Hargeria rapax Harger, 1879

Abarca-Ávila, Mónica Mariel, Herrera-Dorantes, María Teresa, Winfield, Ignacio & Ardisson, Pedro-Luis, 2019, Updated checklist and identification key of benthic tanaidaceans (Crustacea Peracarida) of the sublittoral zone of the northern Yucatan Peninsula, Mexico, Zootaxa 4711 (1), pp. 51-76 : 66

Hargeria rapax Harger, 1879

( Fig. 4 F–G)

Examined material. TA: 370 individuals. CNCR 34803 . Tr-Loc : M43- Celestun , Yucatan, Mexico 21°3’53.319’’N 90°14’57.728’’W, two ♂, 7 May 2005, 26 November 2005, 11 March 2006, coll. AV, SP ; Tr-Loc: M51- Santa Clara, Yucatan, Mexico 21°23’41.709’’N 88°53’21.159’’W, 270 ♀, six ♀ o, 39 ♀ m, 15 ♂, 24 juv, 14 man., 20 May 2005, 27 November 2005, 12 March 2006, coll. AV, SP ; collected at depths of 0.8–1.7 m, in coarse sand, medium sand, and fine sand, with Caulerpa , Syringodium , and T. testudinum

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Local distribution. ( Table 1 , Fig. 2 ).

Geographical distribution. Atlantic Ocean: northeastern United States, from Massachusetts to Florida; entire GoM; Caribbean Sea: Caiman Islands, Puerto Morelos Reef National Park and the coast of Quintana Roo.

Recognition characters. Female: antennule with three articles; three flat spines on the maxilliped endite; uropodal exopod with one article smaller than the first article of endopod. Male: cheliped slender with teeth on proximal inner margin in dactylus and fixed finger; post-anal spatulate process present. Uropodal endopod with five articles in both sexes.

Remarks. It is a euryhaline species, with a preference for submerged aquatic vegetation ( H. wrightii , Ruppia maritima Linnaeus , Syringodium filiforme Kützing and T. testudinum ), It can also be associated with algae ( A. fragilissima , Cladophora Kützing , D. obtusata ), sponges ( A. fistularis , I. felix , I. strobilina ) in soft bottoms, mangroves, marshes, encrusting communities, coral rubble, submerged wood, at depths 0 to 20 m. It feeds on diatoms and fine organic particles.

References. Harger (1879); Lang (1973); Kneib (1992); Heard et al. (2004); Suárez-Morales et al. (2004); García-Madrigal et al. (2005); Masterson (2008); Heard & Anderson (2009); Winfield et al. (2013); Jarquín-González et al. (2015); Monroy-Velázquez et al. (2017); Cházaro-Olvera et al. (2018); Jarquín-González & Carrera-Parra (2019).

Figures

FIGURE 2. Diversity, abundance, and distribution of tanaidaceans of the sublittoral zone of the northern Yucatan Peninsula.

FIGURE 4. Tanaidaceans species of the sublittoral zone of the northern Yucatan Peninsula, suborder Tanaidomorpha. (A) Parakonarus juliae ♀; (B) P. juliae ♂; (C) Alloleptochelia longimana ♀; (D) A. longimana ♂; (E) Cacoheterotanais rogerbamberi ♀; (F) Hargeria rapax ♀; (G) H. rapax ♂; (H) Leptochelia forresti ♀; (I) L. forresti ♂; (J) Leptochelia sp. aff. savignyi ♀; (K) L. sp. aff. savignyi ♂; (L) Zeuxo cf. kurilensis ♀; (M) Z. cf. kurilensis ♂.