Achelia sawayai Marcus, 1940

Müller, Hans-Georg & Krapp, Franz, 2009, The pycnogonid fauna (Pycnogonida, Arthropoda) of the Tayrona National Park and adjoining areas on the Caribbean coast of Colombia 2319, Zootaxa 2319 (1), pp. 1-138 : 17-21

publication ID

https://doi.org/ 10.11646/zootaxa.2319.1.1

DOI

https://doi.org/10.5281/zenodo.5327902

persistent identifier

https://treatment.plazi.org/id/03E687F8-2957-FFA6-7ADC-142D9D9DFD83

treatment provided by

Felipe

scientific name

Achelia sawayai Marcus, 1940
status

 

Achelia sawayai Marcus, 1940 View in CoL

Figs. 4–5 View FIGURE 4 View FIGURE 5

Achelia sawayai Marcus, 1940: 81 View in CoL .

Achelia sawayai: Krapp & Kraeuter 1976: 342 View in CoL (literature). Child 1979: 1–86. Stock 1979: 9. Child 1982: 356. Stock 1986: 400, 415. Müller 1989: 123. Stock 1989: 87. Müller 1990: 186. Müller 1990 x: 105. Müller 1990 y: 277. Stock 1990: 205. Müller 1992:43

Material: 3.— 6 males (1 ov.), 2 fem. (gravid), 1 juv. ( SMF 1540 About SMF ), under large stone blocks on a sandy bottom, ca. 0.5m, 30.XII.1985 .

6.— 5 males (2 ov.), 13 fem. (8 gravid), 4 juv. ( SMF 1541 About SMF ), Thalassia , 2 m, 1.VIII.1985 . 5 males (2 ov.), 2 fem. (2 gravid) ( SMF 1542 About SMF ), same locality, 10.IX.1985 . 5 males (1ov.), 8 females ( SMF 1543 About SMF ), same locality, 3 m, 9.X.1985 . 2 males (1 ov.), 1 juv. ( SMF 1544 About SMF ), same locality, 12.XII.1985 .

7.— 4 males (1 ov.) ( SMF 1545 About SMF ), from Syringodium , 3 m, 12.XII.1985 .

8.— 1 male ( SMF 1546 About SMF ), jetty piles exposed to light, encrusted by corallinaceous red algae and hydroids, 0-1 m, 24.IV.1985 . 1 male, 2 fem. ( SMF 1547 About SMF ), jetty piles exposed to light, encrusted by algae and poriferans, 10.V.1985 . 1 male ( SMF 1548 About SMF ), from poriferans and hydroids on shaded jetty piles, 0–1 m, 14.V.1985 . 4 males (3 ov.), 4 fem. ( SMF 1549 About SMF ), piles of jetty exposed to light with poriferans and hydroids, 0–1 m, 14.V.1985 . 3 males (1ov.) ( SMF 1550 About SMF ), shaded jetty piles with poriferans and hydroids, 0–1 m, 19.V.1985 . 1 fem. (gravid) ( SMF 1551 About SMF ), shaded jetty piles with poriferans and hydroids, 1–3 m, 17.VI.1985 . 1 male ( SMF 1552 About SMF ), piles of jetty exposed to light with detritus and Cnidoscyphus , 0–1m, 31.VII.1985 . 4 males (3 ov.), 9 fem. (6 gravid) ( SMF 1553 About SMF ), shaded jetty piles with Cnidoscyphus , 0–1 m, 17.X.1985 . 1 male, 2 fem. (1 gravid) ( SMF 1554 About SMF ), same locality, 24.XI.1985 . 1 male, 1 fem. (gravid) ( SMF 1555 About SMF ), same locality, with different encrusting organisms, 0–1 m, 17.XII.1985 . 1 male (ov.) ( SMF 1556 About SMF ), same locality, with hydroids, 0–2 m, 1.II.1986 . 2males, 1 fem. (gravid) ( SMF 1557 About SMF ), same locality, with poriferans and hydroids, 0–1 m, 14.III.1986 .

9.— 1 juv. ( SMF 1558 About SMF ), under large stone blocks on a sandy bottom, 0–0.5 m, 31.XII.1985 .

10.— 5 males (1ov.), 6 fem. (3 gravid), 16 juv. ( SMF 1559), algae on rock, lower mesolittoral, 7.V.1985. 2 juv. ( SMF 1560), same locality, 8.V.1985. 1 male (ov.), 3 fem. (2 gravid), 8 juv. ( SMF 1561), 10.V.1985. 1 male, 1 fem. (gravid), 6 juv. ( SMF 1562), phaeophyceans on rock, lower mesolittoral, 12.V.1985. 2 males (ov.), 3 fem. (2 gravid), 4 juv. ( SMF 1563), Sargassum growing on rock, mesolittoral, 3.VII.1985. 5 juv. ( SMF 1564), with Digenia and Sargassum on rock, mesolittoral, 31.IX.1985.

15.— 2 fem. (gravid) ( SMF 1565 About SMF ), from phaeophyceans, 5–7 m, 22.V.1985 .

