Parabopyrella mortenseni

Romero Rodríguez, Jesús & Álvarez, Fernando, 2021, New hosts and distribution records for bopyrid isopods parasitising alpheid shrimps (Decapoda, Alpheidae) in the SW Gulf of Mexico and Mexican Caribbean, Journal of Natural History 54 (35 - 36), pp. 2219-2248 : 2234-2236

Parabopyrella mortenseni (Nierstraz and Brender à Brandis, 1929)

Figures 1 (d), 7; Table 1

Bopyrella mortenseni Nierstrasz and Brender à Brandis, 1929: 30 , 31, figs. 34–37 [type locality: St. Thomas , Virgin Islands, parasitising Lysmata wurdemanni ] . – Chopra, 1930: 137–138. – Shiino, 1933: 282. – Danforth, 1963: 7. – Chace 1970: 60 [ Bahía de Turiamo , Estado de Aragua, Venezuela, parasitising L. rathbunae ] . – Danforth, 1970: 9, 43, 60, 61, 151, fig. 7c-d. – Markham, 1974: 193–195, 316, 322. – Bourdon, 1980: 187 in key, 218–221, 224–225, fig. 15, table 4 [re-examination of types]. – Bourdon, 1981: 1144. – Markham, 1982: 345. – Markham, 2009: 227. – Markham, 2010: 160.- An et al. 2015: 47.

Bopyrella Mortenseni. – Monod, 1933: 235.

not Bopyrella Mortensni [sic]. – Qazi, 1959: 60, 61, figs. 7, 8.

Probopyrus sp. – Van Arman and Smith, 1970: 133–135, figs. 1, 2 [Biscayne Bay, Florida, U.S. A., parasitising L. wurdemanni (cited as Hippolysmata wurdemanni )]. – Anderson, 1977: 248. – Bursey, 1978: 569.

‘branchial bopyrids’. – Chace, 1972: 73 [ Antigua Island, parasitising Alpheus viridari ].

Parabopyrella mortenseni . – Markham, 1985: 73–78, figs. 32–35. – Markham, 1988: 57 table 1. – Kensley and Schotte, 1989: 112 table 2. – Markham and Donath-Hernández, 1990: 243. – Camp et al. 1998: 133 table 2. – Román-Contreras and Martínez-Mayén, 2011 [Laguna de Términos, Campeche, Mexico, parasitising A. viridari ]: 1145–1148, 1150. – Kazmi and Yousuf, 2013: 131. – An et al. 2015: 48, 59, 61 in key. – Romero-Rodríguez and Martínez-Mayén, 2018: 1183–1184. – Ribeiro et al. 2019: 2440.

Parabopyrella mortensi [sic]. – Boyko, 2006: 41–43.

Material examined

One juvenile female, one male ( CNCR 34975 ) parasitising one female of Alpheus normanni ( CNCR 7584 ), P . Flores det. host; Champotón , Campeche, Mexico (19º29 ʹ 52.30”N, 90º42 ʹ 15.6”W); J . L . Villalobos coll.; 20 January 1987. One juvenile female ( CNCR 35023 ) parasitising one ovigerous female of Alpheus cristulifrons Rathbun, 1900 ( CNCR 20339 ), M . Camacho det . host; Mahahual , Quintana Roo, Mexico (18º42 ʹ 54.70”N, 87º42 ʹ 24.4”W); D . Domínguez coll .; 9 March 1996.

Distribution

Southern Florida, U.S.A., US Virgin Islands to Venezuela ( Markham 1985).

Remarks

The examined female, paired with a male (CNCR 34975), was considered juvenile because it has a nearly symmetrical body ( Figure 1 (e)) and the five pairs oostegites were not fully developed; nevertheless, it agrees with most of the criteria proposed for P. mortenseni ( Nierstrasz and Brender à Brandis, 1929; Bourdon 1980, both as Bopyrella mortenseni ; Markham 1985). The slightly sinuous inner ridge observed on their first pair of oostegites ( Figure 7 (a)) agrees with that reported for another juvenile female of this species ( Markham 1985). Some structures of the lone juvenile female (CNCR 35023) are much less developed, e.g. the oostegites are a tiny triangular-shaped plate closely to the pereopods and the barbula has a small bulge on each corner. Other features matched well with those reported for P. mortenseni : the head fused medially with the first pereomere but separated by anterolateral notches ( Figure 7 (b)), the antennules and antennae composed of three and two segments each, respectively, both tipped by setae ( Figure 7 (c)), the maxillipeds with a conspicuous setose palp on its anterior margin ( Figure 7 (d)) similar to that illustrated by Bourdon (1980, Figure 15(b)) and Markham (1985, Figure 32(e)). Some variations include pereopods with rounded projection on their basis not so broad and the pleomeres are clearly distinct though they are not separated by lateral notches ( Figure 7 (b)), as was noted by Markham (1985) for a juvenile female of P. mortenseni . The pleotelson of this juvenile female is longer than wide and with the posterior margin entire and rounded ( Figure 7 (b)) and the first three pairs of pleopods are semicircular shaped and biramous but the posterior ones are reduced to a tiny branch.

