Eurycyde bamberi
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Ordo: Pantopoda
Familia: Ammotheidae
Genus: Eurycyde
Name
Eurycyde bamberi de León-Espinosa & de León-González, 2015 sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
Material examined
Holotype (1 male), Ojo de Liebre bay, Guerrero Negro, Baja California Sur, scallop fishing area: El Datil, 27°48'43"N, 114°15'06"W, (UANL-FCB-PYCNO-0031), AD-1, (1), 01/12/2012.
Description
Proboscis articulated, proximal portion a cylindrical tube approximately one quarter of the total size, distal part pyriform, 3 smooth lips (Fig. 1A–B). Chelifores with three segments, first scape segment slightly longer than second, with a long spine at the distal part directed forward, second scape segment with five ventrolateral spines and a smaller dorsal spine. Third segment approximately 1/3 the size of the second one, spineless, widening towards the distal part, ending in a smooth chela without auxiliary teeth (Fig. 1C).
Palp consists of ten segments, first one short, 0.05 mm long, second segment shorter than first one (1/3 its length), third segment approximately 0.55 mm long with two dorsal spines between the second and final third of the segment; the fourth segment smaller, 1/3 of the third one, with a spine on the distal end; fifth segment as long as the third one, with a line of lateral spines aligned forward starting in the second third of the segment and ending at the distal end; sixth segment small, half the size of the fourth, with three spines on the ventrodistal end, two on the ventral side and one at the dorsodistal end; seventh to ninth segments similar in both size and shape, with two rows of spines running along the entire ventral surface; tenth segment smaller than previous ones, with a row of spines on the ventral surface (Fig. 1D).
Small ocular tubercle, inserted at edge of cephalic segment, without lateral spines, twice as tall as its diameter capped with an inverted cone, with four pronounced eyes (Fig. 1B).
Trunk compact, spineless, suture lines slightly marked (Fig. 1A–B).
Lateral processes smooth, well-developed, longer than the width of the body and without spines or tubercles, separated by less than half of their own diameter.
With four long, slender walking leg pairs. Coxa I very short (0.1mm) with two thick dorsolateral tubercles, coxa II longer (0.17mm) with two short spines, one median dorsal and one ventrodistal, coxa III (0.14mm) slightly shorter than coxa II, with two short ventral spines, one median and one at the dorsodistal end. Femur smooth, armed with three long distal spines, one dorsal and two lateral. Tibiae I and II long, nearly subequal. Tibia I, armed with three dorsal and two mid-lateral spines, a long dorsodistal spine, seven ventral spines, smaller, in a row and two longer distal spines. Tibia II, with six long dorsal spines and a ventral row with 22 smaller setae. Tarsus, with a ventral row formed by eight setae. Propodus slightly curved, armed with seven dorsal spines and a ventral row of 19 sole spines. Thick claw, without auxiliary claws (Fig. 1F).
Oviger composed of 10 segments, first three short, segments 1 and 3 subequal, segment 2 slightly longer, fourth and fifth segments long and subequal, first to fourth segments without spines or setae, fifth segment with a ventral row of five moderately sized setae, sixth segment 2/3 the length of segment 5, with three ventral and two apical setae located dorsally, seventh to tenth segments smaller, with two rows of spines, the first row with the formula 7: 5: 5: 8, and the second row of spines similar in shape, but smaller than the first ones with the formula 9: 7: 6: 8. Last segment ends in a thick terminal claw (Fig. 1E). Eggs not observed.
Long cylindrical abdomen, extended at an angle of 45°, exceeding the length of the lateral processes and first coxae combined, of the fourth pair of legs; distal end of abdomen with 7 long thin spines, the rest smooth (Fig. 1B).
Standard measurements
Proboscis 1.3 mm long, divided in two segments, proximal one of 0.35 mm long, distal segment 0.95 mm long, 0.35 mm wide.
Body 1.5 mm long from anterior end of cephalic segment to end of fourth lateral processes, 1 mm wide between second pair of lateral processes.
Leg 1 3.72 mm long from coxa I to the tip of main claw. Coxa I, 0.1 mm, coxa II, 0.17 mm, coxa III, 0.14 mm, femur 0.81 mm, tibia I, 0.89 mm, tibia II, 0.97 mm, tarsus, 0.08 mm, propodus 0.44 mm, claw 0.12 mm.
Oviger 2.45 mm long, first segment 0.09 mm, second 0.11 mm, third 0.09 mm, fourth 0.62 mm, fifth 0.56 mm, sixth 0.40 mm, seventh 0.2 mm, eighth 0.13 mm, ninth 0.12 mm, tenth 0.13 mm.
Distribution
This species is known only from Ojo de Liebre bay, Guerrero Negro, Baja California Sur, Mexico.
Etymology
Specific name is in honor of Roger Bamber for his great work on the knowledge of pycnogonids, who died recently on February 16, 2015.
