Suborbital ridge with two spines, first firm, bluntly pointed,
below anterior margin of orbit; second much larger, more
knob-like, centred below rear margin of pupil. Interorbital
ridges distinct, but not strongly sculptured, parallel from
their base at posterior tip of nasals almost to their termination
Johnson: New Australian aploactinid fishes 185
at base of first dorsal spine, where they are slightly flared
laterally; shallow groove in their interspace. No spines on
nasals. Anterior nostril a simple tube, slightly nearer tip of
snout than anterior margin of eye. Posterior nostril less
prominent, an open pore with slightly raised rim, situated
just anterior to horizontal from upper edge of pupil. Slightly
raised pores at upper base of lachrymal, interorbital above
posterior nostril, and preopercle below fourth preopercular
spine. Preopercle with 4 robust blunt spines; dorsalmost
largest, projecting laterally and slightly above the horizontal;
others with broader tips, directed perpendicular to curve of
preopercular margin, gradually reducing in length; all
densely armed with well-developed knobby prickles.
Opercular ridges poorly defined, surface of operculum
obscured by large knobby prickles. Operculum with 2
spines, upper a low blunt point, just anterior to rear tip,
second slightly smaller, short distance below on opercular
margin. Dorsal tip of operculum a small free flap, received
by well-developed V-shaped pit, the point of which is
directed toward the sixth or seventh dorsal spine. Cleithrum
with robust blunt spine. Upper and lower post-temporal
spines large, broad-based, blunt and bulbous, the former
not forming distinct point, latter with its tip hooked back
posterolaterally; supracleithral spine posterior to and slightly
below lower post-temporal, much smaller and more slender,
bluntly pointed and directed toward about sixth dorsal spine.
No other prominent spines on head. Ventral surface of lower
jaw densely covered with numerous small knobby papillae.
Each side of jaw, adjacent to ventral edge of lower lip, with
3 stubby papillae subequal in length to pupil diameter, each
also covered with small knobby papillae. Two similar stubby
papillae on medial edge of dentary, and one on rear of
dentary posteroventral to rear tip of maxillae. Four pores
along each side of dentary and a pair of pores at posterior
of symphysis. Ventral edge of dentary projecting medially.
Both lips densely covered in uniform knobby papillae.
Maxilla broad, scaled, with a short stubby papillae just
anterior to rear tip; its rear margin slightly rounded,
extending to vertical through middle of eye. Both jaws with
teeth in broad villiform bands, widest anteriorly, with at
least 12 tooth rows at widest point, no enlarged teeth. Vomer
with narrow band of minute teeth. Palatines edentulous.
Tongue stout and broadly rounded. Gill rakers as low knobs,
not evenly spaced, 1 (1–2) on upper limb and 5 (4–5) on
lower limb of first arch. No slit behind posterior hemibranch.
Branchiostegal membranes not fused to isthmus. Isthmus
with fleshy extension anteriorly, slightly expanded, its free
tip slightly longer than wide.
Suborbital ridge with two spines, first firm, bluntly pointed,below anterior margin of orbit; second much larger, moreknob-like, centred below rear margin of pupil. Interorbitalridges distinct, but not strongly sculptured, parallel fromtheir base at posterior tip of nasals almost to their terminationJohnson: New Australian aploactinid fishes 185at base of first dorsal spine, where they are slightly flaredlaterally; shallow groove in their interspace. No spines onnasals. Anterior nostril a simple tube, slightly nearer tip ofsnout than anterior margin of eye. Posterior nostril lessprominent, an open pore with slightly raised rim, situatedjust anterior to horizontal from upper edge of pupil. Slightlyraised pores at upper base of lachrymal, interorbital aboveposterior nostril, and preopercle below fourth preopercularspine. Preopercle with 4 robust blunt spines; dorsalmostlargest, projecting laterally and slightly above the horizontal;others with broader tips, directed perpendicular to curve ofpreopercular margin, gradually reducing in length; alldensely armed with well-developed knobby prickles.Opercular ridges poorly defined, surface of operculumobscured by large knobby prickles. Operculum with 2spines, upper a low blunt point, just anterior to rear tip,second slightly smaller, short distance below on opercularmargin. Dorsal tip of operculum a small free flap, receivedby well-developed V-shaped pit, the point of which isdirected toward the sixth or seventh dorsal spine. Cleithrumwith robust blunt spine. Upper and lower post-temporalspines large, broad-based, blunt and bulbous, the formernot forming distinct point, latter with its tip hooked backposterolaterally; supracleithral spine posterior to and slightlybelow lower post-temporal, much smaller and more slender,bluntly pointed and directed toward about sixth dorsal spine.No other prominent spines on head. Ventral surface of lowerjaw densely covered with numerous small knobby papillae.Each side of jaw, adjacent to ventral edge of lower lip, with3 stubby papillae subequal in length to pupil diameter, eachalso covered with small knobby papillae. Two similar stubbypapillae on medial edge of dentary, and one on rear ofdentary posteroventral to rear tip of maxillae. Four poresalong each side of dentary and a pair of pores at posteriorof symphysis. Ventral edge of dentary projecting medially.Both lips densely covered in uniform knobby papillae.Maxilla broad, scaled, with a short stubby papillae justanterior to rear tip; its rear margin slightly rounded,extending to vertical through middle of eye. Both jaws withteeth in broad villiform bands, widest anteriorly, with atleast 12 tooth rows at widest point, no enlarged teeth. Vomerwith narrow band of minute teeth. Palatines edentulous.Tongue stout and broadly rounded. Gill rakers as low knobs,not evenly spaced, 1 (1–2) on upper limb and 5 (4–5) onlower limb of first arch. No slit behind posterior hemibranch.Branchiostegal membranes not fused to isthmus. Isthmuswith fleshy extension anteriorly, slightly expanded, its freetip slightly longer than wide.
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