16.— 55 males (3ov.), 67 fem. (39 gravid), 23 juv. ( SMF 1566 About SMF ), phaeophyceans on rock, mesolittoral, 22.V.1985 . 8 males (1 ov.), 5 fem. (4 gravid), 1 juv. ( INVEMAR), phaeo- and rhodophyceans on rock, mesolittoral, 15.VII.1985 . 1 male ( ZSM), phaeophyceans on rock, lower mesolittoral, 12.II.1986 .

17.— 3 males, 8 fem. (6 gravid) ( ZMA 3354 View Materials ), from Cnidoscyphus on rock, mesolittoral, 8.VII.1985 . 2 fem. (gravid) ( SMF 1567 About SMF ), same locality, 15.VII.1985 . 1 fem., 3 juv. ( SMF 1568 About SMF ), under blocks of rock, 0–0.5 m, 7.I.1986 .

18.— 1 fem. ( SMF 1569 About SMF ), from Halocordyle on rock, ca. 1 m, 23.VI.1985 .

19.— 1 male, 2 fem. (gravid) ( ZSM), Thalassia , 5 l of substratum, 0.5–4 m, 27.VI.1985 . 1 male ( SMF 1570 About SMF ), same locality, 8.VIII.1985 . 2 males ( SMF 1571 About SMF ), same locality, 7.XII.1985 . 3 males (1 ov.), 4 fem. (2 gravid) ( ZFMK), same locality, 12.II.1986 . 1 fem. (gravid) ( SMF 1572 About SMF ), same locality, 3.III.1986 . 8 males (3 ov.), 3 fem. (gravid), 2 juv. ( SMF 1573 About SMF ), same locality, 2.V.1986 .

20.— 17 males (3 ov.), 15 fem. (14 gravid), 3 juv. ( SMF 1574 About SMF ), Sargassum cymosum on rock, 5l of substratum, 0–0.5 m, 7.VI.1985 . 2 males, 3 fem. (gravid) ( USNM), same locality, 9.IX.1985 . 2 males, 2 fem. (gravid) ( SMF 1575 About SMF ), same locality, 2.X.1985 . 1 fem. (gravid) ( SMF 1576 About SMF ), same locality, 8.XI.1985 . 2 males (1 gravid) ( SMF 1577 About SMF ), same locality, 7.XII.1985 . 3 males, 2 fem. (gravid) ( SMF 1578 About SMF ), same locality, 7.I.1986 . 3 males ( SMF 1579 About SMF ), same locality, 3.III.1986 . 1 male (ov.) ( SMF 1580 About SMF ), same locality, 3.IV. 1986 . 1 male ( SMF 1581 About SMF ), same locality, 2.V.1986 .

21.— 17 males (7 ov.), 14 fem. (11 gravid), 3 juv. ( SMF 1582 About SMF ), Digenia simplex on rock, 5 l of substratum, mesolittoral, 7.VI.1985 . 1 juv. ( SMF 1583 About SMF ), same locality, 5.VII.1985 . 11 males (2 ov.), 8 fem. (2 gravid), 1 juv. ( SMF 1584 About SMF ), same locality, 8.VII.1985 . 11 males (3 ov.), 7 fem. (gravid), 8 juv. ( SMF 1585 About SMF ), same locality, 13.VIII.1985 . 1 male, 2 fem. (gravid), 5 juv. ( SMF 1586 About SMF ), same locality, 9.IX.1985 . 1 male, 1 fem. (gravid) ( SMF 1587 About SMF ), same locality, 2.X.1985 . 8 males (3 ov.), 9 fem. (gravid), 15 juv. ( SMF 1588 About SMF ), same locality, 8.XI.1985 . 1 male, 4 fem. (2 gravid), 13 juv. ( SMF 1589 About SMF ), same locality, 12.II.1986 . 2 juv. ( SMF 1590 About SMF ), same locality, 3.IV.1986 . 2 juv. ( SMF 1591 About SMF ), same locality, 2.V.1986 .

22.— 19 males (8 ov.), 11 fem. (5 gravid), 15 juv. ( SMF 1592 About SMF ), reef surface from Halimeda , mesolitoral, 14.IV.1986 .

23.— 1 male ( SMF 1593 About SMF ), drifting Sargassum over sandy bottom, 7–9 m, 31.V.1985 .

24.— 1 male ( SMF 1594 About SMF ), Thalassia with corallinaceans, 2 m, 4.IX.1985 . 1 fem. (gravid) ( SMF 1595 About SMF ), Thalassia , 1 m, 4.IX.1985 . 1 male ( SMF 1596 About SMF ), same locality, 0.5–1 m, 8.IX.1985 . 7 males (2 ov.), 4 fem. (gravid), 1 juv. ( SMF 1597 About SMF ), Thalassia with corallinaceans, 1 m, 21.I.1986 .

27.— 2 males (1 ov.), 1 fem. (gravid), 2 juv. ( SMF 1598 About SMF ), coral rubble in a stand of Thalassia , 0.5 m, 13.IX.1985 .

28.— 1 male, 3 fem. (gravid), 4 juv. ( SMF 1559 About SMF ), under stones in about 0.5 m, 4.IV.1986 .

