to Newmanella radiata but it can be distinguished by the morphology of the scutum, tergum, cirrus II, mandible and maxillule. N. spinosus also has numerous spines on its cirri, especially on cirrus II, which is different from N. radiata ( Chan and Cheang 2016).

Figures

Figure 20. Newmanella spinosus Chan & Cheang, 2016 (MZB Cru Cir 072 - 1) a upper view b lower view c side view d external view of scutum and tergum e internal view of scutum and tergum. Scale bars: 7 mm (a-c); 2 mm (d, e).