Pylopaguropsis, Alcock, 1905

Komai, Dwi Listyo Rahayu Tomoyuki, 2013, Two New Species Of Pylopaguropsis Alcock (Crustacea: Decapoda: Anomura: Paguridae) From The Philippines, Raffles Bulletin of Zoology 61 (2), pp. 621-631 : 630-631

KEY TO SPECIES OF PYLOPAGUROPSIS

1. Palm of right chela fringed with dense long setae ................... .................................... P. fimbriata McLaughlin & Haig, 1989 ( Indonesia, east Malaysia, Guam,and Okinawa, Japan)

– Palm of right chela not fringed with long setae.....................2

2. Left chela with 2 or more rows of spines on dorsal surface and on fixed finger..........................................................................3

– Left chela unarmed or at most with few spinules or spinulose tubercles on dorsal surface, none on fixed finger (except for P. atlantica )..................................................................................9

3. Right chela operculiform; dactyl of left cheliped unarmed....4

– Right chela non-operculiform; dactyl of left cheliped with 1 or more rows of spines or tubercles............................................5

4. Right chela with covering of small granules on dorsal surface, dorsolateral margin not delimited; dactyl of left chela unarmed ........................................ P. granulata Asakura, 2000 (Kume Island, Okinawa, Japan)

– Right chela with mixture of small and large tubercles, dorsolateral margin distinctly delimited with row of blunt spines; dactyl of left chela armed with rows of spines ......................... ....................................................... P. rahayuae Asakura, 2010 (Bohol Sea, Philippines)

5. Dorsal surface of fingers and palm of right cheliped with blunt tubercles or non-corneous-tipped, subacute spines; propodal rasp of fourth pereopod with 1 partial row of corneous scales; carpi of second pereopods armed with additional spines or spinules on dorsal margin......................................................................6

– Dorsal surface of fingers and palm with acute, corneous-tipped spines; propodal rasp of fourth pereopod with 2 rows of corneous scales; telson with terminal margin of posterior lobe slightly oblique; carpi of second pereopods armed only with dorsodistal spine; [right chela without longitudinal groove adjacent to dorsolateral margin] ............................... P. similis , new species (Bohol Sea, Philippines)

6. Ocular peduncles 0.6–0.7 times as long as shield; right chela without longitudinal groove adjacent to dorsolateral margin; dactyli of second and third pereopods 1.1–1.4 times as long as propodi; propodi of third pereopods each with 5–15 corneous spines on ventral margin ................... P. furusei Asakura, 2000 (Izu Ogasawara Arc, and Honshu to Kyushu, Japan)

– Ocular peduncles about 0.9 times as long as shield; right chela with longitudinal groove adjacent to dorsolateral margin; dactyli of second and third pereopods 1.5–1.6 times as long as propodi; propodi of third pereopods each with 1–4 corneous spines on ventral margin..........................................................................7

7. Many dorsal spines on palm of right chela with tuft of short plumose setae at base, making dorsal surface of palm setose; terminal margin of telson each with 12–16 spines extending onto lateral margin .................................................................... .............................. P. laevispinosa McLaughlin & Haig, 1989 (Okinawa, Japan)

– Many dorsal spines on palm of right chela with few short plumose setae at base, dorsal surface of palm not setose; terminal margin of telson each with 1–9 spines not extending onto lateral margin......................................................................................8

8. Carpus of left cheliped subequal to or shorter than merus; dactyli of second and third pereopods each with row of bristle-like setae on distal half of dorsal margin......................................... .............................................. P. vicina Komai & Osawa, 2004 (Kii Peninsula to Ryukyu Islands, Japan, and Moluccas, Indonesia)

– Carpus of left cheliped slightly longer than merus; dactyli of second and third pereopods each with row of stiff setae on dorsal margin, none bristle-like................................................. ............................................. P. bellula Osawa & Okuno, 2007 (Ryukyu Islands, Japan)

9. Propodal rasp of fourth pereopod consisting of 3 or 4 rows of corneous scales......................................................................10

– Propodal rasp of fourth pereopod consisting of 1 partial or complete row of corneous scales ..........................................11

10. Carpus of right cheliped with dorsolateral surface weakly armed; telson with terminal margin concave ........................................ ............................................................. P. atlantica Wass, 1963 (Southeast coast of Florida to Suriname)

– Carpus of right cheliped with dorsolateral surface moderately to strongly armed; telson with terminal margin oblique .......... ............................................. P. magnimanus Henderson, 1896 ( Northern Arabian Sea to Bay of Bengal and Srilanka)

11. Dactyl of right third pereopod appreciably broader than left, with prominent longitudinal sulcus on lateral surface dorsal to midline...................................................................................12

– Dactyl of right third pereopod not appreciably broader than left, lateral surface with or without shallow median sulcus....................................................................................................17

12. Dactyl of right chela with closely-spaced, low, flattened tubercles on dorsal surface, dorsomesial margin with plate-like tubercles; merus of left cheliped with prominent tubercle at ventromesial proximal angle ............ P. speciosa McLaughlin & Haig, 1989 (Izu Islands to Ryukyu Islands, Japan)

– Dactyl of right chela with scattered, small, spinulose tubercles, dorsomesial margin with row of acute spines; merus of left cheliped with row of spines on ventromesial margin...........13

13. Cornea not dilated at all; palm of left chela with dorsomesial row of tiny spines; [carpus of left cheliped with dorsolateral and dorsomesial rows of spines]..... P. pygmaeus , new species (Bohol Sea, Philippines)

– Cornea slightly dilated; palm of left chela unarmed or armed with few minute spinulose tubercles on dorsal surface........14

14. Ocular peduncles appreciably broader proximally than at base of corneas; carpus of left cheliped only with dorsodistal spine ..................................................................................................15

– Ocular peduncles not appreciably broader proximally than at base of corneas; carpus of left cheliped at least with dorsomesial row of spines.........................................................................16

15. Propodus of left third pereopod with 1 longitudinal sulcus ..... .......................................... P. keijii McLaughlin & Haig, 1989 (Indo-West Pacific and Hawaii)

– Propodus of left third pereopod with 3 longitudinal sulcus ..... ........................................................ P. lemaitrei Asakura, 2003 ( French Polynesia)

16. Lateral surface of propodus of right third pereopod with longitudinal sulcus on upper half.............................................. ...................................................... P. zebra ( Henderson, 1893) (Indo-West Pacific)

– Lateral surface of propodus of right third pereopod deeply concave in upper third, deep concavity in midline and small concavity near ventral margin, producing 3 prominent, longitudinal sulci. .... P. lewinsohni McLaughlin & Haig, 1989 (Gulf of Aqaba, Moluccas, Indonesia, and southern Japan)

17. Propodus of right third pereopod with lateral surface flattened; propodal rasp of fourth pereopod with 2 rows of corneous scales.......................... P. pustulosa McLaughlin & Haig, 1989 ( Somalia and Taiwan)

– Propodus of right third pereopod with lateral surface convex; propodal rasp of fourth pereopod with 1 partial row of corneous scales......................................................................................18

18. Right chela with mesial face strongly produced ventrally in proximal half, ventral surface strongly excavated in lateral half; dactyl of right third pereopod with median longitudinal sulcus on lateral surface .............................. P. teevana ( Boone, 1932) (Pacific coast of Colombia to Equador, and Galapagos)

– Right chela with mesial face not strongly produced ventrally in proximal half, ventral surface not strongly excavated in lateral half; dactyl of right third pereopod without median longitudinal sulcus on slightly convex lateral surface .................................. ....................................... P. garciai McLaughlin & Haig, 1989 (Easter Island)