31:
216:
75:
50:
455:
is low and long, comprising a quarter of the total length or more, and lacks a lower lobe. The coloration is a plain dark brown, with black markings on the dorsal fins and darker bands on the caudal fin. The maximum recorded lengths are 23 cm (9.1 in) for a male and 24 cm
287:
at a depth of 71–766 m (233–2,513 ft), typically on or near mud bottoms. One of the smallest living shark species, the pygmy ribbontail catshark grows to a maximum known length of 24 cm (9.4 in). It has a slender body with a low, ribbon-like
551:), ranking the pygmy ribbontail catshark among the world's smallest sharks. Due to the difficulties involved in assessing reproductive maturity in sharks, whether one of these species is truly smaller than the others cannot yet be definitively determined.
427:. Each nostril is preceded by a short, triangular flap of skin. The mouth is wide and V-shaped, without furrows at the corners and containing numerous rows of small, multi-pointed teeth that become more comb-like towards the sides. There are
522:
until they are ready to be born. Female pygmy ribbontail catsharks are capable of becoming pregnant at 16.6 cm (6.5 in) long, though only females over 18 cm (7.1 in) long have been found with fully developed
456:(9.4 in) for a female. One male shark 18.6 cm (7.3 in) long weighed 14 g (0.49 oz), and a pregnant female 24.2 cm (9.5 in) long weighed 37 g (1.3 oz).
1637:
531:. One or two pups are born at a time; the newborns are extremely large relative to their mothers, measuring around 11 cm (4.3 in) in length. Males reach
564:
1676:
1769:
1779:
838:
535:
at a length of 18–19 cm (7.1–7.5 in) and females at perhaps 15–16 cm (5.9–6.3 in). This is comparable to the sizes at maturity of the
1611:
1650:
1689:
709:
734:
681:
324:
The first known specimens of the pygmy ribbontail catshark were collected during the 1907–1910 Philippine
Expedition of the
1728:
1784:
831:
379:
By far the most widely (if sporadically) distributed member of its genus, the pygmy ribbontail catshark has been reported from
428:
1655:
325:
340:, Deputy Fish Commissioner and director of the expedition, published a description of this shark in a 1913 issue of the
423:
The pygmy ribbontail catshark has a thin body with a short, rounded snout and elongated, oval eyes bearing rudimentary
30:
1572:
1176:
1056:
1681:
824:
74:
1158:
1550:
1746:
563:
off the
Philippines, but are not known to be utilized. Its conservation status has not been evaluated by the
1335:
996:
914:
1512:
1005:
781:
Nair, R.V. & K.K. Appukuttan (1974). "Observations on the developmental stages of the smooth dogfish,
292:, and is dark brown in color with blackish dorsal fin markings and tail bands. This shark feeds mainly on
1577:
1038:
1029:
515:
305:
189:
807:
1720:
1733:
1559:
1418:
1391:
1284:
1277:
1253:
1218:
1209:
1047:
608:
424:
337:
331:
205:
468:
and the
Philippines. One study in Indian waters found that 55% of this shark's diet was composed of
1454:
1409:
1400:
1093:
1084:
1074:
39:
308:
with females bearing litters of 1–2 relatively large pups. It is of minimal significance to
1774:
1494:
1134:
1125:
948:
939:
544:
536:
228:
69:
1642:
464:
The pygmy ribbontail catshark is reportedly very abundant in some places, such as off southern
215:
1702:
1585:
1463:
1200:
848:
730:
705:
677:
412:
284:
146:
1707:
1564:
1668:
1436:
1382:
1344:
1262:
643:
603:
528:
364:
265:
1234:
972:
963:
674:
Sharks of the World: An
Annotated and Illustrated Catalogue of Shark Species Known to Date
532:
396:
345:
1367:
1358:
1324:
1306:
1297:
1244:
901:
885:
879:
585:
388:
126:
116:
750:
Nair, R.V. & K.K. Appukuttan (1973). "Observations on the food of deep sea sharks
1763:
1663:
1111:
594:
392:
356:
268:
261:
156:
59:
54:
647:
1590:
925:
560:
477:
440:
384:
272:
631:
1624:
1544:
1191:
473:
404:
368:
360:
280:
1481:
1445:
1020:
987:
873:
816:
493:
485:
452:
444:
436:
297:
289:
1535:
1427:
1149:
469:
328:
309:
293:
166:
86:
1598:
1529:
867:
519:
448:
380:
276:
106:
1741:
1616:
1603:
508:
408:
400:
313:
257:
1629:
861:
810:
ReefQuest Centre for Shark
Research. Retrieved on September 27, 2009.
