Michelopagurus, MCLAUGHLIN, 1997

Lemaitre, Rafael, 2015, A new species of the hermit crab genus Michelopagurus McLaughlin, 1997 (Crustacea: Decapoda: Paguridae) from Moorea, French Polynesia, Zoosystema 37 (2), pp. 363-370 : 368

KEY TO SPECIES OF MICHELOPAGURUS MCLAUGHLIN, 1997

1. Rostrum acutely triangular, terminating in small spine ................................................................................... .................................................................. M. tangaloa n. sp. (South Pacific: French Polynesia; 485-1145 m)

— Rostrum broadly rounded, terminally unarmed ........................................................................................... 2

2. Palm of right cheliped armed on dorsomesial margin with row of distinct spines ......................................... 3

— Palm of right cheliped unarmed or at most with small tubercles on dorsomesial margin............................... 4

3. Dactyls of second and third pereopods each with ventromesial row of 11-19 corneous spines; meri of second pereopods with ventral row of spinules or tubercles ..................................... M. limatulus ( Henderson, 1888) (Indo-West Pacific: Taiwan, Philippines, Indonesia, New Caledonia, French Polynesia, possibly India; 209-1414 m)

— Dactyls of second and third pereopods each with ventromesial row of 9-11 corneous spines; meri of second pereopod with one or two distal spinules on ventral margin ........................................................................... ....................................................... M. chacei McLaughlin, 1997 (Indo-West Pacific: Indonesia; 264-425 m)

4. Palm of right cheliped with dorsal surface armed with distinct median row of small tubercles; ocular acicle terminating in small bifid spine; shield anterolateral margin rounded.................................................................. ......................................... M. richardi ( Bouvier, 1922) (northeastern Atlantic: Morocco, Mogador; 2165 m)

— Palm of right cheliped with dorsal surface with small tubercles not arranged in rows; ocular acicles terminating bluntly, each with strong submarginal spine; shield anterolateral margins angular ........................................... ........................................................... M. atlanticus ( Bouvier, 1922) (northeastern Atlantic: Azores; 1250 m)