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| Chromis tingting
Tea, Gill & Senou, 2019
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Abstract
Chromis tingting sp. nov., is described on the basis of the holotype and three paratypes from Sagami Bay, Japan. The new species likely belongs to a complex consisting of C. mirationis, C. okamurai and C. struhsakeri, with which it shares the following character combination: dorsal rays XIV,13–14; anal rays II,12; pectoral rays 19–20; tubed lateral-line scales 15–17; two spinous procurrent rays dorsally and ventrally in the caudal fin; and a generally silvery white adult coloration. The new species differs from the other members of its complex in coloration details (particularly in juvenile coloration), and in having fewer gill rakers (5–6 + 17–20 = 22–26), and a larger eye -(13.7–19.4 % SL). The new species has previously been confused with Chromis mirationis, and the contention is herewith briefly discussed.
Keywords: Pisces, taxonomy, ichthyology, Ryukyu Archipelago, Sagami Bay, deep-water
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| FIGURE 2. Chromis tingting sp. nov., KPM-NI 30479, 53.6 mm SL, holotype, Izu Peninsula, Sagami Bay, Shizuoka Prefecture, Japan. Photo by H. Senou. |
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| FIGURE 6. Chromis tingting sp. nov., juvenile specimen from Kashiwajima, Japan. Note the large black spot on the pectoral fin axil. Photo by K. Nakajima. |
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| FIGURE 5. Chromis tingting sp. nov., underwater photo in 50-60 m, Izu Oceanic Park, Sagami Bay, Honshu, Japan. Note Sacura margaritacea and Pseudolabrus sieboldi in the background. Photo by H. Tatsuuma. |
Chromis tingting sp. nov.
New standard Japanese name: Gekko-suzumedai
English common name: Moonstone Chromis
Chromis mirationis [non Tanaka 1917]; Song et al. 2014: 2, figs 1a–c and 2, table 1 (larval description and identification).
Holotype. KPM-NI 30479, 53.6 mm SL, Japan, Shizuoka Prefecture, west side of Sagami Bay, ....
Diagnosis. The following combination of characters distinguishes C. tingting from all congeners: dorsal rays XIV,13–14; anal rays II,12; pectoral rays 19–20; tubed lateral-line scales 15–17; gill rakers 5–6 + 17–20 = 22–26; caudal fin with two spinous procurrent rays dorsally and ventrally. Chromis tingting can be further distinguished from congeners based on color patterns, and in having a large black spot on the pectoral fin base that reaches the lower limits of the axil.
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Etymology. Named in honor of the first author’s mother, in recognition of her unconditional love, support and encouragement. To be treated as a noun in apposition.
The common name Moonstone Chromis refers to the pearlescent, silvery-blue coloration of the juveniles and adults of this species. “Gekko”, of the new standard Japanese name, means moonlight in Japanese.
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| FIGURE 7. Juveniles and adults of selected Chromis species: A1: Chromis tingting sp. nov., juvenile, Hachijo-Jima, Japan (Photo by Kiss2Sea); A2: Chromis tingting sp. nov., adult, Izu Oceanic Park, Japan (Photo by W. Takase); B1: Chromis mirationis, juvenile, aquarium specimen from Okinawa (Photo by Y.K. Tea); B2: Chromis mirationis, adult, aquarium specimen from Izu peninsular (Photo by Y.K. Tea); C1: Chromis okamurai, juvenile, Kashiwajima, Japan (Photo by K. Nakajima); C2: Chromis okamurai, adult, Kashiwajima, Japan (Photo by K. Nakajima); D1: Chromis struhsakeri, juvenile, Midway Atoll (Photo by R. Whitton); D2: Chromis struhsakeri, adult, Midway Atoll (Photo by R. Whitton). |
Yi-Kai Tea, Anthony C. Gill amd Hiroshi Senou. 2019. Chromis tingting, A New Species of Damselfish from Mesophotic Coral Ecosystems of southern Japan, with Notes on C. mirationis Tanaka (Teleostei: Pomacentridae). Zootaxa. 4586(2); 249–260. DOI: 10.11646/zootaxa.4586.2.2