Table 2.
Morphological characters of Paradexaminerotundogena sp. nov. and related species.
| Species | P.tafunsaka (♀) | P.bisetigera (♂) | P.levitelson (♀) | P.rotundogena sp. nov. (♀) |
|---|---|---|---|---|
| Characters | ||||
| Body length | 2.7 mm | 6.3 mm | 3.0 mm | 5.0 mm |
| Pleonites tooth formulae | 3-3-3-3-0 | 3-3-3-3 | 3-3-3-3-0 | 3-3-3-3-0 |
| Ocular lobe | round | round | round | round |
| Lower lip, corn | 2 cones | 2 cones | ? | 3 or 4 cones |
| Mandibular process | subacutely produced | subacutely produced | ? | subacutely produced |
| Mandible, accessory spines | 2 spines | 2 or 3 spines | 2 spines | 2 or 3 spines |
| Maxilla 1, palp | 2 apical setae | 2 apical setae | 6 apical setae | 1 apical seta |
| Maxilla 2, inner margin of inner plate | ? | 3 setae | ? | no seta |
| Maxilliped, inner plate | no lateral seta | no lateral seta | ? | no lateral seta |
| Maxilliped, outer plate | 12 conical teeth | 21 conical teeth | ? | 15 conical teeth |
| Antenna 1, articles 1 & 2 ratio | 1.0 : 1.3 | 1.0 : 1.5 | 1.0 : 1.5 | 1.0 : 1.2 |
| Gnathopod 1, interior setae of propodus | 5 or 6 | 6 | ? | 3 |
| Gnathopod 1, palm | steeply angled | steeply angled | transverse | steeply angled |
| Gnathopod 2, carpus & propodus ratio | 1.0 : 1.1 | 1.0 : 1.3 | 1.0 : 1.3 | 1.0 : 0.7 |
| Coxa 7 | ? | semicircular | semicircular | semicircular |
| Pereopod 7, basis | broad, regular serrations posteriorly | broad, no serrations posteriorly | broad, regular serrations posteriorly | broad, irregular serrations posteriorly |
| Telson | 3 or 4 lateral spines | 5 or 6 lateral spines | 2 or 3 lateral spines | 2 lateral spines |
| Distribution | Kosrae, Micronesia | Tomioka bay, Japan | Queensland, Australia | Korea |
| References | Myers, 1995 | Hirayama, 1984 | Myers & LeCroy, 2009 | Present study |