Pycnogonum cf. pusillum Dohrn, 1881

Sabroux, Romain, Hassanin, Alexandre & Corbari, Laure, 2022, Sea spiders (Arthropoda: Pycnogonida) collected during the Madibenthos Expedition from Martinique shallow waters, European Journal of Taxonomy 851 (1), pp. 1-141 : 110-113

publication ID	https://doi.org/10.5852/ejt.2022.851.1999
publication LSID	lsid:zoobank.org:pub:7317EA8C-7C05-4E24-A38C-30F860013694
DOI	https://doi.org/10.5281/zenodo.7517189
persistent identifier	https://treatment.plazi.org/id/03A95E06-3E73-FFC0-FDCC-079E0064BA3D
treatment provided by	Felipe (2022-12-12 12:07:49, last updated 2024-12-02 13:56:48)
scientific name	Pycnogonum cf. pusillum Dohrn, 1881
status

Treatment

Pycnogonum cf. pusillum Dohrn, 1881 View in CoL

Fig. 30 View Fig

Pycnogonum pusillum Dohrn, 1881: 207 View in CoL , pl. 16 figs 4–8.

Pycnogonum pusillum View in CoL – Carus 1885: 288. — D’Arcy Thompson 1909: 540. — Bouvier 1922: 115; 1923a: 61. — Schimkewitsch 1929: 6–7, 18. — Helfer & Schlottke 1935: 298. — Stock 1952: 1–6, fig. 1a–b; 1964: 32; 1968b: 36, fig. 30. — Barnard 1954: 155–156, fig. 33. — Bourdillon 1954b: 155. — Hoenigman & Stock 1955: 534. — Monniot 1962: 273. — Krapp 1983: 412–413. — Arnaud 1987: 51. — Munilla 1993: tab. 4. — Piscitelli & Barone 2000: tab. 1. — Chimenz Gusso & Lattanzi 2003: tab. 1. — Dunlop et al. 2007: 59, fig. 45. — Lehmann et al. 2014: 165 View Cited Treatment (list), 168, figs 53, 55. — Soler-Membrives & Munilla 2015: tab. 2. — Colasanto & Galli 2021: tab. 1.

Pycnogonum (Retroviger) pusillum View in CoL – Stock 1990: 232.

Pycnogonum cf. pusillum View in CoL – Sabroux et al. 2019b: 1525, tab. 1.

nec Pycnogonum littorale (Strøm, 1762) View in CoL – Zavodnik 1968: 46, 49.

Type material

Pycnogonum pusillum Dohrn, 1881 . Syntypes (?) (see Dunlop et al. 2007): ZMB _Pyc_52 (not examined). Type locality: Naples Bay, Italy.

Material examined

MARTINIQUE • 1 ♀; Passe du Brigot; 14°33.8ʹ N, 60°47.6ʹ W; depth 17 m; 16 Sep. 2016; st. AB183; MNHN-IU-2016-815 GoogleMaps • 1 ♀; Le Vauclin; 14°30.5ʹ N, 60°48.5ʹ W; depth 2 m; 10 Oct. 2016; st. AB419; MNHN-IU-2016-860. GoogleMaps

Remarks

The Martinique specimens resemble the original illustration in Dohrn (1881) by their body shape, the conical proboscis being distally truncated and the relative sizes of the legs articles and main propodal claws; they similarly present the same tubercles on the lateral processes and first coxae as represented by Stock (1952), also illustrated by Lehmann et al. (2014) and Munilla & Soler-Membrives (2014). Unlike in Stock (1952), however, the specimens have a tubercle posterior to the ocular tubercle that is barely visible in dorsal view, and the auxiliary claws are longer (about half as long as the main claw). Since there is no available molecular data for comparison, we regard these two females as belonging to Dohrn’s species for now.

The specimens are also morphologically very close to the Australian species Pycnogonum carinatum Staples, 2002 , from which they chiefly differ by the presence of auxiliary claws in the Martinique material, as well as by the more granulous dorsal surface of the legs and the cleft spines on the propodal sole in the type material P. carinatum ( Staples 2002) .

Distribution

Pycnogonum pusillum is known from the Western Mediterranean (Balearic Sea, Adriatic Sea, Thyrrenian Sea, Ionian Sicily), and the Eastern Atlantic ( Morocco, Angola, South Africa, Cap Verde).

Depth range

Pycnogonum pusillum was recorded from 0.5 to 1200 m. The present material was sampled at 2 and 17 m.

References

Barnard K. H. 1954. South African Pycnogonida. Annals of the South African Museum 41 (3): 81 - 158.

Bourdillon A. 1954 b. Les pycnogonides de Marseille et ses environs. Recueil des Travaux de la Station marine d'Endoume 12 (7): 145 - 158.

Bouvier E. L. 1922. Classification et caracteres distinctifs essentiels des pycnogonides appartenants a la serie des pycnogonomorphes. Annales des Sciences naturelles (Zoologie) (Series 10) 5 (1 - 2): 113 - 117. https: // doi. org / 10.1080 / 037454809495152

Bouvier E. L. 1923 a. Pycnogonides. Faune de France 7: 1 - 70.

