Newmanella spinosus Chan & Cheang, 2016

Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop & Khachonpisitsak, Salinee, 2017, The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand, Zoosystematics and Evolution 93 (1), pp. 13-34 : 16-18

Newmanella spinosus Chan & Cheang, 2016 Figure 5 ; Tables 2, 3

Newmanella spinosus Chan & Cheang, 2016: 212-220, figs 9-15.

Non-type material examined.

Andaman Sea: 4 specimens, Phang-nga province , Takua Thung district, Na Tai beach, 16.V.2015, A. Pochai (BUU16.TC.NS01-04) .

Description.

Peduncle absent; base calcareous. Shell greyish green, shell with 4 plates (1 carina, 2 latus, 1 rostrum); parietes low conical, 3-4 rows of irregular parietal tubes (parietes multiple tubiferous), radii board with horizontal striation and summit oblique. External surface with deep longitudinal/radiating lines from base to apex, internal surface of parietes smooth and white with greyish green striations close to operculum. Orifice pentagonal, diamond-shaped. External surface of operculum brownish grey, internal surface of operculum white. Scutum triangular, external surface of scutum with horizontal striations; tergum high and narrow, tergum with numerous depressor crests.

Distribution.

Newmanella spinosus was previously recorded from low intertidal to subtidal levels on rock shores along the coastlines of Taiwan and the Philippines and they were also collected from the surfaces of buoys used in fishing cages in the open sea ( Chan and Cheang 2016). In this present study, Newmanella spinosus specifically distributes along low shores, and the intertidal zones of Na Tai beach, Takua Thung District, Phang-nga (the Andaman Sea).

Remarks.

Newmanella spinosus is morphologically similar to Newmanella radiata , based on shell and scutum. The shell of Newmanella spinosus is green while those of Newmanella radiata is white. In addition, lateral scutal depressor muscle crest is shallow in the scutum of Newmanella radiata , but deep in Newmanella spinosus . The distribution of Newmanella spinosus is around the North Pacific Ocean, from Okinawan Japan to Taiwan and the Philippines ( Chan and Cheang 2016). The presence of Newmanella spinosus in Thailand is surprising in our study, and creates the first record of this species distributing specifically in Na Tai beach, Takua Thung district, Phang-nga province.

Figures

Figure 5. Newmanella spinosus collected from Na Tai beach, Phang-nga (BUU 16. TC. NS 01). A. Dorsal and ventral view of external shell, B. External (left panel) and internal (right panel) view of tergum (upper panel) and scutum (lower panel), C. External (upper panel) and internal (lower panel) view of shell plates. Abbreviations: c, carina; l, latus; r, rostrum.