Argeia pugettensis Dana 1852
- Dataset
- A Review Of Bopyrids (Crustacea: Isopoda: Bopyridae) Parasitic On Caridean Shrimps (Crustacea: Decapoda: Caridea) From China
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Isopoda
- family
- Bopyridae
- genus
- Argeia
- species
- Argeia pugettensis
biology_ecology
HOSTS AND LOCALITIES: Infesting Argis alaskensis (Kingsley, 1883), Argis crassa (Rathbun, 1899), Argis dentata (Rathbun, 1902), Argis lar (Owen, 1839), Argis ovifer (Rathbun, 1902), Crangon affinis De Haan, 1849, Crangon alaskensis Lockington, 1877, Crangon alba Holmes, 1900, Crangon cassiope de Man, 1906, Crangon crangon (Linnaeus, 1758), Crangon dalli Rathbun, 1902, Crangon franciscorum Stimpson, 1856, Crangon franciscorum angustimanus Rathbun, 1902, Crangon hakodatei Rathbun, 1902, Crangon nigromaculata Lockington, 1877, Crangon propinquus Stimpson, 1860, Eualus suckleyi (Stimpson, 1854), Lissocrangon stylirostris (Holmes, 1900), Mesocrangon munitella (Walker, 1898), Metacrangon munita (Dana, 1852), Neocrangon communis Rathbun, 1899, Neocrangon resima (Rathbun, 1902), Neocrangon sagamiensis (Balss, 1913) (Crangonidae), Bering Sea to San Diego, Japan, Korea, China.
description
Infesting Crangon cassiope de Man, 1906. 2 ♀♀, 2 ♂♂ (CIECR 510401), 2 ♀♀, 2 ♂♂ (CIECR 510402), Yantai, Shandong Province, 6 April 1951. DESCRIPTION: (CIECR 007601): Length 8.12 mm, pereon length 4.58 mm, maximal width 6.2 mm, head length 0.94 mm, head width 1.87 mm, distorted 36 ° (fig. 1 A, B). All segments distinct. Head with narrow frontal lamina, anterior edge of head deeply bilobate (fig. 1 A), eyes lacking. Antennule of three articles, antenna of five articles, terminally setose. Maxilliped (fig. 1 C, D) with setose palp, plectron sharp, anterior article two times larger than posterior article. Barbula with two pairs of smooth falcate lateral projections on each side (fig. 1 E). Pereon broadest across third pereomere (fig. 1 A). Coxal plates very reduced, only visible on first three pereomeres of long side. Dorsolateral bosses on first three pereomeres of longer side, and first four pereomeres on shorter side. Tergal projections on longer side extended, tapeing distally to sharp tip. Brood pouch open (fig. 1 B). Oostegite 1 (fig. 1 F, G) with nearly smooth internal ridge, posterolateral point lacking. Posterior pereopods larger than anterior pairs, ischium with enlarged tubercular lobe, dactyli blunt (fig. 1 H, I). Pleon of six pleomeres, first five pleomeres with lateral plates and uniramous pleopods. Sixth pleomere without lateral plates, with uniramous uropods (fig. 1 B). DESCRIPTION: Male (CIECR 007601): Len‐ gth 2.26 mm, maximal width across pereomere 4, 0.71 mm, head width 0.43 mm, head length 0.20 mm, pleonal length 0.55 mm. (fig. 1 K, L). Head elliptical, separated from first pereomere (fig. 1 K). Black eyes near posterior edge of head (fig. 1 K). Antennule of three articles, antenna of four articles, terminally setose (fig. 1 M). Pereomeres distinct, subequal in width, midventral projections lacking (fig. 1 L). Dactyli of first pereopod larger others (fig. 1 N). Pleon fused into single ovate piece, pleopods and uropods lacking; anal cone usually lacking (occasionally present) (fig. 1 O). VARIATIONS: The head of some females is so deeply biobed it looks like a pair of spheres united. One female specimen (CIECR 530401) with an extremely bulging head, very extended, terminally sharp tergal projections (fig. 1 J) and the surface of the lateral plates are crenulated. One male (CIECR 510401) with anal cone on the terminal end of the pleon (fig. 1 O).
