Baharilana kiabii, Khalaji-Pirbalouty, Valiallah & Wägele, Johann-Wolfgang, 2011

Khalaji-Pirbalouty, Valiallah & Wägele, Johann-Wolfgang, 2011, Two new species of cirolanid isopods (Crustacea: Isopoda: Cirolanidae) from Qeshm and Kish Islands in the Persian Gulf, Zootaxa 2930, pp. 33-46: 34-39

publication ID 10.5281/zenodo.278013

persistent identifier

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scientific name

Baharilana kiabii

sp. nov.

Baharilana kiabii  sp. nov.

( Figs 1–4View FIGURE 1View FIGURE 2View FIGURE 3View FIGURE 4)

Material examined. Holotype. Male (6.0 mm), Qeshm Island, Southwestern coast, sandy shore, Persian Gulf, 10 January 2008, 26° 51 ’N, 56 °08’E, coll. R. Naderloo and A. Kazemi ( ZMH –K – 42589).

Diagnosis. Body 3.1 as long as greatest width; head with compelet interocular furrow. Pleonite 2–5 and pleotelson dorsal surface with scattered small tubercles; pleonite 5 with blunt, rounded dorso-median projection. Pleotelson bearing 2 sub-median longitudinal parallel ridges; apex narrowly rounded with 6 marginal robust setae. Appendix masculina, stout, with broadly rounded apex, covered with small scale setae, extending just beyond exopod.

Description of male. Body 3.1 times as long as greatest width, widest at pereonite 5 ( Fig. 1View FIGURE 1 A). Head with weak interocular furrow, without rostral point. Pereonites unornamented; pereonite 1 about 2 times as long as pereonite 2; pereonite 2 shortest; all pereonites with 1–3 weak transverse furrows; pereonite 7 with 2 weak and 1 very clear transverse furrow; pereonites 2–3 with sub-quadrate coxal plates; all coxal plates with entire, oblique carina ( Fig. 1View FIGURE 1 B).

Pleon with pleonite 1 slightly concealed by pereonite 7; pleonites 2–5 with some scattered small tubercles; pleonites 3–4 epimera with longitudinal sutures; pleonite 5 dorsal surface with a median projection.

Pleotelson 0.75 times as long as anterior width, lateral margins narrowing to narrowly rounded posterior margin, dorsal surface bearing scattered small tubercles, with 2 sub-median longitudinal parallel ridges running nearly all the length of the pleotelson, posterior margin with 6 robust marginal setae set between long plumose setae ( Figs 1View FIGURE 1 A,F; 11 C).

Antennule ( Fig. 1View FIGURE 1 D) peduncle articles 1 and 2 not fused, peduncle article 3 about 0.7 times as long as combined lengths of articles 1 and 2; flagellum with 8 articles, second of which is longst, articles 2–7 each bearing aesthetascs.

Antenna ( Fig. 1View FIGURE 1 E) peduncle article 5 subequal in length to peduncle article 4; peduncle article 4 with 3 small sensory palmate setae on medial surface and 7 simple setae on distal margin; peduncle article 5 with 2 small sensory palmate setae and 4 simple setae on distal margin; flagellum with 15 articles, extending to posterior of pereonite 1.

Frontal lamina ( Fig. 1View FIGURE 1 C) lateral margins concave, narrowing towards base, anteriorly rounded.

Left mandible ( Fig. 2View FIGURE 2 C) molar process anterior margin with about 21 teeth, fringed with dense fine marginal setae; spine row composed of 8 spines surrounded by numerous setae of varying length; palp article 1 with 1 lateral simple seta, palp articles 2 and 3 with 6 and 12 robust biserrate setae respectively.

Maxillule ( Fig. 2View FIGURE 2 A) lateral endite with 11 robust simple or weakly serrated setae; mesial endite with 3 large and 1 small circumplumose setae and 2 short simple setae.

Maxilla ( Fig. 2View FIGURE 2 B) lateral and middle endites each with 5 and 7 long finely plumose setae; mesial endite with 4 long finely plumose and 7 circumplumose setae.

Maxilliped ( Fig. 2View FIGURE 2 D) endite with a small slender lobe distally robust seta, bearing 4 long circumplumose setae and 2 coupling hooks; palp articles 2–5 lateral margins with 1, 7, 3 and 4 slender simple setae respectively; articles 4 and 5 with 2 and 4 distally serrate setae on medial margins.

Pereopod 1 ( Fig. 3View FIGURE 3 A) basis twice as long as wide, superodistal margin with 2 long simple submarginal and 1 small sensory palmate setae; ischium superodistal margin produced and triangular with 5 long slender simple setae, inferior margin with 2 short simple and 1 molariform robust setae, mediodistal margin with 3 long and 1 short simple slender setae; merus superodistal corner overriding carpus with 5 long simple setae, inferior margin with 5 molariform and 3 bifid robust setae; carpus triangular; propodus inferior margin with 3 bifid and 2 slender simple seta, superodistal angle with 2 slender simple and 1 sensory palmate setae; dactylus with minute secondary unguis. Pereopod 2 ( Fig. 3View FIGURE 3 B) and 3 ( Fig. 3View FIGURE 3 C) similar to pereopod 1, merus inferodistal corner without extension toward carpus; with fewer molariform robust setae on merus inferior margins.

Pereopod 4 ( Fig. 3View FIGURE 3 D) similar to pereopod 5 ( Fig. 3View FIGURE 3 E), and intermediate in form between pereopods 1–3 and 6– 7.

Pereopod 6 ( Fig. 3View FIGURE 3 F) basis 2.1 times as long as wide, superior margin with 2 long and 1 small submarginal slender and 3 sensory palmate setae; ischium superodistal angle with 5 biserrate and 1–2 bifid setae, merus superodistal angle with 2 long robust bifid setae and 5 biserrate setae, inferodistal angle with 2 small and 1 long bifid and 1 biserrate setae, carpus distal margin with 7 biserrate and 3 long bifid robust setae.

Pereopod 7 ( Fig. 3View FIGURE 3 G) similar to pereopod 6 as illustrated.

Pleopod 1 ( Fig. 4View FIGURE 4 A) exopod and endopod with 34 and 16 plumose marginal setae; endopod one-third width of exopod, medial margin straight, fringed with setules, lateral margin weakly concave; exopod ovate, with 2 biserrate setae on lateral margin, medial and lateral margins evenly rounded; sympod nearly as broad as long, mesial margin with 5 coupling hooks, lateral margin with single plumose seta.

Pleopod 2 ( Fig. 4View FIGURE 4 B) exopod and endopod with 40 and 23 plumose marginal setae; appendix masculina arising sub-medially, curving laterally around the endopod, extending just beyond endopod with bluntly rounded apex, covered with small cuticular spines on most of surface; sympod mesial margin with 3 coupling hooks and 1 plumose seta, lateral margin with single plumose seta.

Pleopod 3 ( Fig. 4View FIGURE 4 C) exopod and endopod with 38 and 10 plumose marginal setae, exopod with a patch of serrate scales on mesial margin and partial transverse suture; sympod with 3 coupling hooks and 1 plumose seta, lateral margin with single plumose seta,

Pleopod 4 ( Fig. 4View FIGURE 4 D) similar to pleopod 3, exopod and endopod with 43 and 8 plumose marginal setae.

Pleopod 5 ( Fig. 4View FIGURE 4 E) exopod with 40 plumose marginal setae, with a patch of serrate scales on mesial margin, and partial transverse suture; endopod without marginal setae, with lobate medial corner proximally; sympod without coupling hook, with a single long robust seta on distolateral corner.

Penes ( Fig. 4View FIGURE 4 F) short, separated by 1.3 basal width of penial process, 2.5 times as long as basal width.

Uropod ( Fig. 1View FIGURE 1 G) peduncle ventrodistal margin with 10 long plumose, 1 robust and 1 simple long setae, lateral and medial margins with 4 and 5 plumose setae respectively, medial margin fringed with small fine setae proximally; endopod extending beyond pleotelson apex, apically sub-bifid, medial margin convex with 5 robust setae, lateral margin weakly convex with 2 robust setae; exopod shorter than endopod, 3.6 times as long as greatest width, apically sub-bifid with some long simple setae, lateral margin with 3 robust setae, medial margin with 4 robust setae.

Remarks. The new species is readily distinguished from other species of this genus by the two sub-median longitudinal parallel ridges on the pleotelson and scattered small tubercles on the dorsal surface. In addition, it can be identified by a pleon with small tubercles on pleonites 2–5 and a median projection on the dorsal surface of pleonite 5.

Etymology. This species is named for Dr. Bahram Hassanzadeh Kiabi, (University of Shahid Beheshti, Tehran) to acknowledge many years of contributions to the zoology and protection of the wild world of Iran.


Zoologisches Museum Hamburg