Calcinus morgani Rahayu & Forest 1999

Celia, Maria, Malay, D., Miller, Allison K. & Komai, Tomoyuki, 2021, Hermit crabs (Crustacea: Decapoda: Anomura: Paguroidea) of the Northern Marianas, including new records and an updated checklist, Micronesica 2021 (1), pp. 1-29 : 7

Calcinus morgani Rahayu & Forest 1999

Fig. 2f

Material. 1 specimen ( UF 5720 ), Rota Island , station ROT-05 ; 3 specimens ( UF 5785 ), Rota Island , station ROT-05 ; 1 specimen ( UF 5784 ), Aguijan Island , station AGU-02 ; 1 specimen ( UF 6360 ), Saipan Island , station NM-04 ; 1 specimen ( UF 5719 ), Saipan Island , station NM-04 ; 1 specimen ( UF 5794 ), Saipan Island , station NM-05 ; 6 specimens ( UF 5703 ), Saipan Island , station NM-04 ; 1 specimen ( UF 5787 ), Anatahan Island , station ANA-003 ; 1 specimen (SIO-BIC C14259), Sarigan Island , station AKM-SAR-02 ; 3 specimens ( UF 5791 ), Guguan Island , station GUG-001 ; 1 specimen ( UF 5715 ), Guguan Island , station GUG-002 ; 1 specimen ( UF 5717 ), Alamagan Island , station ALA-002 ; 3 specimens ( UF 5790 ), Alamagan Island , station ALA-002 ; 1 specimen ( UF 5721 ), Alamagan Island , station ALA-003 ; 2 specimens (SIO-BIC C14240), Alamagan Island , station AKM-ALA-01 ; 1 specimen ( UF 5792 ), Pagan Island , station PAG-03 ; 1 specimen (SIO-BIC C14215), Pagan Island , station AKM-PAG-01 ; 1 specimen (SIO-BIC C14218), Pagan Island , station AKM-PAG-02 ; 3 specimens (SIO-BIC C14222), Pagan Island , station AKM-PAG-03 ; 1 specimen (SIO-BIC C14234), Pagan Island , station AKM-PAG-PA1 ; 1 specimen (SIO-BIC C14236), Pagan Island , station AKM-PAG-PA4 ; 1 specimen ( UF 5788 ), Agrihan Island , station AGR-01 ; 1 specimen (SIO-BIC C14208), Agrihan Island , station AKM-AGR-00A3 ; 5 specimens ( UF 5793 ), Maug Islands , station MAUG-03 ; 1 specimen ( UF 7439 ), Maug Islands , station MAUG-04 ; 1 specimen ( UF 5795 ), Maug Islands , station MAUG-04 ; 2 specimens ( UF 5789 ), Maug Islands , station MAUG-10 ; 2 specimens ( UF 5786 ), Supply Reef , station SUP-01 ; 1 specimen (SIO-BIC C14195), Maug Islands , no station info ; 1 specimen (SIO-BIC C14196), Maug Islands , no station info .

Remarks. Komai (2004) demonstrated that Calcinus areolatus Rahayu & Forest 1999 was confounded with juvenile or young specimens of C. morgani . Additionally, C. morgani was formerly confused with the very similar C. gaimardii . The latter has not been found in the Marianas. Calcinus morgani is found in wave-exposed intertidal rocky shored and coral reefs, while C. gaimardii prefers calm, subtidal lagoonal waters (Asakura 2002). See Rahayu & Forest (1999) and Asakura (2002) for how to distinguish between the two species.

Figures

Fig 2. A: Aniculus aniculus (Olivier, 1812), Pagan Island (SIO-BIC C14220). B: Calcinus elegans (H. Milne Edwards, 1836), Alamagan Island (SIO-BIC C14219). C: Calcinus hazletti Haig and McLaughlin, 1984, photo not associated with specimen. D: Calcinus laevimanus (Randall, 1840), Saipan Island (SIO-BIC C14214). E: Calcinus latens (Randall, 1840), Pagan Island (SIO-BIC C14216). F: Calcinus morgani Rahayu and Forest, 1999, Pagan Island (SIO-BIC C14234).