Synalpheus regalis Duffy

Iii, Kenneth S Macdonald, Hultgren, Kristin & Duffy, Emmett, 2009, The sponge-dwelling snapping shrimps (Crustacea, Decapoda, Alpheidae, Synalpheus) of Discovery Bay, Jamaica, with descriptions of four new species, Zootaxa 2199, pp. 1-57 : 42

Synalpheus regalis Duffy

Figure 10 , Color plate 5B

Material examined. Jamaica: 96 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM3303-05), fore-reef (near M1 channel marker), Discovery Bay, from canals of Hyattella intestinalis . 56 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM4201-03), fore-reef (near M1 channel marker), Discovery Bay, from canals of H. intestinalis . 59 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM4901-03), Columbus Park, Discovery Bay, from canals of H. intestinalis . 82 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM5101-03), Columbus Park, Discovery Bay, from canals of H. intestinalis . 7 nonovigerous individuals ( VIMS 08JAM5201), Columbus Park, Discovery Bay, from canals of H. intestinalis . 24 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM5401,02,04), Columbus Park, Discovery Bay, from canals of H. intestinalis . 59 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM6001-03), Columbus Park, Discovery Bay, from canals of H. intestinalis . 66 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM6201-03), Columbus Park, Discovery Bay, from canals of H. intestinalis . 265 nonovigerous individuals, 1 ovigerous female ( VIMS 08JAM6301-03), Columbus Park, Discovery Bay, from canals of H. intestinalis . 202 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM6401-03), Columbus Park, Discovery Bay, from canals of H. intestinalis . 6 non-ovigerous individuals ( VIMS 08JAM7601), wall off Rio Bueno, from canals of H. intestinalis . 23 non-ovigerous individuals ( VIMS 08JAM7901), wall off Rio Bueno, from canals of H. intestinalis . 25 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM8601-03), wall off Rio Bueno, from canals of H. intestinalis . 265 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM9101-03), Columbus Park, Discovery Bay, from canals of H. intestinalis . 29 non-ovigerous individuals ( VIMS 08JAM9201,02), Columbus Park, Discovery Bay, from canals of H. intestinalis . 88 non-ovigerous individuals ( VIMS 08JAM9301,02), Columbus Park, Discovery Bay, from canals of H. intestinalis . 31 non-ovigerous individuals, 1 ovigerous female ( VIMS 08JAM9401,02), Columbus Park, Discovery Bay, from canals of H. intestinalis . 10 non-ovigerous individuals ( VIMS 08JAM9501), Columbus Park, Discovery Bay, from canals of H. intestinalis . 18 non-ovigerous individuals ( VIMS 08JAM9601,02), Columbus Park, Discovery Bay, from canals of H. intestinalis . MaxCL ovigerous female: 4.14 mm. MaxCL non-ovigerous individual: 3.17 mm.

Color. Translucent orange; distal portion of major chela brighter orange; embryos and ovaries pale green.

Hosts and ecology. In Jamaica, we have found S. regalis exclusively in Hyattella intestinalis , typically at depths exceeding 6 m. In Belize, the only other known locality of S. regalis , they are commonly found in Xestospongia spp. in addition to H. intestinalis .

Distribution. Belize ( Duffy 1996a, d, Macdonald et al. 2006; Ríos and Duffy 2007); Jamaica (this study).

Remarks. Synalpheus regalis is distinguishable from its close relative, S. elizabethae , by the possession in non-ovigerous colony members of abdominal pleura (pleura 3–5) that are rounded ventrally versus the ventrally pointed pleura possessed by S. elizabethae ( Fig. 10 ). Similarly to the S. elizabethae found here, S. regalis individuals in Jamaica lack a secondary spine on the major chela protuberance ( Fig. 10 ).

Figures

FIGURE 10. Synalpheus elizabethae. Non-ovigerous individual CL: 2.29 mm (08 JAM 070102) from canals of H. intestinalis, Columbus Park, Discovery Bay, Jamaica: A, ventral region of abdomen, lateral view; B, chela of major first pereopod, anterior region, ventral view. S. regalis. Non-ovigerous individual CL: 2.09 mm (08 JAM 620202) from canals of H. intestinalis, Columbus Park, Discovery Bay, Jamaica: C, ventral region of abdomen, lateral view; D, chela of major first pereopod, anterior region, ventral view. Scale bar = 0.4 mm for A, B; 0.5 mm for C, D.