500:
489:
411:
shark occurs at depths of 71–766 m (233–2,513 ft) on outer
96:
1506:
439:
are of comparable size, the first positioned slightly closer to the
676:. Rome: Food and Agricultural Organization. p. 373–374.
1715:
891:
632:"Description of a new carcharioid shark from the Sulu Archipelago"
524:
504:
465:
349:
344:, naming it for the expedition's General Assistant and Naturalist
301:
136:
1694:
497:
432:
1510:
820:
481:
359:
is a 23 cm (9.1 in) long adult female caught off
559:
Pygmy ribbontail catsharks are captured incidentally in
527:, suggesting that they grow substantially during the
1519:
1480:
1380:
1356:
1343:
1323:
1295:
1275:
1242:
1233:
1189:
1147:
1123:
1110:
1082:
1073:
1018:
985:
961:
937:
924:
900:
700:Compagno, L.J.V.; M. Dando & S. Fowler (2005).
518:, with the developing young being sustained by a
704:. Princeton University Press. pp. 255–256.
695:
693:
636:Proceedings of the United States National Museum
609:10.2305/IUCN.UK.2019-3.RLTS.T161468A140358808.en
342:Proceedings of the United States National Museum
507:, and the remainder of other items including a
584:Pollom, R.; Ebert, D.A.; Jabado, R.W. (2019).
565:International Union for Conservation of Nature
431:on the roof of the mouth and the edges of the
832:
8:
1507:
1353:
1239:
1120:
1079:
934:
839:
825:
817:
667:
665:
663:
661:
659:
657:
214:
48:
29:
20:
607:
802:
800:
576:
223:Range of the pygmy ribbontail catshark
808:What is the Smallest Species of Shark?
271:, distributed patchily in the western
727:Sharks of the Order Carcharhiniformes
7:
1747:9D28A88D-8BD0-4C1A-BBB4-6B1F69D0C5C5
1721:22C9F835-DE06-B1DF-2706-AA90D3D96114
415:or upper slopes, commonly over mud.
1770:IUCN Red List least concern species
595:IUCN Red List of Threatened Species
1780:Taxa named by Hugh McCormick Smith
14:
283:. It occurs around the edges of
73:
729:. Blackburn Press. p. 24.
648:10.5479/si.00963801.45-2003.599
413:continental and insular shelves
285:continental and insular shelves
348:, and creating for it the new
1:
1177:African ribbontail catshark (
1057:Straight-tooth weasel shark (
806:Martin, R.A. (July 28, 1999)
630:Smith, H.M. (June 21, 1913).
785:Smith from Gulf of Mannar".
1168:Pygmy ribbontail catshark (
1159:Cuban ribbontail catshark (
1801:
24:Pygmy ribbontail catshark
997:Australian weasel shark (
856:
725:Compagno, L.J.V. (2003).
672:Compagno, L.J.V. (1984).
250:pygmy ribbontail catshark
234:
227:
222:
213:
195:
188:
70:Scientific classification
68:
46:
37:
28:
23:
1006:Sicklefin weasel shark (
787:Indian Journal of Fishes
764:Indian Journal of Fishes
762:Compagno and Springer".
447:and the second over the
375:Distribution and habitat
1039:Atlantic weasel shark (
1030:Whitetip weasel shark (
602:: e.T161468A140358808.