31.— 1 fem. (gravid), 1 juv. ( SMF 1600 About SMF ), from phaeophyceans and rhodophyceans on rock, mesolittoral, 9.IV. 1986 .

33.— 1 fem. (gravid) ( SMF 1601 About SMF ), Thalassia , 0.5 m, 17.I.1986 .

34.— 2 males (ov.), 5 fem. (1gravid), 3 juv. ( SMF 1602 About SMF ), under stones in about. 0.5 m, 10.IV.1986 .

38.— 12 males (4 ov.), 6 fem. (3 gravid), 8 juv. ( SMF 1603 About SMF ), Thalassia , 0.5 m, 17.III.1986 .

39.— 9 males (4 ov.), 7 fem. (gravid), 4 juv. ( SMF 1604 About SMF ), from stones, 0–0.5 m, 17.III.1986 . 11 males (6 ov.), 4 fem. (gravid), 4 juv. ( SMF 1605 About SMF ), same locality, 14.IV.1986 .

45.— 3 males, 1 fem. ( SMF 1606 About SMF ), from algae, hydroids and bryozoans on rock, 6–10 m, 26.IX.1985 .

Description of male: Trunk outline almost circular, all segments fused; crurigers touching or slightly separated. Cephalon bearing low tubercle above origin of palps, terminating in one short seta.

Ocular process about as high as its basal diameter, distally rounded, eyes distinctly pigmented. Crurigers 1–4 often with low setaceous tubercle close to dorso-distal margin. Abdomen feebly bent dorsally, distally narrower and adorned with some setae; abdomen overreaching 4 th crurigers by more than half of its length. Proboscis very slender, broadest in basal half. Scape of cheliphores about 2.5 times as long as diameter, dorsodistally with some regularly spaced short setae. Cheliphores mere stumps, with short lateral seta. Palps with 8 articles; 2 nd and 4 th articles longest, about three times as long as broad; articles 6–8 with several ventral or distal setae. Oviger of 10 articles; 4 th and 5 th the longest, slender; articles 8–10 with pairs of serrated flattened setae. Legs relatively robust; coxae 1 of all legs with robust dorsal tubercle and additional tubercle on their antero-lateral and postero-lateral aspects, which may be somewhat variable; coxa 2 of all legs distally adorned with small antero- and postero-lateral tubercles bearing some setae; coxa 3 of all legs without tubercles; cement gland opening via dorso-distal cone-shaped process of the femur, ending in very short tube-shaped duct; tibia 1 and tibia 2 of about same length, with several long setae and some slender dorsal spiniform setae; tarsus slightly longer than broad, with 3 short ventral setae; propodus feebly curved, without heel; sole with 6–8 short stiff setae; main claw relatively short and robust, about 1/3 as long as propodus; auxiliary claws about 4/5 as long as main claw.

Measurements: Length 0.41; width 0.43 (across 2 nd crurigers); length of abdomen 0.14; length of proboscis 0.44; length of cheliphores 0.11; leg 3: coxa1, 0.11; coxa 2, 0.11; coxa 3, 0.10; femur 0.31; tibia 1, 0.26; tibia 2, 0.31; tarsus 0.04; propodus 0.24; main claw 0.08; auxiliary claw 0.07.

Female: generally similar to males, with the following differences: coxae 1 of all legs distally with 2 small tubercles only which bear setae; dorso-distal tubercles on coxae 2 of all legs less developed. Ovigers shorter, 7 th article shorter than in males; specialized spines on articles 5–10.

Remarks: The development of tubercles on trunk segments and on coxae 1–2 of all legs is very variable in both sexes, as in many species of this difficult genus, which badly needs a revision.

Achelia sawayai colonizes a variety of substrata and seems to be restricted to shallow water (in our research area 0–10 m). Most specimens came from stands of algae and seagrass in the upper sublittoral from 0– 2 m. Ovigerous males were sampled all year round, eurychronous.

Distribution: Since the original description from Brazil the species has been collected in great numbers; it may be regarded as one of the most frequent species in the tropical western Atlantic. Some occasional findings outside that region were recorded from western Africa (Fage 1949a: 28), Madagascar (Stock 1974: 14), the isles of Fiji ( Müller 1990b: 105) and the Society Archipelago (Moorea, Müller 1989: 124; Bora Bora, Müller 1990a: 186).

SMF

Forschungsinstitut und Natur-Museum Senckenberg

INVEMAR

Instituto de Investigaciones Marinas de Punta de Betin

ZSM

Bavarian State Collection of Zoology

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Pycnogonida

Order

Pantopoda

Family

Ammotheidae

Genus

Achelia

Loc

Achelia sawayai Marcus, 1940

Müller, Hans-Georg & Krapp, Franz 2009
2009
Loc

Achelia sawayai:

Muller, H. - G. 1992: 43
Stock, J. H. 1990: 205
Muller, H. - G. 1989: 123
Stock, J. H. 1989: 87
Stock, J. H. 1986: 400
Child, C. A. 1979: 1
Stock, J. H. 1979: 9
1979
Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF