Godzilliognomus schrami Iliffe, Otten & Koenemann, 2010, new species
Creators: name: Iliffe, Thomas M.
name: Otten, Tina
name: Koenemann, Stefan
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Remipedia
Nectiopoda
Godzilliidae
Godzilliognomus
Godzilliognomus schrami

description: Godzilliognomus schrami, new species
(Figs. 2–5)
Type locality: Windermere Abyss, Eleuthera, Bahamas.
Material examined: Eleven specimens, including a 7.9 mm holotype and ten paratypes, were collected from the type locality on August 24, 2007 by Thomas M. Iliffe. All specimens with 16 trunk segments. Paratypes 1–3 (7.4 mm, 6.8 mm, and 7.3 mm, respectively) were dissected for examination and preserved in glycerine (retained in research collection of SK). Paratypes 4–10 (5.6 to 7.2 mm; ZMB 27739) and the holotype (ZMB 27739), all preserved in alcohol as whole specimens, were deposited at the Museum für Naturkunde, Berlin (ZMB).
Etymology: In honor of Professor Emeritus Frederick R. Schram, formerly of the San Diego Natural History Museum and the Zoological Museum of the University of Amsterdam, the epithet schrami has been chosen. Professor Schram is renowned for his contributions to crustacean biology, including Remipedia.
Diagnosis: A very small-sized and slender species, body length up to 8 mm, adult specimens composed of 16 trunk segments; dorsal ramus of antennule 10-segmented, ventral flagellum with 2 segments; maxilla and maxilliped robust, pseudochelate, distal segments partly fused, very narrow; claw of maxilla and maxilliped composed of 5 denticles; anal segment longer than wide; caudal rami reaching approximately 75% of length of anal segment.
Description: Based on holotype and paratypes. Body small with a maximum length of 8 mm and 16 trunk segments (Fig. 2). Sternal bars isomorphic. Pleural tergites comparatively narrow, with acuminate posterolateral corners, becoming more angular in posterior part of trunk (Fig. 3 A). Cephalic shield with convex lateral margins at insertion of antennule, approximately as long as trunk segments 1–3 (Fig. 3 A). First trunk segment very narrow, partly covered by head shield. Frontal filaments (Fig. 4 C) long, cylindrical, with slender distomedial process being approximately half as long as main filament, ending below tip of main filament.
Antennule (Fig. 4 A): Peduncle bears few aesthetascs. Dorsal ramus 10-segmented, reaching up to 2/3 of length of body. Ventral flagellum 2-segmented, reaching 1/7 of length of dorsal ramus.
Antenna (Fig. 4 B): Proximal segment of protopod with about 4 marginal setae; distal segment with ca. 8 marginal setae. Exopod with oval shape, approximately as long and wide as adjacent distal segment of protopod, bearing about 16 long setae. Endopod slightly bent, 3-segmented; first two proximal segments with about 6 and 4 setae, respectively; distal segment with 10 setae. All setae plumose.
Mandible (Fig. 4 E–G): Molar process slightly oval; bearing dense plumose setae. Left incisor process with four large denticles; left lacinia mobilis slightly crescent-shaped. Right incisor process and lacinia mobilis with three large denticles.
Labrum (Fig. 4 D): Bearing a distinct median, and two smaller lateral clusters of fine setules on apical margin.
Maxillule (Fig. 5 A): Segment 1 with slender endite, bearing 7 stout setae on distal margin, two of which serrated (Fig. 5 D). Second segment with spatulate, broad endite, with several setae of unequal length and short stout setae along apical and subapical margins. Segment 3 short; without endite; bearing 1–2 short setae. Segment 4 (lacertus) robust, bearing two rows of about 8 setae, respectively. Segment 5 shorter than lacertus. Sixth segment very short, with two distomedial clusters of long, slender setae. Claw long, about 3–4 times longer than sixth segment.
Maxilla (Fig. 5 B): Robust, pseudochelate, distal segments partly fused. Segment 1 with 3 endites, each with 1 prominent apical stout seta accompanied by several short and medium-long, naked setae along subapical margins. Endite of second segment rounded, bearing 2 long setae. Segment 3 (lacertus) robust, medial margin expanded, with dense rows of long and short plumose setae (Fig. 5 E). Segments 4–6 of brachium fused, very narrow, bearing medial rows of foliaceous setae (Fig. 5 F). Division between fourth segment and adjacent distal part of brachium weakly defined. Claw with 5 acuminate denticles and thumb-like pad bearing a few apical setae (Fig. 5 G).
Maxilliped (Fig. 5 C): Robust, similar to maxilla, but more slender. Suture between proximal segments indistinct. Segment 1-3 with short, rounded endites bearing several setae. Segment 4 (lacertus) robust, medial surface with dense rows of plumose setae and simple setae of unequal length. Brachium very narrow, bearing medial rows of foliaceous setae, distal part naked; segments 5–8 fused. Claw similar to that of maxilla.
Trunk appendages (Fig. 3 B, C): Becoming smaller and less setose posteriorly. Endopod of first trunk appendage (Fig. 3 B) small; segments 2 and 3 with a few long setae along lateral margins; segment 4 with long setae along lateral and apical margins. Exopod almost 1.3 times longer than endopod; segments bearing long setae along lateral and medial margins. Trunk appendages of seventh trunk somite (Fig. 3 C) robust, large.
First segment of endopod with single spine-like plumose seta on distolateral corner (Fig. 3 E); segments 2–4 bearing long setae along lateral and/or medial margins; segment 3 with single spine-like serrate seta on distolateral margin (Fig. 3 D). Exopod slightly longer than endopod; first segment with several lateral setae; segments 2-3 with long setae along lateral and medial margins. All long and slender setae on trunk limbs plumose.
description: Published as part of Iliffe, Thomas M., Otten, Tina & Koenemann, Stefan, 2010, Godzilliognomus schrami, a new species of Remipedia (Crustacea) from Eleuthera, Bahamas, pp. 61-68 in Zootaxa 2491 on pages 62-67, DOI: 10.5281/zenodo.195641