1785:Fish described in 1913
1419:Scalloped hammerhead (
1392:Scalloped bonnethead (
1285:Dwarf false catshark (
1254:Slender smooth-hound (
1210:Magnificent catshark (
1048:Slender weasel shark (
1455:Smalleye hammerhead (
1410:Carolina hammerhead (
1401:Whitefin hammerhead (
1094:Barbeled houndshark (
541:Squaliolus laticaudus
516:aplacental viviparous
425:nictitating membranes
306:aplacental viviparous
1565:Eridacnis_radcliffei
1551:Eridacnis radcliffei
1521:Eridacnis radcliffei
1135:Harlequin catshark (
949:Snaggletooth shark (
783:Eridacnis radcliffei
756:Eridacnis radcliffei
588:Eridacnis radcliffei
338:Hugh McCormick Smith
326:U.S. Fish Commission
254:Eridacnis radcliffei
199:Eridacnis radcliffei
1464:Smooth hammerhead (
1349:(Hammerhead sharks)
1201:Graceful catshark (
1116:(Finback catsharks)
702:Sharks of the World
460:Biology and ecology
237:Proscyllium alcocki
40:Conservation status
1437:Great hammerhead (
1263:Sulu gollumshark (
752:Halaeurus hispidus
555:Human interactions
545:dwarf lanternshark
537:spined pygmy shark
312:, being caught as
181:E. radcliffei
1757:
1756:
1703:Open Tree of Life
1513:Taxon identifiers
1504:
1503:
1476:
1475:
1319:
1318:
1229:
1228:
1106:
1105:
1069:
1068:
973:Hooktooth shark (
711:978-0-691-12072-0
642:(2003): 599–601.
549:Etmopterus perryi
246:
245:
241:
147:Carcharhiniformes
63:
1792:
1750:
1749:
1737:
1736:
1724:
1723:
1711:
1710:
1698:
1697:
1685:
1684:
1672:
1671:
1659:
1658:
1646:
1645:
1633:
1632:
1620:
1619:
1607:
1606:
1594:
1593:
1581:
1580:
1568:
1567:
1555:
1554:
1553:
1540:
1539:
1538:
1508:
1487:
1368:Winghead shark (
1354:
1350:
1330:
1307:False catshark (
1240:
1121:
1117:
1080:
999:H. australiensis
935:
931:
907:
906:(Requiem sharks)
841:
834:
827:
818:
811:
804:
795:
794:
778:
772:
771:
747:
741:
740:
722:
716:
715:
697:
688:
687:
669:
652:
651:
627:
621:
620:
618:
616:
611:
581:
529:gestation period
514:Reproduction is
435:arches. The two
365:Sulu Archipelago
262:finback catshark
239:
218:
201:
78:
77:
57:
52:
51:
33:
21:
16:Species of shark
1800:
1799:
1795:
1794:
1793:
1791:
1790:
1789:
1760:
1759:
1758:
1753:
1745:
1740:
1732:
1727:
1719:
1714:
1706:
1701:
1693:
1688:
1680:
1675:
1667:
1662:
1654:
1649:
1641:
1636:
1628:
1623:
1615:
1610:
1602:
1597:
1589:
1584:
1576:
1571:
1563:
1558:
1549:
1548:
1543:
1534:
1533:
1528:
1515:
1505:
1500:
1485:
1484:
1472:
1376:
1348:
1347:
1339:
1328:
1327:
1315:
1291:
1271:
1235:Pseudotriakidae
1225:
1185:
1143:
1115:
1114:
1102:
1065:
1032:P. leucolomatus
1014:
981:
957:
930:(Weasel sharks)
929:
928:
920:
905:
904:
896:
852:
845:
815:
814:
805:
798:
780:
779:
775:
749:
748:
744:
737:
724:
723:
719:
712:
699:
698:
691:
684:
671:
670:
655:
629:
628:
624:
614:
612:
583:
582:
578:
573:
557:
533:sexual maturity
462:
421:
409:bottom-dwelling
397:Andaman Islands
377:
346:Lewis Radcliffe
322:
316:in some areas.