Remarks
Eurycyde is a relatively small genus. Until the present report, it was represented by 19 species and of these, only Eurycyde spinosa Hilton, 1916 and Eurycyde clitellaria Stock, 1955 have been previously recorded for the eastern Pacific. The first one was described from Laguna Beach, California, the second described from the Virgin Islands in the Caribbean Sea and later reported from Tenacatita Bay, Jalisco by Child (1979)[1]. This report is the third finding of a species of Eurycyde in the eastern Pacific. Table 1 shows important characteristic features of these Eurycyde species.
| Species | Plumose spines | Lateral processes | Coxa I | Ocular tubercle shape | Type locality | Reference |
|---|---|---|---|---|---|---|
| Eurycyde acanthopus Stock, 1979 | Present on 1st and 2nd tibia | With a dorsal spine | With two tall dorsal pointed spines | Tall and slender, without distal spines | Caracas, Venezuela | Stock (1979)[2] |
| Eurycyde antarctica Child, 1987 | Present on 1st tibia | With a short dorsal tubercle inserted distally | Without associated structures | With broad base tapering to slender anterior tip, with four tiny slender tubercles | Adare Peninsula, Ross Sea | Child (1987)[3] |
| Eurycyde arctica Child, 1995 | Absent | With a short dorsal tubercle inserted distally | With two short latero-dorsal spines | Short, twice taller than its diameter | Amchitka Island, Aleutians | Child (1995)[4] |
| Eurycyde bamberi sp.n. | Absent | Without associated structures | With two thick dorsolateral spines | Short, globose, distally pointed, twice taller than its diameter | Ojo de Liebre Bay, Baja California Sur, México | This work |
| Eurycyde clitellaria Stock, 1955 | Present on 1st and 2nd tibia | With a dorsal spine | With two tall dorsal pointed spines | Tall and slender, with subdistal spines | Virgin Islands, Caribbean Sea | Muller and Krapp (2009)[5] |
| Eurycyde curvata Child, 1979 | Present on 1st and 2nd tibia | With a distal and lateral tubercles | With five tubercles inserted distally | Thin and tall, without distal spines | Cabo de la Vela, Colombia, Caribbean | Child (1979)[1] |
| Eurycyde depressa Child, 1995 | Absent | With two short latero-dorsal spines | With 3-4 short spines | Very low, as wide as tall | Semisopochnoi Island, Aleutians | Child (1995)[4] |
| Eurycyde diacantha Stock, 1990 | Present on distal end of femur, 1st and 2nd tibia | Without associated structures | With two heavy, almost triangular, pointed tubercles | Short, 2.5 times longer than its diameter | Cape Verde Islands | Stock (1990)[6] |
| Eurycyde flagella Nakamura & Chullasorn, 2000 | Present on chelifore, coxae I and II, and on ocular tubercle | First to third pairs of lateral processes with tall tubercles, fourth pair with low tubercles | With two long feathered spines on first two coxae | Tall, slender, four times longer than it´s diameter, with three feathered spines at tip | Puket Island, Thailand | Nakamura and Chullasorn (2000)[7] |
| Eurycyde gorda Child, 1979 | Present on coxa II, distal end of femur, 1st and 2nd tibia | Without associated structures | Without associated structures | Short, thick, with a distal circle of pointed spines | Galeta Island, Panamá, Caribbean | Child (1979)[1] |
| Eurycyde hispida (Krøyer, 1844) | Present on legs and abdomen | With a setae inserted laterally | Without associated structures | Tall and thin | Greenland | Nakamura and Chullasorn (2000)[7] |
| Eurycyde longioculata Muller, 1990 | Absent | Without associated structures | With two thick dorsolateral spines, anterior one smaller than posterior one on first three pairs of coxae, last pair with equal size protuberances | Tall and thin, with more than five distal spines | Bora Bora, Society Islands, South Pacific | Müller (1990)[8] |
| Eurycyde longisetosa Hilton, 1942 | Present on distal end of femur, 1st and 2nd tibia | Without associated structures | With two latero-dorsal tubercles inserted distally | Short and slender, with two long and thin distal spines | Utria Harbor, Pacific of Colombia | Hilton (1942c)[9] |
| Eurycyde muricata Child, 1995 | Present along body | Present with 3-5 short spines | With two long lateral and one dorsal spines | Tall and slender, globose distally | Rat Islands Group, Aleutians | Child (1995)[4] |
| Eurycyde platyspina Stock, 1992 | Present on coxa II and III, distal end of femur, 1st and 2nd tibia | Present, a short dorsal tubercle inserted distally and some scattered spines | With two latero-dorsal tubercles inserted distally and two proximal spines | Short, three times taller than its diameter | North to Rio de Janeiro, Brasil | Stock (1992)[10] |
| Eurycyde raphiaster Loman, 1912 | Absent | With a dorsal tiny spine | With two protuberances, anterior one smaller than posterior one on first three pairs of coxae, last pair with equal size protuberances | With six long apical spines | Originally described from Monaco; type locality not specified, other records are from Caribbean Sea and Cape Verde Islands | Loman (1912)[11]; Hedgpeth (1948)[12] |
| Eurycyde sertula Child, 1991 | Present along body | First to third pairs of lateral processes with conical tubercles, fourth pair with smaller tubercles | First to third pairs of coxae with a small conical antero-distal tubercle, and a larger postero-distal tubercle armed with two long plumose spines | Short, 2.5 times longer than its diameter, with five long apical spines | Guam island, Philippine Sea | Child (1991)[13] |
| Eurycyde setosa Child, 1988 | Present along legs from coxae to tibia II | With a short rounded distal tubercle that decrease in size from anterior to posterior lateral processes | With two heavy, almost triangular, pointed tubercles, anterior one shorter than posterior one, both covered by tiny spines | Three times as long as maximum diameter, with seven spines inserted distally | Batan Island, Philippines | Child (1988)[14] |
| Eurycyde spinosa Hilton, 1916 | Absent | Without associated structures | With two thick dorsolateral spines and a single large spine | Short, conical | Laguna Beach, California | Hilton (1916)[15] |
| Eurycyde unispina Stock, 1986 | Present on 1st and 2nd tibia | Without associated structures | With a tall dorsal spur | Strongly pointed, with a distal spine | Straits of Florida | Stock (1986)[16] |
The following species are illustrated and described in full since their previous descriptions are quite outdated and in some cases, like Nymphopsis duodorsospinosa, very incomplete. This will help facilitate future identification of eastern Pacific pycnogonids as well as help to differentiate new species as they are collected and described from this region.
