Nephtyidae

Murray, Anna, Wong, Eunice & Hutchings, Pat, 2015, Nephtyidae (Annelida: Phyllodocida) of Lizard Island, Great Barrier Reef, Australia, Zootaxa 4019 (1), pp. 414-436 : 433

Key to species of Nephtyidae of Lizard Island

1. Parapodia with branchiae ( Figs 1 C, 2C, 3D)................................................................ 2

- Parapodia without branchiae ( Figs 5 C, 6F), or if present, reduced in size and straight..................3 ( Micronephthys )

2. (1) Lyrate chaetae present ( Fig. 2 G); notopodial interramal branchiae involuted ( Fig. 2 C, E); proximal region of pharynx with ver- rucae............................................................................................... 6

- Lyrate chaetae absent; notopodial interramal branchiae recurved, start on chaetiger 5 and continue to posterior chaetigers; proximal region of pharynx smooth.......................................................... Nephtys inornata

3. (1) Notopodia of chaetiger 1 with specialised dentate chaetae (margin with teeth fused to form knobs, Fig. 11 D); eyespots present between chaetigers 2 and 3..................................................................... M. stammeri

- Notopodia of chaetiger 1 without specialised dentate chaetae................................................... 4

4. (3) Eyes externally visible ( Figs 4 A, 8A)...................................................................... 5

- Eyes not visible externally.............................................................. M. platycephala n.sp.

5. (4) Two pairs of lensed overlapping eyes present on prostomium ( Fig. 4 A).................................. M. oculifera

- One pair of eyes present at level of chaetiger 2 ( Fig. 8 A)...................................... M. cf. sphaerocirrata

6. (2) Involute interramal notopodial branchiae present from chaetiger 7, interramal neuropodial branchiae present from chaetiger 8– 10 ( Fig. 3 D); middorsal subdistal pharyngeal papilla absent.................................... Aglaophamus verrilli

- Involute interramal notopodial branchiae present from chaetiger 3, neuropodial branchiae absent ( Fig.1 C, E); elongate middor- sal subdistal pharyngeal papilla present................................................. Aglaophamus cf. lobatus

Figures

FIGURE 1. Aglaophamus cf. lobatus, specimen stained with methyl blue, AM W. 46976. A. Anterior end, dorsal view; B. Anterior end, ventral view; C. Anterior end, lateral view, branchiae starting from chaetiger 3; D. Anterior chaetigers, lateral view; E. Mid-body chaetigers, lateral view; F. Posterior chaetigers, lateral view. Abbreviations: ac = acicula, an = antenna, br = interramal branchia, cp = cilia patch, dc = dorsal cirrus, ne 1 = neuropodium 1, no 1 = notopodium 1, nu = nuchal pit, p = palp, pel = preacicular parapodial lobe, pol = postacicular parapodial lobe, vc = ventral cirrus. Scale bars: A – F = 0.1 mm.

FIGURE 2. Aglaophamus cf. lobatus, SEM photos of AM W. 46973. A. Anterior end, dorsal view; B. Prostomium and chaetigers 1 – 2, dorsal view; C. Chaetigers 1 – 4, lateral view; D. Chaetigers 10 – 12, lateral view; E. Posterior chaetigers, lateral view; F. Notopodium 1, right side, dorsal view, showing barred and spinose chaetae and dorsal cirrus; G. Lyrate and spinose chaetae; H. Notochaetae of parapodium 20. Abbreviations: an = antenna, acl = acicular lobe, b = barred chaeta, br = interramal branchia, cp = cilia patch, dc = dorsal cirrus, ly = lyrate chaeta, ne 1 = neuropodium 1, no 1 = notopodium 1, nu = nuchal pit, p = palp, pel = preacicular parapodial lobe, pol = postacicular parapodial lobe, sp = spinose chaeta, vc = ventral cirrus. Scale bars: A – F = 0.1 mm; G – H = 0.01 mm.

FIGURE 3. Aglaophamus verrilli, specimen stained with methyl blue, AM W. 46971. A. Anterior end, dorsal view; B. Anterior end, ventral view, pharynx everted; C. Anterior end, lateral view, pharynx everted; D. Anterior segments, lateral view. Abbreviations: ac = acicula, an = antenna, db = dorsal interramal branchiae, dc = dorsal cirrus, e = eye, p = palp, pol = postacicular parapodial lobe, pp = pharyngeal papillae, vb = ventral interramal branchiae, vc = ventral cirrus. Scale bars: A – D = 0.1 mm.

FIGURE 4. Micronephthys oculifera, specimens stained with methyl blue. A. Anterior end, dorsal view, AM W. 41544; B. Anterior end, dorsal view, pharynx everted, AM W. 41511; C. Anterior end, lateral view, AM W. 41578. Abbreviations: an = antenna, e = eye, cp = ciliated patches, p = palp. Scale bars: A – C = 0.1 mm.

FIGURE 5. Micronephthys oculifera, SEM photos, AM W. 43653 (A – C), AM W. 41518 (D – F). A. Anterior end, dorsal view; B. Posterior end, ventral view; C. Chaetigers 12 – 13, lateral view; D. Barred and spinose chaetae, chaetiger 36; E. Barred and lyrate chaetae, inset with magnification of spinose chaetae, chaetiger 20; F. Postacicular lyrate chaetae, chaetiger 21. Abbreviations: b = barred chaeta, cp = cilia patch, dc = dorsal cirrus, ly = lyrate chaeta, pyc = pygidial cirrus, sp = spinose chaeta. Scale bars: A = 0.1 mm, B – C = 0.05 mm, D – F = 0.01 mm except for enlarged image 2 µm.

FIGURE 8. Micronephthys cf. sphaerocirrata, specimen stained with methyl blue, AM W. 46983. A. Anterior end, dorsal view; B. Chaetigers 2 – 8, lateral view. Abbreviations: an = antenna, cp = cilia patch, dc = dorsal cirrus, e = eye, no 1 = notopodium 1, p = palp, vc = ventral cirrus. Scale bars: A – B = 0.1 mm.

FIGURE 11. Micronephthys stammeri, SEM photos of AM W. 46980. A. Anterior end, ventral view; B. Prostomium and chaetigers 1 – 2, dorsal view; C. Prostomium and chaetiger 1, ventral view; D. Dentate and capillary notochaetae of chaetiger 1; E. Capillary neurochaetae of chaetiger 1; F. Notochaetae of chaetiger 14; G. Notopodia of chaetigers 14 – 15, dorsal view; H. Chaetiger 14, lateral view; I. Posterior chaetigers, lateral view. Abbreviations: acl = acicular lobe, an = antenna, b = barred chaeta, cap = capillary chaeta, cp = cilia patch, d = dentate chaeta, dc = dorsal cirrus, ly = lyrate chaeta, ne 1 = neuropodium 1, no 1 = notopodium 1, nu = nuchal pit, p = palp, pel = preacicular parapodial lobe, sp = spinose chaeta, vc = ventral cirrus. Scale bars: A – C = 0.1 mm, D – I = 0.01 mm.