The male ( Figure 2 (d)) attached to the juvenile female (CNCR 34975) also fits well the description of P. mortenseni . In general, it resembles the male illustrated by Markham (1985, Figure 35) with pereopods of similar sizes but on the first three pairs, the dactylus is stouter and acute than in posterior ones. The pleon is fused into a single piece, wider than the last pereomere, with slight ventrolateral trace of segmentation, with the posterior margin almost straight, and lacking setae ( Figure 2 (d)).

The juvenile female and male were in the right branchial chamber of a female A. normanni of 5.00 mm CL; whereas the single juvenile female was in the right branchial chamber of an ovigerous females A. cristulifrons of 3.64 mm CL, carrying 14 embryos at an early stage with a mean length of 0.48 ± 0.01 and width of 0.46 ± 0.01 mm, and a mean volume of 0.05 ± 0.004 mm 3. The measurements of the females and male of P. mortenseni are shown in Table 1.

Throughout its range of distribution, P. mortenseni was known to parasitise only shrimps of the family Lysmatidae such as Lysmata rathbunae Chace, 1970 and L. wurdemanni ( Gibbes, 1850) ( Markham 1985; Kensley and Schotte 1989). Later it was found in the Gulf of Mexico and Mexican Caribbean parasitising the alpheid Alpheus viridari ( Armstrong, 1949) ( Román-Contreras and Martínez-Mayén, 2011) , and it is herein reported from A. cristulifrons , recognised for the first time as host to a bopyrid, and A. normanni . Boyko (2006) recognised as accidental the association of P. lata and L. boggesi and noted the absence of records of Parabopyrella parasitising shrimps of two different families, which is now the case.

Figures

Figure 1. Bopyrid females parasitising Alpheus and Synalpheus shrimps at the SW Gulf of Mexico and Mexican Caribbean. a) Bopyrella harmopleon Bowman, 1956, YUC-CC-255-11-006553; b) Bopyrione synalphei Bourdon and Markham, 1980, YUC-CC-255-11-006555; c) Capitetragonia alphei (Richardson, 1900), CNCR 34973; d) Parabopyrella lata (Nierstraz and Brender à Brandis, 1929), CNCR 34974; e) Parabopyrella mortenseni (Nierstraz and Brender à Brandis, 1929), CNCR 34975; f) Eophrixus subcaudalis (Hay, 1917), CNCR 5254. Scale bar = 1.0 mm.

Figure 2. Bopyrid males parasitising Alpheus and Synalpheus shrimps at the SW Gulf of Mexico and Mexican Caribbean. a) Bopyrella harmopleon Bowman, 1956, YUC-CC-255-11-006553; b) Bopyrione synalphei Bourdon and Markham, 1980, YUC-CC-255-11-006556; c) Capitetragonia alphei (Richardson, 1900), CNCR 34973; d) Parabopyrella mortenseni (Nierstraz and Brender à Brandis, 1929), CNCR 34975; e) Eophrixus subcaudalis (Hay, 1917), CNCR 5254. Scale bar = 0.5 mm in a-b; 1.0 mm in c-e.

Figure 7. Parabopyrella mortenseni (Nierstraz and Brender à Brandis, 1929). a) first oostegite of juvenile female (CNCR 34975) parasitising Alpheus normanni, internal view; b) juvenile female (CNCR 35023) parasitising A. cristulifrons, dorsal view; c) antenna and antennule of female CNCR 35023; d) maxilliped of female CNCR 35023. Scale bar = 0.5 mm in a; 1.0 mm in b; 0.2 mm in c-d.