Duplominona macrodon Curini-Galletti, 2020

Curini-Galletti, Marco, Carcupino, Marcella, Stocchino, Giacinta A., Leasi, Francesca & Norenburg, Jon L., 2020, New species of Duplominona Karling, 1966 (Platyhelminthes, Proseriata) from the Pacific coast of Panama, Zootaxa 4881 (3), pp. 482-498 : 493-494

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https://doi.org/ 10.11646/zootaxa.4881.3.3

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scientific name

Duplominona macrodon Curini-Galletti

sp. nov.

Duplominona macrodon Curini-Galletti n. sp.

( Fig. 9 View FIGURE 9 )

Holotype. Gulf of Panama: Iguana Island (Lat. 7°37’43.29”N; Lon. 80°0’0.32”W), at a depth of about 5 m, in medium coarse sand, march 2016, one whole mount ( USNM 16225600 View Materials ). GoogleMaps

Other material. Same data as holotype, one specimen observed alive, and prepared as semi-permanent mount ( Fig. 9 H View FIGURE 9 ).

Etymology. The specific epithet refers to the large size of the spines of the copulatory organ of the new species.

Description. A medium-sized, stout Duplominona , about 2 mm long. Cephalic end with oily dots, and rodshaped rhabdoids. Caudal end pointed. Pharynx just behind midbody ( Fig. 9 A, E View FIGURE 9 ).

Male genital system. With about 16 testes in two parallel rows. Copulatory organ ovoid, lined by a very thin muscular layer. Cirrus small, formed by a single girdle of few (13–15) large to very large spines, 8–18 μm long. Spines vary in shape from triangular to almost needle-like ( Fig. 9 C, D, F, H View FIGURE 9 ). Accessory organ ovoid, 32–35 μm across, with a small stylet about 12 μm long. Accessory organ pore very close to female pore.

Female genital system. Ovaria and vitellaria as in previous species. With a spherical bursa, close to the copulatory organ, and provided with a large vaginal pore ( Fig. 9 B, G View FIGURE 9 : v).

Diagnosis. Species of Duplominona with a single girdle of large spines, 8–18 μm long, triangular to needleshaped.

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