209:
203:
197:
184:
72:
64:
53:
49:
42:
17:
12:
11:
5:
1798:
1796:
1788:
1787:
1782:
1777:
1772:
1762:
1761:
1755:
1754:
1752:
1751:
1738:
1725:
1712:
1699:
1686:
1673:
1660:
1647:
1634:
1621:
1608:
1595:
1582:
1569:
1556:
1541:
1525:
1523:
1517:
1516:
1511:
1502:
1501:
1499:
1498:
1490:
1488:
1478:
1477:
1474:
1473:
1471:
1470:
1461:
1452:
1443:
1434:
1425:
1416:
1407:
1398:
1388:
1386:
1378:
1377:
1375:
1374:
1364:
1362:
1351:
1341:
1340:
1336:Scyliorhinidae
1333:
1331:
1325:Scyliorhinidae
1321:
1320:
1317:
1316:
1314:
1313:
1303:
1301:
1293:
1292:
1283:
1281:
1273:
1272:
1270:
1269:
1260:
1250:
1248:
1237:
1231:
1230:
1227:
1226:
1224:
1223:
1216:
1207:
1197:
1195:
1187:
1186:
1184:
1183:
1174:
1165:
1155:
1153:
1145:
1144:
1142:
1141:
1131:
1129:
1118:
1108:
1107:
1104:
1103:
1101:
1100:
1090:
1088:
1077:
1075:Leptochariidae
1071:
1070:
1067:
1066:
1064:
1063:
1054:
1045:
1036:
1026:
1024:
1016:
1015:
1013:
1012:
1003:
993:
991:
983:
982:
980:
979:
969:
967:
959:
958:
956:
955:
945:
943:
932:
922:
921:
919:
918:
915:Carcharhinidae
910:
908:
902:Carcharhinidae
898:
897:
895:
894:
888:
886:Elasmobranchii
882:
880:Chondrichthyes
876:
870:
864:
857:
854:
853:
846:
844:
843:
836:
829:
821:
813:
812:
796:
773:
760:Iago omanensis
742:
735:
717:
710:
689:
682:
653:
622:
575:
574:
572:
569:
556:
553:
461:
458:
420:
417:
389:Gulf of Mannar
376:
373:
321:
318:
296:, followed by
244:
243:
232:
231:
225:
224:
220:
219:
211:
210:
204:
193:
192:
186:
185:
178:
176:
172:
171:
164:
160:
159:
154:
150:
149:
144:
140:
139:
134:
130:
129:
127:Elasmobranchii
124:
120:
119:
117:Chondrichthyes
114:
110:
109:
104:
100:
99:
94:
90:
89:
84:
80:
79:
66:
65:
47:
44:
43:
38:
35:
34:
26:
25:
15:
13:
10:
9:
6:
4:
3:
2:
1797:
1786:
1783:
1781:
1778:
1776:
1773:
1771:
1768:
1767:
1765:
1748:
1743:
1739:
1735:
1730:
1726:
1722:
1717:
1713:
1709:
1704:
1700:
1696:
1691:
1687:
1683:
1678:
1674:
1670:
1665:
1661:
1657:
1652:
1648:
1644:
1639:
1635:
1631:
1626:
1622:
1618:
1613:
1609:
1605:
1600:
1596:
1592:
1587:
1583:
1579:
1574:
1570:
1566:
1561:
1557:
1552:
1546:
1542:
1537:
1531:
1527:
1526:
1524:
1522:
1518:
1514:
1509:
1496:
1492:
1491:
1489:
1486:(Houndsharks)
1483:
1479:
1469:
1467:
1462:
1460:
1458:
1453:
1451:
1449:
1444:
1442:
1440:
1435:
1433:
1431:
1426:
1424:
1422:
1417:
1415:
1413:
1408:
1406:
1404:
1399:
1397:
1395:
1390:
1389:
1387:
1385:
1384:
1379:
1373:
1371:
1366:
1365:
1363:
1361:
1360:
1355:
1352:
1346:
1342:
1337:
1332:
1326:
1322:
1312:
1310:
1305:
1304:
1302:
1300:
1299:
1298:Pseudotriakis
1294:
1290:
1288:
1282:
1280:
1279:
1274:
1268:
1266:
1261:
1259:
1257:
1256:G. attenuatus
1252:
1251:
1249:
1247:
1246:
1241:
1238:
1236:
1232:
1222:
1221:
1217:
1215:
1213:
1212:P. magnificum
1208:
1206:
1204:
1199:
1198:
1196:
1194:
1193:
1188:
1182:
1180:
1175:
1173:
1171:
1170:E. radcliffei
1166:
1164:
1162:
1157:
1156:
1154:
1152:
1151:
1146:
1140:
1138:
1133:
1132:
1130:
1128:
1127:
1122:
1119:
1113:
1112:Proscylliidae
1109:
1099:
1097:
1092:
1091:
1089:
1087:
1086:
1081:
1078:
1076:
1072:
1062:
1060:
1055:
1053:
1051:
1046:
1044:
1042:
1041:P. pectoralis
1037:
1035:
1033:
1028:
1027:
1025:
1023:
1022:
1017:
1011:
1009:
1008:H. microstoma
1004:
1002:
1000:
995:
994:
992:
990:
989:
984:
978:
976:
975:C. macrostoma
971:
970:
968:
966:
965:
960:
954:
952:
947:
946:
944:
942:
941:
936:
933:
927:
923:
916:
912:
911:
909:
903:
899:
893:
889:
887:
883:
881:
877:
875:
871:
869:
865:
863:
859:
858:
855:
850:
842:
837:
835:
830:
828:
823:
822:
819:
809:
803:
801:
797:
793:(1): 141–151.
792:
788:
784:
777:
774:
770:(2): 575–583.
769:
765:
761:
757:
753:
746:
743:
738:
736:1-930665-76-8
732:
728:
721:
718:
713:
707:
703:
696:
694:
690:
685:
683:92-5-101384-5
679:
675:
668:
666:
664:
662:
660:
658:
654:
649:
645:
641:
637:
633:
626:
623:
610:
605:
601:
597:
596:
591:
589:
580:
577:
570:
568:
566:
562:
561:bottom trawls
554:
552:
550:
546:
542:
538:
534:
530:
526:
521:
517:
512:
510:
506:
502:
499:
495:
491:
487:
483:
479:
478:bristlemouths
475:
474:lanternfishes
471:
467:
459:
457:
454:
450:
446:
442:
438:
434:
430:
426:
418:
416:
414:
410:
406:
402:
398:
394:
393:Bay of Bengal
390:
386:
382:
374:
372:
370:
366:
362:
358:
357:type specimen
354:
351:
347:
343:
339:
335:
334:
330:
327:
319:
317:
315:
311:
307:
303:
299:
295:
291:
286:
282:
278:
274:
270:
269:Proscylliidae
267:
263:
259:
255:
251:
242:
238:
233:
230:
226:
221:
217:
212:
207:
202:
200:
194:
191:
190:Binomial name
187:
183:
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177:
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165:
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158:
157:Proscylliidae
155:
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137:Selachimorpha
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133:Subdivision:
132:
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55:Least Concern
45:
41:
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27:
22:
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1520:
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1446:Bonnethead (
1438:
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1411:
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1369:
1357:
1308:
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1265:G. suluensis
1264:
1255:
1243:
1219:
1211:
1202:
1190:
1178:
1169:
1167:
1160:
1148:
1137:C. fehlmanni
1136:
1124:
1095:
1085:Leptocharias
1083:
1058:
1049:
1040:
1031:
1019:
1007:
998:
986:
974:
964:Chaenogaleus
962:
950:
938:
926:Hemigaleidae
890:Subdivision
849:ground shark
790:
786:
782:
776:
767:
763:
759:
755:
751:
745:
726:
720:
701:
673:
639:
635:
