Neonesidea manningi Maddocks, 1975

Maddocks, Rosalie F., 2021, Taxonomic applications of the esophageal flapper valve in the Genus Neonesidea (Bairdioidea, Podocopida, Ostracoda), including descriptions of new and poorly known species from the Caribbean and Gulf of Mexico, Zootaxa 4903 (4), pp. 451-492 : 479

Neonesidea manningi Maddocks, 1975

Figure 13 A–F, Figure 14 A–M, 15A–D)

1975 Neonesidea manningi sp nov, Maddocks: 53, Figs. 1–3 , Pl. 1, figs. 1–6.

Material: The species was described from a collection of 104 specimens in alcohol ( USNM 142391–142392 , 142402 , 142404–142406 ) .

Dimensions: Maddocks (1975) reported the following dimensions for the male holotype specimen (896M): LVL 0.650 mm, LVH 0.350 mm, RVL 0.650 mm, RVH 0.320 mm .

Supplemental Description: The plate is relatively short and broad, with nearly straight sides, deep scroll-like indentations and a flaring, subpyramidal bracket. The posterior margin carries about 6 broad, bluntly terminated teeth, which are nearly equal in width. A broad gap intervenes between these terminal teeth and the bluntly rounded corner teeth.

Remarks: This is one of the smallest species of the genus. We may speculate that small size facilitates clinging to algae on current-swept, rocky coasts of small, isolated volcanic islands. The species reported as N. tenera from St. Peter and Paul Rocks, Brazil by Antonietto et al. (2012) is similar but larger.

Distribution: Known only from Ascension Island.

Figures

FIGURE 1. A–F, Neonesidea bacata Maddocks, specimen 3912M; G–L, Neonesidea edentulata Maddocks, 3958M; M–R, Neonesidea holdeni Maddocks, specimen 3908M. A–B, RV and LV exteriors in TL; C, A2 claw; D, DV of both hemipenes; E–F, DV of EV with ring, plate, bracket and braces; G–H, right and left exteriors of whole animal before dissection; I, A2 claw; J, DV of both hemipenes; K–L, VV of plate; M, both hemipenes; N–O, RV and LV exteriors in TL; P, A2 claw; Q–R, VV of EV with ring, bracket, plate and marginal teeth. Scale bar = 50 µm.

FIGURE 2. Neonesidea caraionae n. sp. A–K, holotype male specimen 1028M; L–T, paratype male specimen 1029M. A–B, RV and LV exteriors in TL; C–D, hemipenes; E, setulose terminal lobe of hemipenis; F, bifurcate tip of copulatory tube; G, A2 claw; H, VV of plate and bracket; I, posteroventral flange and sensilla of RV; J, posteroventral denticles and terminal spine of LV; K–L, RV and LV exteriors in RL; M, posteroventral marginal denticles and sensilla of LV; N–O, RV and LV exteriors in TL; P, AMS and NPC of LV; Q–T, EV and plate at high and low focus, and details of marginal teeth. Scale bar = 50 µm.

FIGURE 3. Neonesidea credibilis n. sp.; A–H, holotype specimen 500M from Anton Bruun station 412C; I–N, subfossil specimens from Nosy Be: I, 4064RV, J, N, 4062LV; K–M, 4063LV. Neonesidea schulzi (Hartmann), O–Q, specimen 458F from Admirante Island.A, RV exterior in TL; B, DV of EV with ring, plate and bracket; C, DV of plate; D, A2 claw; E, right hemipenis; F, both hemipenes and fragmentary furcae; G–H, AMS and NPC of RV at high and low focus; I–L, RV and LV exteriors in TL; M–N, AMS and NPC of RV and LV; O, DV of EV with ring, plate and bracket; P, plumose sensilla of posterior margin of LV; Q, LV exterior in TL. Scale bar = 50 µm.

FIGURE 13. A–F, Neonesidea manningi Maddocks; A, specimen 895M; B–C, specimen 903F; D–E, specimen 900M; F, specimen 906J; all from Ascension Island. G–I, Neonesidea plumulosa Maddocks, holotype specimen 3960M, from French Frigate Shoal, the Hawaiian Islands. J–M, Neonesidea tenera (Brady); J, specimen 3906M; K, specimen 3892F; L, specimen 3905F; M, specimen 3957J; all from French Frigate Shoal, the Hawaiian Islands. A–B, antennal claws; C–G, I, L, EV with ring, plate, bracket, braces, and details of posterior teeth of plate; H, right lateral view of carapace in RL; M, left lateral view of soft body within decalcified RV. Scale bar = 50 µm.

FIGURE 14. Neonesidea manningi Maddocks. A–F, holotype male 896M; G–J, specimen 902F; K, specimen 956M; L, unnumbered male specimen; M, specimen 957M. A, A2 claw; B, lateral view of compressed head capsule, with EV and chitinous struts; C, both hemipenes; D–E, RV and LV exteriors in TL; F, AMS of RV; G–H, RV and LV exteriors in TL; I, lateral view of compressed anterior body, with head capsule, labrum, EV, and two food balls; J, genital lobe; K, dorsal view of carapace in RL; L, left lateral view of entire animal in TL; M, plate. Scale bar = 50 µm.