Lepas anatifera Linnaeus, 1758

Trivedi, Jigneshkumar N., Doshi, Mahima, Patel, Krupal J. & Chan, Benny K. K., 2021, Diversity of intertidal, epibiotic, and fouling barnacles (Cirripedia, Thoracica) from Gujarat, northwest India, ZooKeys 1026, pp. 143-178 : 143

Lepas anatifera Linnaeus, 1758 Figures 2J , 13

Examined material.

Five specimens (CL: 8.29-16.39 mm), LFSc.ZRC-162, Jakhau, Kachchh (23°11.30'N, 68°37.35'E), 26 July 2019, Gujarat, India, fishing boat surface, leg. M. Doshi.

Diagnosis

(modified from Chan et al. 2009). Capitulum with five smooth, white, thin plates. Capitulum white, peduncle dark brown in colour (Fig. 2J ). Scutum triangular with occludent margin convex. Right scutum with inner umbonal tooth, sometimes rudimentary. Scutum sometimes with dark marking or spots, carina branched below umbo. Tergum triangular to quadrangular with occludent margin convex or angular, apex almost truncated. Carina generally smooth, occasionally barbed. Peduncle variable in length, sometimes several times longer than capitulum. Caudal appendages short and claw-shaped. Maxilla globular with setae over margins (Fig. 13A ). Maxillule notched into four distinct regions (Fig. 13B ). Mandible having five teeth excluding inferior angle, inferior angle pectinated (Fig. 12C-E ). Mandibulatory palp triangular with setae on superior margin (Fig. 12F ). Labrum prominently concave, fine setae and teeth on cutting edge (Fig. 12G, H ).

Remarks.

The specimens examined in the present study agree with the description given by Chan et al. (2009). Lepas anatifera closely resembles L. anserifera Linnaeus, 1767, but can be differentiated by the following characters: maxillule notched into four distinct regions (maxillule not clearly notched in L. anserifera , Chan et al. 2009), upper portion of tergum blunt (upper portion of tergum pointed in L. anserifera , Chan et al. 2009), scutum sometimes with dark marking or spots (no such markings or spots on scutum in L. anserifera , Chan et al. 2009).

Worldwide distribution.

The species has a cosmopolitan distribution ( Chan et al. 2009; Schiffer and Herbig 2016) that includes India ( Krishnamoorthy 2007).

Distribution in India.

This species has been reported from Gujarat (present study), Tamil Nadu ( Krishnamoorthy 2007), Odisha (formerly Orissa) ( Annandale 1909; Ramakrishna and Talukdar 2003), and Andaman and Nicobar Islands ( Nilsson-Cantell 1938).

Figures

Figure 2. Gujarat barnacles A Striatobalanus tenuis (Hoek, 1883) on gastropod shell (Murex ternispina Lamarck, 1822) B top view of Striatobalanus tenuis (BD: 11.28 mm) LFSc. ZRC- 157 C external and internal view of scutum and tergum D Megabalanus tintinnabulum on shores LFSc. ZRC- 182 E external and internal view of scutum and tergum F Amphibalanus amphitrite (Darwin, 1854), top view, (BD: 12.38 mm) LFSc. ZRC- 181, external and internal views of scutum and tergum G Amphibalanus reticulatus (Utinomi, 1967), top view, (BD: 14.99 mm) LFSc. ZRC- 158, external and internal views of scutum and tergum H Chelonibia testudinaria (Linnaeus, 1758) on crab Portunus sanguinolentus I Chelonibia testudinaria (Linnaeus, 1758), top view (BD: 5.33 mm) LFSc. ZRC- 159, internal view of scutum and tergum J Lepas anatifera Linnaeus, 1758, (CL: 16.39 mm) LFSc. ZRC- 162, a. Side view of capitulum K Lepas anserifera Linnaeus, 1758, (CL: 16.28 mm) LFSc. ZRC- 183, Side view of capitulum.

Figure 12. Microeuraphia withersi (Pilsbry, 1916). (BD: 6.01 mm), LFSc. ZRC- 161, Light microscopy on mouth parts A maxilla B maxillule C mandible D close up on the inferior angle of mandible E close up on the teeth of mandible F mandibulatory palp G labrum H close up view on the cutting edge of labrum, showing the teeth. Scale bars in µm.

Figure 13. Lepas anatifera Linnaeus, 1758 (CL: 16.39 mm) LFSc. ZRC- 162, Light microscopy on mouth parts A maxilla B maxillule C mandible D close up on the inferior angle of mandible E close up on the teeth of mandible F mandibulatory palp G labrum H close up view on the cutting edge of labrum, showing the teeth. Scale bars in µm.