Neonesidea schulzi ( Hartmann, 1964 )

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 : 483-485

Neonesidea schulzi ( Hartmann, 1964)

( Figure 3 O–Q; 16A–L)

1964 Triebelina schulzi sp nov, Hartmann: 44, Pls. 4, 5, figs. 14–22.

1969 Neonesidea schulzi (Hartmann) .—Maddocks, p. 20.

1969 Neonesidea schulzi (Hartmann) .—Hartmann, p. 248.

1978 Neonesidea schulzi (Hartmann) .—Bonaduce, Masoli & Pugliese, p. 376, Pl. 1, fig. 7.

1980 Neonesidea schulzi (Hartmann) .—Bonaduce et al., p. 144.

1983 Neonesidea schulzi (Hartmann) .—Bonaduce et al., p. 481.

? 1988 Neonesidea schulzi (Hartmann) sensu lato.—Titterton & Whatley, p. 114, Fig. 5 , nos. 5–10, Pl. 2, figs. 1–10 (part).

1995 Neonesidea schulzi (Hartmann) .—Maddocks, p. 202, Figs. 4 A–D, 5A–F, 6A–D.

non 1969 Neonesidea schulzi ifalikensis subsp nov, Maddocks: 22, figs. 43e–m.

non 1970 Neonesidea schulzi (Hartmann) .—Bate, Pl. 1, fig. I, p. 246.

non 1976 Neonesidea schulzi (Hartmann) .—Holden, p. 12, Pl. 7, figs. 9–11.

non 2005 Neonesidea schulzi (Hartmann) .—Mostafawi et al., p. 127, Pl. 1, figs. 2–3.

non 2012 Neonesidea schulzi (Hartmann) .—Munef et al., p. 153, Pl. 1, figs. 4–6.

Material: Numerous subfossil specimens from Nosy Be, Madagascar. One dry female carapace containing fragments of body, from Amirante Island.

Dimensions: Female specimen 458F, from Admirante Island: LVL 0.927mm, LVH 0.596 mm. It fits at the upper lefthand edge of the scatter plot for the population from Nosy Be ( Maddocks 1995, Graph 1). Hartmann (1964) reported the following measurements: Female LVL 0.95 mm, LVH 0.56 mm, RVL 0.93 mm, RVH 0.50 mm; Male: LVL 1.04 mm, LVH 0.61 mm, RVL 1.02 mm, RVH 0.57 mm. The following dimensions were reported by Maddocks (1969): Adult male USNM 121252, LVL 1.09 mm, LVH 0.57 mm, RVL 1.03 mm, RVH 0.52 mm; Adult female USNM 121253, LVL 1.096 mm, LVH 0.61, RVL 1.01 mm, RVH 0.57 mm. A length-height scatter plot for the subfossil population of Nosy Be, Madagascar, was published by Maddocks (1995, Graph 1, p. 236a).

Supplemental Description. Fig. 16A is a digital scan of a contact paper print of an over-exposed photographic negative of an over-stained dissection of specimen 13M from Nosy Be, made in 1967. In left-lateral view, it shows the compressed head capsule with upper and lower lips, atrium, esophagus, rotated EV with ring, plate, shafts of two braces, and aprons inserted against the Hs strut [see Maddocks (2018) for discussion of the gross anatomy]. The posterior margin of the plate ( Fig. 16G ) appears to be coarsely scalloped.

The plate of specimen 458F is narrowly fan-shaped, with nearly straight edges, undulating anteromarginal scrolls, and an irregularly scalloped posterior margin, which has broad teeth on either side of a narrow medial gap, one or two smaller teeth, and multilobate corner teeth.

The slightly damaged LV of specimen 458F is high-arched with a steep, continuously-sloping posterodorsal margin, well developed posteroventral denticle, and a well-developed row of plumose setae above the caudal angle. The posterodorsal opaque spot that is usual in N. schulzi is not visible.

Remarks: Hartmann (1964) pointed out differences of size, shape and marginal denticulation from N. longisetosa , with careful illustrations of the antennal hook, marginal denticles, plumose caudal setae and the finely crenulate (microcrystalline) texture of the hinge elements. Many of those traits have proved to be diagnostic for the genus. Maddocks (1995) clarified the taxonomic concept for the genus and some Indo-Pacific occurrence records for the species.

Distribution: On calcareous algae at Ghardaqa, common to 80 m in the Gulf of Aqaba, Red Sea; common in shallow carbonate environments around Nosy Be, Madagascar; near Anse Royale on Mahe Island, Amirante Island group, The Seychelles.

Figures

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 4. A–G, Neonesidea decipiens (M̹ller), specimen 170F; H–N, Neonesidea mediterranea (M̹ller), specimen 171F. A–B, RV and LV exteriors in TL; C–D, RV and LV exteriors in RL; E, AMS and NPC of RV; F, VV of EV with ring, plate, bracket and both braces; G, marginal teeth of plate; H, A2 claw; I, posteroventral denticles of LV; J, posteroventral frill of RV; K–L, DV of EV with plate, bracket and braces; M–N, RV and LV exteriors in TL. Scale bar = 50 µm.

FIGURE 5. A–U, Neonesidea dinochelata (Kornicker). A, C, specimen 4071RV; B, D, specimen 4070LV; E–F, specimen 4047W; G–H, specimen 4048RV; I, J, specimen 4068RV; J, L, specimen 4067LV; all from the Bahamas. M, specimen 4949RV; N–O, specimen 4050LV; both from Belize. P–T, specimen 4065W from Grand Cayman Island. U, specimen 4069RV from Florida Keys. V–Z, Neonesidea sp. aff. N. dinochelata (Kornicker). V, specimen 4052RV from Belize; W–Z, specimen 4072W from Guantanamo Bay, Cuba. A, E, G, I, M, P, U–V, W, all RV exteriors in TL; B, F, J, N, Q, X, all LV exteriors in TL; C, H, K, R, Y, all AMS of RV; D, L, O, S, Z, all AMS of LV; T, DV of RV and LV in TL. Scale bar = 50 µm.

FIGURE 16. Neonesidea schulzi (Hartmann). A–G, specimen 013M; images scanned from contact paper print from over-exposed negative film of over-stained preparation, taken in 1967; magnifications were not recorded. H–I, specimen 767W; J–K, specimen 768F; L, specimen 3080F. A, lateral view of compressed head capsule with EV, showing forehead, atrium, labrum, esophagus, chitinous struts, and EV with ring, plate, and braces; B, A2 claw; C, lateral view of both hemipenes, folded; D–E, DV of both hemipenes and zygum; F–G, EV and plate; H–K, RV and LV exteriors in TL; L, posterior spine of LV and fan-shaped plumose sensilla, by SEM. Scale bar = 50 µm.