Halgerda, Bergh, 1880

Tibiriçá, Yara, Pola, Marta & Cervera, Juan Lucas, 2017, Astonishing diversity revealed: an annotated and illustrated inventory of Nudipleura (Gastropoda: Heterobranchia) from Mozambique, Zootaxa 4359 (1), pp. 1-133 : 50

Halgerda sp. 2

( Figure 16 L )

Material examined. Eight specimens. MB28-004417, ZRP, 0 5 May 2011, 1 m, 15mm (preserved); MB28-004565, ZRP, 0 7 Jun. 2012, 2m, 9mm; MB28-0 0 4679, ZRP, 25 May 2013, 1 m, 20mm; MB28-004731, ZRP, 22 Aug. 2013, 2m, 27mm; MHN-YT903, ZRP, 0 7 Sep. 2013, 0.5m, 30mm; MB28-004807, ZRP, 17 Mar. 2014, 0.5m, 42mm; MB28-004901, NKA, 10 Jun. 2014, 18m, 27mm; ZMBN94225, PAE, 2 Feb. 2014, 20– 25m, 20mm.

Habitats. Subtropical tidal reefs, rocky reefs and topical coral reefs.

Occurrences. Ponta do Ouro , Zavora, Paindane, Nacala, Nuarro and Pemba.

Geographic distribution. Indian Ocean. British Indian Ocean Territory, Maldives ( Yonow et al. 2002), Kenya ( Rudman 1978), Madagascar (Eliot 1905), Tanzania (Gosliner et al. 2008) and Mozambique (Gosliner et al. 2008; King and Fraser 2014).

Remarks. This species has been thought to be an Indian Ocean variation of Halgerda tessellata ( Bergh, 1880) . However, it differs genetically and anatomically. The principle of the external difference is the absence of the submarginal band formed by white spots present in the Pacific specimens.

Figures

FIGURE 16. A, Carminodoris bifurcata (MB28-004766). B–C, Discodoris coerulescens (ZMBN105166), dorsal and ventral view. D, Halgerda cf. bacalusia (MB28-004874). E, Halgerda dalanghita (MB28-004815). F, Halgera toliara (MB28- 004783). G–I, Halgerda wasiniensis (MB28-004440, MB28-004779 and MB28-004918, respectively). J. Halgerda cf. wasinensis (MB28-005077). K, Halgerda sp. 1 (MB28-004721).L, Halgerda sp. 2 (MB28-004901).