Ceratosoma tenue Bergh, 1874

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 : 16

Ceratosoma tenue Bergh, 1874

( Figure 3 I –J )

Material examined. Eight specimens. MB28-004535, ZSC, 14 May 2012, 22 m, 34mm; MB28-004606, 15 Aug. 2012, ZWH, 18m, 62mm; MHN-YT1066, ZWH, 11 Jan. 2014, 17m, 49mm; MHN-YT801, ZM, 13 Jun. 2013, 8m, 22mm; MB28-004738, ZRP, 19 Sep. 2013, 1m, 22mm; MB28-004837, POB, 0 9 May 2014, 18 m, 27mm; ZMBN119699, ZRP, 17 Jul. 2015, 0.5m, 18mm; MB28-004610, ZY, 19 Aug. 2012, 34m, 30mm.

Habitats. Subtropical tidal reefs and rocky reefs.

Occurences: Ponta do Ouro and Zavora.

Geographic distribution. Indo-west, central Pacific. Hawaii (Gosliner et al. 2008), Japan ( Baba 1949), Korea, Papua New Guinea, New Caledonia, Australia, Malaysia (Gosliner et al. 2008), Indonesia ( Debelius 1996), Tanzania, South Africa and Mozambique (Gosliner et al. 2008).

Remarks. The bathymetric distribution of this species ranged from 1 to 50m. We found two morphotypes: one found in shallow water was smaller and similar to specimens from Tanzania ( Rudman 1988) with a bright yellow background and lateral lobes of different sizes ( Fig. 3 I ); the second morphotype found in deeper water was much larger and predominantly reddish. In this morphotype the anterior lobes are slightly smaller than the posterior lobes ( Fig. 3 J ). Additional molecular and morphological studies are needed to test the co-specificity of both morphotypes.

Figures

FIGURE 3. A, Doris ananas (MUZSP109884). B, Doris sp. (MB28-004569). C, Hallaxa cryptica (ZMBN105074). D, Hallaxaelongata(MB28-004552). E, Ardeadoris angustolutea (MB28-004705).F, Ardeadoris symmetrica(MB28-004611).G, Ardeadorisundaurum (MB28-004937).H, Cadlinellaornatissima(MB28-004754).I–J, Ceratosoma tenue(MB28-004837 and MB28-004535, respectively).K, Ceratosoma trilobatum (ZMBN117034). L, Ceratosoma sp. (MB28-005074).