tarsal fold

tar·sal fold

the fold marking the attachment of the levator palpebrae superioris muscle into the skin of the upper eyelid.
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Toes relative lengths I<II<V<III<IV; webbing I2-[2.sup.1/2] II [1.sup.3/4]-31V3 -1 1/2V3 -[1.sup.1/2] V; inner metatarsal tubercle distinct, small, elliptical; outer metatarsal tubercle absent; subarticular tubercles round, none bifid; supernumerary tubercles scattered on and around proximal ends of toes; terminal disc of toes elliptical, slightly wider than toes; terminal disc of Toes III, IV, and V slightly larger than those of Toes I and II; tarsal fold well-defined and flap-like.
We assign all the collected specimens to Plectrohvla chryses by their shared phenotypic features, including that juvenile specimens (UMMZ 239648-51) have the following characters: thoracic fold; eyes prominent; vent flap short, wide, thin not grooved medially; vent opening at upper level of thighs; skin of dorsum smooth; tympanum and tympanic ring evident; webbing of fingers vestigial; webbing of toes I2-[2.sup.1/2]II [1.sup.3/4]-[3.sup.1/3] III2-3IV3[1.sup.-1/2]V (UMMZ 239649); ulnar tubercles distinct, forming row; tarsal fold distinct; flanks and dorsum with same coloration and pigmentation pattern in preservative (Straughan & Wright 1969).
Foot in males 52.1-53.0% ([bar.x] = 52.6 [+ or -] 0.4) SVL, 50.4-56.3% ([bar.x] = 52.5 [+ or -] 2.3) in females; inner tarsal fold absent, inner tarsal surface bearing one tubercle, poorly defined; outer edge of tarsus without tubercles; knee and heel without prominent tubercles; inner metatarsal tubercle elongated, near 2-3 times size of rounded outer; supernumerary plantar tubercles numerous, poorly defined; subarticular tubercles large and prominent, rounded to oval; toes lacking narrow lateral fringes; no webbing; discs on all toes, discs of toes II-V expanded, larger than those of fingers; Toe V much longer that Toe III; tip of Toe V reaches to the distal border of the distal subarticular tubercle of Toe IV (condition C; Lynch and Duellman 1997).
Mendelson &Toal (1996), after reexamining the adult type specimens, concluded that four characters of the diagnostic combination (i.e., rostral keel, skin thickness, thoracic fold, tarsal fold) were erroneous.
mykter and based on our observations, discuss what are the conditions of the characters rostral keel, skin thickness, thoracic fold, and tarsal fold in this species.
meridensis given within parentheses), by being a smaller frog (larger; see Table 1), and having the tip of snout more acute (rounded), tympanum with paler coloration (darker), larger dark brown dorsal spots (smaller), two irregular bands from upper eyelids to the level of shoulders (absent), oblique inguinal band larger (shorter), throat and chest with inconspicuous spots made up of fine dark stippling that do not form well-defined spots (having discrete dark brown spots), ventral surfaces of arms and thighs almost immaculate (well-differentiated dark brown little spots), tarsal fold evident (almost absent), metacarpal tubercle more pronounced (less pronounced), tend to have a more extended foot web (less webbed), and bearing conspicuous folding flaps on toes (bearing keels).
Cloacal opening at midlevel of thighs, covered by a cloacal fold with an entire free border; thighs smooth, without tubercles; length of tibia about 47% the snout-to-vent distance; ventral and dorsal sides of tibiae smooth; tarsal fold conspicuous, elevated, not ending in tubercle; tarsal fold located towards half distal portion of tarsum, aligned with dermal keel coming alongside border of first toe, although separated by the metatarsal inner tubercle; inner metatarsal tubercle ovoid, approximately three times longer than wide and 2.5 bigger than the external metatarsal tubercle; no supernumerary tubercles; subarticular tubercles ovoid, flattened and little conspicuous; toes webbed; foot-web formula: I(1.5-2)-(0.5-1) II(1-1.5)-(0.5-1)III(1.5-2)-(1-1.5)IV(1-1.5)-1.5V (Fig.
Tarsal fold strong, short (45% of tarsal length), not ending in tubercle, having a little distal enlargement; inner metatarsal tubercle elongated.
SVL 23.4, TL 11.1, HW 8.1, HL 8.0, T 1.5, EYE 3.2, En 2.1, in 3.3, HAND 6.6, FOOT 10.3, IOD 2.9, UEW 2.2, ETS 8.5, TE 0.9, TARSUS 6.2, TARSAL FOLD 2.8.
lynchi and that species has a curved inner tarsal fold and E.
Ford & Savage (1984:5) characterized the three frogs as having "narrow nonemarginate finger and toe disks, no tarsal fold or tubercle, no toe webbing, finger I shorter than finger II, a strongly granulate (areolate) venter, a distinct sub-integumentary inguinal gland, and no vocal slits in adult males.
nicefori have ulnar and outer tarsal folds. Eleutherodactylus nicefori is smaller than E.