discussion
REMARKS: This species has an extremely wide range, occurring in both the northeast and northwest Pacific on at least 23 crangonid hosts. Specimens from Japan, Korea, and China have been well described, but northwestern Pacific specimens are much more poorly known. Richardson (e. g., 1905 b) described the species in some detail, but a fuller redescription, especially of characters now known to be informative at the species level, is needed. An example of a possible difference between northwestern and northeastern Pacific specimens, based on literature review, is that the northwestern specimens appear to have moderate to pronounced bilobation of the head, while northeastern specimens have a nearly flat head in dorsal view (see, e. g., Gifford, 1934). Additionally, given the wide geographic range of the species, a molecular analysis of specimens from both sides of the Pacific should be undertaken to test the possibility of cryptic species. There are three hosts of this species in China and one of these, Crangon cassiope, is the type host for Argeia pingi Yü, 1935, which was only very briefly described, not illustrated, and never reported subsequent to its original description. Markham (1977) thought A. pingi might be a synonym of A. pugettensis. Because this host has now been recollected and is infested with Argeia specimens that do not differ from A. pugettensis as currently defined, A. pingi is here considered a synonym of A. pugettensis. However, if future moleculer and / or morphological analyses show any differences warranting recognition of the northeastern and northwestern populations as distinct species, A. pingi would likely be the valid name for northwestern Pacific specimens, assuming that all northwestern Pacific specimens are conspecific. However, the type specimens of A. pingi appear to be lost and a neotype would be required.
materials_examined
MATERIAL EXAMINED: Infesting Crangon affinis De Haan, 1849. 2 ♀♀, ♂ (CIECR 007601), South Yellow Sea, Stn. 76, 123 ° 30 ′ E, 27 ° 20 ′ N, 45 m, 18 April 1975; 2 ♀♀, 2 ♂♂ (CIECR 020801), South Yellow Sea, Stn. 208, 127 ° 00 ′ E, 30 ° 30 ′ N, 46 m, 12 July 1968; ♀, ♂ (CIECR 104941), Yellow Sea, Stn. 10494, 122 ° 00 ′ E, 35 ° 00 ′ N, 52 m, 13 June 2004; 2 ♀♀, 2 ♂♂ (CIECR 007602), South Yellow Sea, Stn. 76, 123 ° 30 ′ E, 27 ° 20 ′ N, 45 m, 10 June 1975; ♀, ♂ (CIECR 030601), Yellow Sea, Stn. 306, 126 ° 00 ′ E, 29 ° 30 ′ N, 60 m, 13 November 1957; ♀ (CIECR 350801), Yellow Sea, Stn. 3058, 120 ° 00 ′ E, 35 ° 00 ′ N, 81 m, 12 September 1992; ♀, ♂ (CIECR 626301); South China Sea, Stn. 6263, 107 ° 30 ′ E, 19 ° 00 ′ N, 77 m, 8 March 1962; ♀, ♂ (CIECR 008101), South Yellow Sea, Stn. 81, 122 ° 00 ′ E, 27 ° 10 ′ N, 31 m, 8 June 1975; ♀, ♂ (CIECR 005101), South Yellow Sea, Stn. 51, 123 ° 20 ′ E, 28 ° 30 ′ N, 65 m, 18 April, 1975; ♀, ♂ (CIECR 000101), South Yellow Sea, Stn. 1, 121 ° 00 ′ E, 26 ° 30 ′ N, 75 m, 29 April 1976; ♀, ♂ (CIECR 590501), Shazikou, Qingdao, Shandong Province, 16 May 1959, coll. Fenxuan Zhang; 2 ♀♀, 2 ♂♂ (CIECR 580901), South Yellow Sea, Stn. 81, 122 ° 00 ′ E, 27 ° 10 ′ N, 31 m, 20 September 1958; 2 ♀♀, 2 ♂♂ (CIECR 303801), Yellow Sea, Stn. 3038, 123 ° 45 ′ E, 36 ° 00 ′ N, 71.5 m, 10 November 1958. Infesting Crangon crangon (Linnaeus, 1758). 2 ♀♀, 2 ♂♂ (CIECR 530401), Yantai Fish Market, Shandong Province, 20 April 1953; 2 ♀♀, 2 ♂♂ (CIECR 570101), Shazikou, Qingdao, Shandong Province, 20 January 1957, coll. Shaowu Wang, Xiuxi Zhang and Zhengang Fan; ♀, ♂ (CIECR 550401), Yantai, Shandong Province, 5 April 1955, coll. Engze Yang; ♀, ♂ (CIECR 500301), Beidai He, Hebei Province, 5 March 1950.