Schindleria squirei, Robitzch & Landaeta & Ahnelt, 2024

Schindleria squirei new species

http://zoobank.org/ DC22699E-BB64-410D-8432- 76B01C5A8A70

( Figs 2-5 View Figure 2 View Figure 3 ; Tabs I-II)

Holotype. NMW 100576 View Materials ; female, 19.2 mm standard length (SL), 20.7 mm total length (TL)L; Southeast Pacific , Chile, Rapa Nui (Easter Island), Hanga Roa; 27°8’50.11”S, 109°25’54.49”W; Nov. 2019; Vanessa Robitzch. GoogleMaps

Paratypes. NMW 100577 View Materials ; two females, 19.2 mm SL, 20.4 mm TL and 20.9 mm SL, 22.5 mm TL; one male, 17.2 mm SL, 19.2 mm TL. Otherwise, same data as the holotype GoogleMaps .

The four type specimens of Schindleria squirei n. sp. are deposited in the Naturhistorisches Museum Wien ( NMW), Vienna, Austria. The specimens are preserved in 75% EtOH .

Diagnosis

Body slender, elongated and not pigmented in preserved specimen; a species of the long dorsal fin species group with predorsal-fin length 60.2% in SL and preanal-fin length 70.4% in SL; tail distinctly shorter than abdomen, 29.8% of SL; head massive, 48.7% width in head length, with a con-con- vex dorsal profile; a relatively narrow pectoral-radial plate, 52.4% width of pectoral-radial plate length; 20-21 dorsal-fin rays; 12 anal-fin rays; first anal-fin ray situated opposite the from head to anus; tail distinctly shorter than abdomen and ending in a long, narrow caudal peduncle (ca. 12% in caudal peduncle length) ( Fig. 2 View Figure 2 ); head large with a convex profile ( Fig. 3 View Figure 3 ); eyes (ca. 26% of head length) and postorbital length (ca. 50% of head length) large; snout short (ca. 25% of head length), rounded; jaws not reaching to a vertical through the middle of the orbit; lower jaw protruding, mouth superior; the arch formed by the lower jaw wide with straight anterior outline ( Fig. 4); teeth on premaxilla (tooth bearing element of the upper jaw) along its entire ventral margin, teeth on dentary (tooth bearing element of the lower jaw) on the anterior quarter on a bony ridge.

First dorsal fin and pelvic fins absent; dorsal-fin rays 20-21; anal-fin rays 12; pectoral-fin rays 16-17; principle caudal-fin rays 13 (7+6); caudal-fin truncated; procurrent rays 5-6 dorsal, 6 ventral, gradually increasing in length; last procurrent ray somewhat elongated, simple, with no additional spine; base of first dorsal fin ray at myomeres 15-16, that of last dorsal fin ray on myomeres 33-34; base of first anal fin ray on myomeres 23-24, that of last anal fin ray on myomere 33-34; total number of myomeres 35-36 with 21-22 abdominal and 13-14 caudal; vertebrae 35-36 (inclusive urostyle), with 21-22 abdominal and 13-14 caudal; branchiostegal rays 5; pectoral radial plate longer than wide but relatively narrow with 52.4% (maximum width) in length, narrow at origin and wider distally ( Fig. 5 View Figure 5 ); gut straight; male urogenital papilla elongate, tube-like and tapering towards tip ( Fig. 6 View Figure 6 ), without projections or lobes at or near opening, that of female roundish with two short, thin and rod-like projections ( Fig. 7 View Figure 7 ); number of eggs 30-40; swim bladder small, dorsally pigmented, located in posterior half of the abdomen at myomeres 14-16 ( Fig. 4).