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Notiobia terminata (Say) var. connivens Casey - Notiobia terminata

Notiobia terminata (Say) var. connivens Casey - Notiobia terminata
se. of College Station, Brazos County, Texas, USA
April 17, 2009
Det. P. W. Messer, 2017

spmn in the EGRC collection, College Station, TX

Notiobia terminata (Say) var. connivens Casey
is what this image and location suggests to me. Its taxonomic rank could be a variant (morph), a new subspecies, or elevated (resurrected) to full species status. It was Noonan (1973) who revised Notiobia terminata by synonymizing several Casey species including the rather distinctive Anisotarsus connivens Casey, 1924: 139 described from its type locality in northcentral FL. The latter name is simply the placeholder of best fit for my morph concept based on Casey's old accounts. Unfortunately I have not yet seen a good example of connivens from Florida nor have I seen Casey's type specimen for comparison. The main point is that the morph in question here is quite distinct from individuals of typical Notiobia terminata. I am currently surveying several collections which have revealed occurrences of this variant in southeastern states (except FL) with prominence in TX and a few examples northward to OK and IL. This morph is distinguished from typical N. terminata, common in Texas, by the combination of smaller body size (most ABL ≤ 8 mm); relative to forebody the elytra is proportionately shorter and ovate (sides not straight); pronotum length:width ratio slightly greater; pronotum with greater convexity extending to basolateral borders (scant deplanation); pronotum medially very shiny due to weakly impressed microsculpture (m/s), not so distinctly isodiametric; pronotum laterally usually with punctules coarser and denser; pronotum often dark rufous contrasting with blackish elytra; median lobe smaller (< 2 mm span), stouter, with proportionately large phallic spine constantly occupying nearly the entire distal half of phallic ostium in contrast to the proportionately smaller spine occupying much of the middle third of the longer ostium in terminata. The distance from spine tip to apex of median lobe is much less than the length of the entire spine. Capture dates for connivens are well skewed toward spring (Apr - early Jun) while those of typical terminata are skewed toward mid summer to autumn. Occasionally the two morphs are captured together in spring. The two essential characters of connivens are its reduced pronotal m/s and its median lobe shorter, stouter, with large spine apicad.

There is another apparent variation in several southeastern states that fits neither typical terminata nor my concept of the connivens morph. Compared to the latter, its body size is similarly small, but pronotal sides are more converging basally, pronotal m/s is more distinct, head is larger against pronotum, ostial spine not quite as large nor as apicad. Tentatively I call this variety of Notiobia terminata either the floridanus Casey morph or the Florida morph sensu Noonan. See also: (1), (2).

Please alert me to beetles not quite fitting typical Notiobia terminata. They might someday be resurrected legally (without any "conniving") back to full species status as in the likely case of "Notiobia connivens (Casey)".

Please create replies in a separate thread on this page as I would like to continue editing my findings here. Thank you.

UPDATED 05 VI 2017.

Moved from Notiobia.

Not sure if I see series of punctures
along elytral intervlas #3 and #5. If true, then Selenophorus is a good start. Plesae cite body size.

this one doesn't have any that i can see,
even on the full-size pic. The problem is, i'm posting these on behalf of Mike, and there's no size data to add :-/

Forget Selenophorus if we can't see dorsal serial punctures.
Not sure where to go next. This one and others by Mike Quinn appear to be unpinned fresh specimens. Can't someone in Mike's TX area do taxonomic key-scoping to get at least confident genus level?

I hope Ed Riley will get to them eventually --
this material is a part of a faunal survey, i gather

Notiobia sp. - det confirmed...
Notiobia sp.,
Det. E. G. Riley 2009,
(Carabidae: Harpalinae: Harpalini)

The reason for our initial difficulty
in identification stems from the fact that this beetle does not represent typical Notiobia terminata as explained in my updated post above.