Anilocra monoma Bowman & Tareen 1983

Anilocra monoma

MATERIAL.—From Acanthopagrus latus (Houttuyn): Fish market, Jun 1977, USNM 190883, 23 (paratype). From Hilsa ilisha (Hamilton-Buchanan): Doha, 30 Aug 1976, USNM 190881, 32 (holotype). From Nematalosus nasus (Bloch): SG 608 (seine), 5 Oct 1981, USNM 191044, juvenile 19.2 (paratype). From Johnius aneus: Kita, Mar 1977, USNM 190882, 2, 23.5, 46 (paratypes).

ETYMOLOGY.—From the Greek mono (one) plus oma (suffix signifying tumor), referring to the presence of a swelling on only one margin of the dactyl in pereopods 1–4.

DIAGNOSIS.—Head with nearly straight lateral margins, only slightly concave at level of antennae 1 and 2. Antenna 1 with segment 3 produced anteriorly into rounded lobe. Dactyls of pereopods 1–4 with swelling on anterior margin, without swelling or with only faint suggestion of swelling on posterior margin. Telson broadly rounded, that of smaller specimens longer than wide, with distinct caudomedial lobe; that of larger specimens wider than long, without caudomedial lobe. Uropods slightly longer than telson, rami linear, subequal or endopod slightly longer.

ADDITIONAL DESCRIPTION.—Antenna 1 8-merous; segments 1–3 and 8 each with a few distal setules. Antenna 2 longer and broader than antenna 1, reaching midlength of pereonite 1, 8-merous. Mandible with dense cluster of apical setae on 3rd segment of palp. Maxilla 1 with 4 apical spines. Maxilla 2 with 2 spines on inner and outer lobes. Maxilliped palp with 3 apical spines. Pereopods gradually increasing in size except pereopod 7 much longer than pereopod 6; pereopods 5–7 with a few setules on distal segments. Exopods of pleopods slightly longer than endopods, with partial suture on lateral margin. Endopods of pleopod 2 with simple proximomedial lobe; endopods of pleopods 3 and 4 with complexly folded proximomedial lobes and 3 or 4 pockets on proximal third of posterior surface; endopod of pleopod 5 with very complex proximomedial lobes and surface folds, more so than shown in figure.

RELATIONSHIPS.—Only 2 known species of Anilocra have both a produced 3rd segment in antenna 1 and swellings in the dactyls of the anterior pereopods. Anilocra leptosoma Bleeker, known from Indonesia to the Gulf of Suez and South Africa, has a more slender body than A. monoma, the head is more abruptly narrowed at the level of antennae 1 and 2, the anterior pereopods have swellings on both sides, and the telson differs in shape, the sides being parallel for the proximal 2/3, then turning sharply inward and meeting in an angular apex. Anilocra dimediata Bleeker, known from Papua New Guinea, Indonesia, the Philippines, Vietnam, Sri Lanka, and Kerala, India, has a head shape similar to that of A. leptosoma, the posterolateral corners of pleonites 4 and 5 are acutely produced, and the telson is a third longer than wide.

Nerocila Leach, 1818

The Kuwait material of Nerocila is of considerable interest in that 3 of the 4 species are new.One of them is the second species in the heretofore monotypic subgenus Emphylia Koelbel, 1879, recently resurrected (Bowman, 1978). In all 3 of the new species the endopod of the uropod has a serrate lateral margin, a character known only in Nerocila trivitatta Bleeker, 1857, N. serra Schioedte and Meinert, 1881, and N. monodi Hale, 1940.