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613:. Retrieved
599:
593:
587:
579:
558:
548:
540:
513:
463:
422:
385:Gulf of Aden
378:
352:
341:
332:
323:
273:Indo-Pacific
253:
249:
247:
236:
235:
198:
196:
180:
179:
167:
18:
1625:iNaturalist
1545:Wikispecies
1439:S. mokarran
1428:Scoophead (
1412:S. gilberti
1329:(Catsharks)
1309:P. microdon
1220:P. venustum
1203:P. habereri
1192:Proscyllium
1161:E. barbouri
1050:P. randalli
951:H. elongata
940:Hemipristis
615:19 November
494:stomatopods
486:crustaceans
470:bony fishes
445:pelvic fins
437:dorsal fins
419:Description
405:Philippines
369:Philippines
361:Jolo Island
298:crustaceans
294:bony fishes
281:Philippines
240:Misra, 1950
206:H. M. Smith
1764:Categories
1466:S. zygaena
1403:S. couardi
1370:E. blochii
1345:Sphyrnidae
1278:Planonasus
1179:E. sinuans
1096:L. smithii
1021:Paragaleus
988:Hemigaleus
874:Vertebrata
872:Subphylum
758:Smith and
571:References
543:) and the
503:), 14% of
484:), 28% of
480:and small
453:caudal fin
403:, and the
123:Subclass:
1775:Eridacnis
1495:Triakidae
1482:Triakidae
1448:S. tiburo
1421:S. lewini
1394:S. corona
1287:P. parini
1150:Eridacnis
884:Subclass
754:(Alcock)
492:but also
476:but also
443:than the
353:Eridacnis
333:Albatross
310:fisheries
300:and then
175:Species:
168:Eridacnis
93:Kingdom:
87:Eukaryota
1643:11327053
1599:FishBase
1530:Wikidata
1457:S. tudes
1430:S. media
1359:Eusphyra
1126:Ctenacis
1059:P. tengi
892:Selachii
868:Chordata
862:Animalia
860:Kingdom
567:(IUCN).
520:yolk sac
488:(mainly
472:(mainly
449:anal fin
441:pectoral
429:papillae
381:Tanzania
320:Taxonomy
304:. It is
290:tail fin
277:Tanzania
229:Synonyms
153:Family:
107:Chordata
103:Phylum:
97:Animalia
83:Domain:
60:IUCN 3.1
1742:ZooBank
1708:3595038
1682:1443571
1617:2418845
1536:Q499477
1383:Sphyrna
866:Phylum
851:species
847:Extant
525:fetuses
509:bivalve
451:. The
407:. This
401:Vietnam
363:in the
329:Steamer
314:bycatch
279:to the
258:species
256:) is a
163:Genus:
143:Order:
113:Class:
58: (
1734:220034
1695:220034
1669:161468
1656:160564
1630:100349
1578:681828
1245:Gollum
878:Class
733:
708:
680:
501:larvae
490:shrimp
395:, the
391:, the
387:, the
383:, the
355:. The
266:family
208:, 1913
1729:WoRMS
1716:Plazi
1638:IRMNG
1591:6GNR2
1493:(see
1334:(see
913:(see
505:squid
466:India
350:genus
302:squid
275:from
1690:OBIS
1677:NCBI
1664:IUCN
1651:ITIS
1612:GBIF
1604:5919
1573:BOLD
731:ISBN
706:ISBN
678:ISBN
617:2021
600:2019
498:crab
496:and
482:eels
433:gill
248:The
1586:CoL
1560:ADW
644:doi
604:doi
260:of
1766::
1744::
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799:^
791:21
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768:20
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692:^
656:^
640:45
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399:,
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