Carus J. V. 1885. Pantopoda. In: Prodromus Faunae Mediterraneae sive Descriptio Animallum Maris Mediterranei Incolarum 1: 283 - 288. E. Schweizerbart'sche Verlagshandlung, Stuttgart. Available from https: // www. biodiversitylibrary. org / page / 12560730 [accessed 3 Oct. 2022].

Chimenz Gusso C. & Lattanzi L. 2003. Mediterranean Pycnogonida: faunistic, taxonomical and zoogeographical considerations. Biogeographia - The Journal of Integrative Biogeography 24: 251 - 262. https: // doi. org / 10.21426 / b 6110015

Colasanto E. & Galli L. 2021. The pycnogonids (Arthropoda, Pycnogonida) of Torrevaldaliga (Tyrrhenian Sea), Italy, with data on Endeis biseriata, new record for the Mediterranean Sea. The European Zoological Journal 88 (1): 622 - 631. https: // doi. org / 10.1080 / 24750263.2021.1910741

D'Arcy Thompson W. 1909. Pycnogonida. In: Harmer S. F. & Shipley B. E. (eds) The Cambridge Natural History 4: 501 - 542. Macmillan & Co., London. Available from https: // www. biodiversitylibrary. org / page / 38507875 [accessed 3 Oct. 2022].

Dohrn A. 1881. Die Pantopoden des Golfes von Neapel und der angrenzenden Meeresabschnitte. Monographie der Fauna und Flora des Golfes von Neapel 3: 1 - 252.

Dunlop J. A., Friederichs A., Krapp F. & Ring C. 2007. An annotated catalogue of the sea spiders (Pycnogonida, Pantopoda) held in the Museum fur Naturkunde der Humboldt-Universitat zu Berlin. Mitteilungen aus dem Museum fur Naturkunde in Berlin, zoologische Reihe 83 (1): 43 - 74. https: // doi. org / 10.1002 / mmnz. 200600017

Helfer H. & Schlottke E. 1935. Pantopoda. Dr. H. G. Bronn's Klassen und Ordnungen des Tierreichs 5 (4 (2 )): 1 - 314.

Hoenigman J. & Stock J. H. 1955. Das mannliche Geschlecht von Pycnogonum pusillum Dohrn, 1881 (Pantopoda). Entomologische Berichten, Amsterdam 15 (24): 534 - 536.

Krapp F. 1983. Pantopoden aus Nordwestafrika (Pycnogonida). Bonner zoologische Beitrage 34 (1 - 3): 405 - 416.

Lehmann T., Hess M. & Melzer R. 2014. Common littoral pycnogonids of the Mediterranean Sea. Zoosystematics and Evolution 90 (2): 163 - 224. https: // doi. org / 10.3897 / zse. 90.7520

Monniot C. 1962. Recherches sur les graviers a Amphioxus de la region de Banyuls-sur-Mer. Vie et Milieu 13 (2): 231 - 322.

Munilla T. L. 1993. Contribucion a la picnogonofauna del Mediterraneo espanol. Annali del Museo civico di Storia naturale Giacomo Doria 89: 445 - 455.

Munilla T. L. & Soler-Membrives A. 2014. Pycnogonida. Fauna Iberica 39: 1 - 292.

Piscitelli G. & Barone G. 2000. Prima nota sui picnogonidi delle isole Tremiti. Biologia Marina Mediterranea 7 (2): 718 - 722.

Sabroux R., Hassanin A. & Corbari L. 2019 b. Four times more species of sea spiders (Arthropoda: Pycnogonida) in Martinique Island (Lesser Antilles). Marine Biodiversity 49 (3): 1519 - 1535. https: // doi. org / 10.1007 / s 12526 - 019 - 00957 - 9

Schimkewitsch W. 1929. Pycnogonida (Pantopoda) (part 1). In: Fauna SSSR, Izdateljstvo Akademii Nauk SSSR: i - cxv, 1 - 224. [In Russian and Latin.]

Soler-Membrives A. & Munilla T. 2015. PYCNOIB: biodiversity and biogeography of Iberian pycnogonids. PLoS One 10 (3): e 120818. https: // doi. org / 10.1371 / journal. pone. 0120818

Staples D. A. 2002. Pycnogonum (Pycnogonida: Pycnogonidae) from Australia with descriptions of two new species. Memoirs of Museum Victoria 59 (2): 541 - 553. https: // doi. org / 10.24199 / j. mmv. 2002.59.12

Stock J. H. 1952. Pycnogonum pusillum Dohrn, 1881: retrouve apres 70 annees sur la cote africaine. Bulletin de l'Institut royal des Sciences naturelles de Belgique 28 (14): 1 - 6.

Stock J. H. 1990. Macaronesian Pycnogonida. CANCAP-project contribution no. 78. Zoologische Mededelingen 63 (16): 205 - 233.

Zavodnik D. 1968. Beitrag zur Kenntnis der Asselspinnen (Pantopoda) der Umgebung von Rovinj (Nordl. Adria). Thalassia Jugoslavica 4: 45 - 53.

Figures

Fig. 30. Pycnogonum cf. pusillum Dohrn, 1881, ♀, MNHN-IU-2016-815. A. Body, dorsal view. B. Body, lateral view (same scale as A). C. Third leg. D. Tarsus and propodus of third leg.