Parabetaeus hummelincki ( Schmitt, 1936 )

Anker, Arthur, 2007, New species and records of alpheid shrimps, genera Salmoneus Holthuis and Parabetaeus Coutière, from the tropical western Atlantic (Decapoda, Caridea), Zootaxa 1653, pp. 21-39: 34-35

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Parabetaeus hummelincki ( Schmitt, 1936 )


Parabetaeus hummelincki ( Schmitt, 1936) 

Fig. 7View FIGURE 7, 8View FIGURE 8 b, c

Alpheopsis hummelincki Schmitt, 1936: 364  .

Neoalpheopsis euryone  – Manning & Chace, 1990: 17.

Neoalpheopsis hummelincki  – Chace, 1972: 78; Rodríguez, 1980: 137. Neoalpheopsis  sp. – Rodríguez, 1986: 176.

Material examined: 1 ovig. female, MNRJAbout MNRJ 20217, Brazil, Atol das Rocas  , near Barretão, in tide pools and nodules of calcareous algae, coll. P.S. Young, P.C. Paiva and A.A. Aguiar, 27 Aug 2000 [specimen dissected]; 1 ovig. female (with missing chelipeds), USNMAbout USNM 310832, Brazil, off Vitória, Trindade, between Baixa do Sueste and Parcel das Tartarugas, 20 ° 30 ’S, 29 ° 20 ’W, in tide pool, rotenone, depth 1–2 m, collector unknown, 16 Jan 1976; 1 male, holotype of Alpheopsis hummelincki  , USNMAbout USNM 67395, Bonaire, Kralendijk, under sandy coral debris, coll. P. Hummelinck, 6 Nov 1930; 1 female, MNHN-Na 16391, Dominican Republic, Bayahibe, from coral rocks, depth 1–2 m, coll. A. Anker, 2–3 Jan 2005; 1 male, USNMAbout USNM 256789, Ascension Island, McArthur Point, poisoned isolated tide pool, coll. R.B. Manning et al., 15 Jul 1976.

Comparative material: Parabetaeus cf. euryone (De Man, 1910)  : 1 female, USNMAbout USNM 216068, Galapagos, Isla Isabela, Bahía Cartago, R/V Velero III, 13 Feb 1933. Parabetaeus euryone  : 1 female, MNHN-Na 13633, parasitized by rhizocephalan ( Thompsonia  sp.?), Japan, Ryukyu Archipelago, Kerama group, Yakabi-jima, depth 10 m, coll. K. Nomura, 24 Apr 1994; 1 female, QM W- 21828, Hawaii, Oahu, coll. R. Holcom, no further data, det. A. J. Bruce, 26 Oct 1996.

Description: See Schmitt (1936, as Alpheopsis hummelincki  ).

Colour: The young female from the DR ( Fig. 8View FIGURE 8 b) had pale red bands across the abdomen and was generally very similar to the ovigerous female from Bermuda ( Fig. 8View FIGURE 8 c). The obviously larger ovigerous female photographed in situ off St. Vincent had a more intense red banding and bright yellow eggs ( Fig. 8View FIGURE 8 d).

Size: The largest western Atlantic specimen examined is the ovigerous female from AR, with CL 6.9 mm, TL 22.0 mm.

Ecology: Coarse sand, sand/rubble and reef bottoms, from the lower intertidal to probably at least 10 m, under rubble and rocks, occasionally also in empty Strombus  shells ( Rodríguez, 1986). The AR specimen was found in a tide pool, among nodules of calcareous algae, whereas the DR specimen was extracted from a crevice of a coral rock collected at about 1– 2 m.

Behaviour: Parabetaeus  species may carry chelipeds either extended forward ( Fig. 8View FIGURE 8 c), like species of the presumably related genus Alpheopsis Coutière, 1896  , or folded beneath the body ( Fig. 8View FIGURE 8 d).

Type locality: Bonaire, Netherlands Antilles.

Distribution: Western Atlantic: Bermuda (present study), southern Caribbean: Netherlands Antilles ( Schmitt, 1936), Venezuela: Los Roques ( Rodríguez, 1986); St. Vincent; Dominican Republic (present study); Brazil: Atol das Rocas  and Trindade (present study). Central Atlantic: Ascension Island ( Manning & Chace, 1990).

Remarks: Banner and Banner (1985) placed the western Atlantic Alpheopsis hummelincki Schmitt, 1936  (now Parabetaeus hummelincki  ) and the Hawaiian Neoalpheopsis hiatti Banner, 1953  (now Parabetaeus hiatti  ) in synonymy of the presumably pantropical Neoalpheopsis euryone De Man, 1910  (now Parabetaeus euryone  ), originally described from Indonesia. Nomura & Anker (2001) pointed out that the taxonomic status and synonymy of these two nominal species remain questionable. There appears to be some variation in the shape of the frontal margin (orbital spines, rostrum); the proportions of the telson and pereiopods; the development of the posteromedian triangular piece on the telson; the degree of asymmetry of the chelipeds; the dentition on the cheliped fingers; and some other features, all suggesting that there may be more than one variable pantropical species. Therefore, P. hummelincki  and P. hiatti  should be treated as valid species, awaiting a combined morphological/molecular revision of the entire P. e u r y o n e complex.


Museu Nacional/Universidade Federal de Rio de Janeiro


Smithsonian Institution, National Museum of Natural History














Parabetaeus hummelincki ( Schmitt, 1936 )

Anker, Arthur 2007


Neoalpheopsis euryone

Manning 1990: 17


Neoalpheopsis hummelincki

Rodriguez 1986: 176
Rodriguez 1980: 137
Chace 1972: 78


Alpheopsis hummelincki

Schmitt 1936: 364