Original Description
- de León-Espinosa, A; de León-González, J; 2015: Pycnogonids associated with the giant lion´s-paw scallop Nodipecten subnodosus (Sowerby) in Ojo de Liebre Bay, Guerrero Negro, Baja California Sur, Mexico ZooKeys, (530): 129-149. doi
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Other References
- ↑ 1.0 1.1 1.2 Child C (1979) Shallow-water Pycnogonida of the Isthmus of Panama and the Coasts of Middle America. Smithsonian Contributions to Zoology 293: 1–86. doi: 10.5479/si.00810282.293
- ↑ Stock J (1979) Pycnogonida from the mediolittoral and infralittoral zones in the tropical Western Atlantic. Studies on the Fauna of Curaçao and other Caribbean Islands 59(184): 1–32.
- ↑ Child C (1987) The Pycnogonida Types of H.V.M. Hall. Proceedings of the Biological Society of Washington 100(3): 552–558.
- ↑ 4.0 4.1 4.2 Child C (1995) Pycnogonida of the Western Pacific Islands, XI: Collections from the Aleutians and other Bering Sea Islands, Alaska. Smithsonian Contributions to Zoology 569: 1–30. doi: 10.5479/si.00810282.569
- ↑ Muller H, Krapp F (2009) The pycnogonid fauna (Pycnogonida, Arthropoda) of the Tayrona national park and adjoining areas on the Caribbean coast of Colombia. Zootaxa 2319: 1–138.
- ↑ Stock J (1990) Macaronesian Pycnogonida. CANCAP-project. Contribution no.78. Zoologische Mededelingen 63(16): 205–233.
- ↑ 7.0 7.1 7.2 Nakamura K, Chullasorn S (2000) Eurycyde flagella, a new pycnogonid species from Phuket Island, Thailand. Publications Seto Marine Biological Laboratory 39(1): 1–7. http://hdl.handle.net/2433/176295
- ↑ Müller H (1990) Flachwasser-Pantopoden von Bora Bora, Gesellschaftsinseln, S-Pazifik, mit zwei Neubeschreibungen (Pantopoda). Senckenbergiana biológica 70 (1989) (1/3): 185–201.
- ↑ Hilton W (1942c) Pycnogonids from the Allan Hancock Expeditions. Allan Hancock Pacific Expeditions (University of Southern California) 5(9): 277–339.
- ↑ Stock J (1992) Pycnogonida from Southern Brazil. Tijdschrift voor Entomologie 135: 113–139.
- ↑ Loman J (1912) Note préliminaire sur les “Podosomata” Pycnogonides du Musée Océanographique de Monaco. Bulletin l´Institut Ocánographique, Monaco 238: 1–14.
- ↑ Hedgpeth J (1948) The Pycnogonida of the western North Atlantic and the Caribbean. Proceedings of the United States National Museum 97(3216): 157–342.
- ↑ Child C (1991) Pycnogonida of the Western Pacific Islands, IX. A shallow-water Guam survey, 1984. Proceedings of the Biological Society of Washington 104(1): 138–146.
- ↑ Child C (1988) Pycnogonida of the Western Pacific Islands, III: Recent Smithsonian-Philippine Expeditions. Smithsonian Contributions to Zoology 468: 1–32. doi: 10.5479/si.00810282.468
- ↑ Hilton W (1916) The nervous system of Pycnogonids. Journal of Comparative Neurology 26(5): 463–472. doi: 10.1002/cne.900260502
- ↑ Stock J (1986) Pycnogonida from the Caribbean and the Straits of Florida. Bulletin of Marine Science 38(3): 399–441.
